Patent Application
20240065908
This disclosure relates generally to devices and methods for transferring an object from a position on a first surface, onto a platform of the device, and then onto a second surface (or back to the first surface), and more specifically to devices and methods for transferring an object using an articulated transfer platform.
Countries around the world are facing an aging problem whereby in the coming decades, the majority of their populations will become dependents rather than of an independent age contributing to society. Coupled with this aging population is a growing number of people that have restricted mobility due to injury, illness, or old age. Being mobile necessitates a means of transportation (from point A to point B) as well as being transferred (from surface A to surface B).
There are various transportation aids that are often used to aid mobility. Examples include walkers, wheelchairs, slings, transfer boards and gantry hoists. Many of these devices have not been updated or improved in decades and as a result, fundamental problems associated with the operation of these transfer methods persist. These included injuries to practitioners, reduced patient health and well-being as a result of interaction with these devices, and induced stress on the health-care sector due to implications of the operation of these devices.
The fact however, is that these devices are greatly needed, as between 30% to 60% of patients in long-term care facilities need assistance with transfer to perform routine tasks such as eating a meal or going to the washroom. Without the aid of these devices, people would remain largely immobile once their health starts to fail. Similar challenges exist when performing routine medical diagnostics or conducting routine transfers with bariatrics patients. In these circumstances some transfers that may be required include (but not limited to), from a gurney to a medical imaging table (e.g. the bed of an MRI or CT scanner), movement of a patient temporarily to perform routine operations (e.g. bed cleaning, obtaining a weight measurement for the patient), or simply re-positioning of their body on their existing surface.
Currently the most popular devices used to assist in patient transfer consist of variations of lifts, slings, and transfer boards and sheets. The lifts among these systems are commonly referred to by their trade name as Hoyer Lifts, Hoyer being a popular manufacturer of these devices. These lifts have been in the market for decades with most innovations focusing on improving or re-packaging existing lift technologies. Current technologies typically place significant strain on a human operator, as they typically require some form of “staging” where a sling (or other strap(s) or harnesses) must be inserted underneath a patient, and then removed from under the patient after a transfer. Furthermore, these devices are often costly and may put heavy burdens on operating budgets of long-term care and health care facilities. These devices are also error prone, which often results in numerous injuries to the individuals being transferred, and in some cases has even resulted in death.
The following introduction is provided to introduce the reader to the more detailed discussion to follow. The introduction is not intended to limit or define any claimed or as yet unclaimed invention. One or more inventions may reside in any combination or sub-combination of the elements or process steps disclosed in any part of this document including its claims and figures.
Transfer devices as disclosed herein include articulated transfer platforms and a transfer belt that overlies the transfer platforms. The articulated platforms include a series of segments or slats that are coupled to each other in a manner that allows adjacent platform segments to pivot relative to each other.
The disclosed transfer devices may be used to perform a transfer of an object from an initial starting position on a surface, onto the device's platform, and then transfer the said object off again onto the same or a different desired surface. For example, an articulated platform may be extended to a position underneath an object to be transferred (e.g. a human body)—i.e. between the object and a surface on which the object is supported—and then retracted with the object supported by the transfer belt and the articulated platform so that the object is positioned above the body of the transfer device. Additionally, or alternatively, an articulated platform may be extended to transfer an object positioned above the body of the transfer device (i.e. supported on the transfer belt) onto to a remote surface.
Transfer devices with articulated transfer platforms may have one or more advantages. For example, the ability of adjacent platform segments to pivot relative to each other may allow the transfer platform to flex, curve, or otherwise conform to the shape of a lower surface of an object to be transferred (e.g. a human body) and/or to a surface on which the object is resting (e.g. a soft mattress, a padded CT table). The ability of an articulated platform to be deformed in a controlled manner may result in reduced normal forces as it is extended underneath the object. As a result, there may be a lower potential for damage and/or discomfort to the object/patient being transferred.
As another example, articulated transfer platforms may be stored in a relatively small volume when in a retracted configuration. This may allow a transfer device to have a transfer platform that can extend laterally by a length greater than the width of the device body (i.e. when the transfer platform is in a retracted configuration). Put another way, an articulated transfer platform may be retracted/stored in a volumetric space that has a smaller width than the extent of the platform's lateral reach.
As another advantage, a transfer device with articulated transfer platforms may allow an object to be transferred to/from both sides of the device. For example, the transfer device may be positioned between an object to be transferred (e.g. a patient on a hospital bed or gurney) and a surface onto which the object is to be transferred (e.g. a CT or MRI bed). An articulated transfer platform may be extended from one side of the transfer device, used to transfer the object from a first surface (e.g. a hospital gurney) onto a central portion of the transfer device, and then an articulated transfer platform may be extended from the other side of the transfer device, and used to transfer the object from the central portion of the transfer device to a second surface (e.g. a CT bed).
Transfer devices as disclosed herein may be characterized as being mechatronic in nature, e.g. utilizing a mechanical system with computer-controlled, semi-autonomous or full-autonomous control systems and associated control algorithms. Optionally, the control systems may allow a transfer device to perform a transfer operation of the desired object predictably and safely, with consistent repeatability.
In accordance with one broad aspect of this disclosure, there is provided a transfer device comprising: a device body having a first end, a second end, a first side, and a second side; and an articulated transfer platform comprising: a distal platform segment having a first end, a second end, a leading edge extending between the first end and the second end, a trailing edge extending between the first end and the second end, and a distal locking mechanism; a plurality of intermediate platform segments, including a lead intermediate platform segment and one or more successive intermediate platform segments, each intermediate platform segment having a first end, a second end, a first edge extending between the first end and the second end, a second edge extending between the first end and the second end, and an intermediate locking mechanism; wherein the distal locking mechanism is releasably securable to the intermediate locking mechanism of the lead intermediate platform segment, and wherein the intermediate locking mechanism of each successive intermediate platform segment is releasably securable to the intermediate locking mechanism of a preceding intermediate platform segment; and wherein, in a stowed position, the one or more successive intermediate platform segments are positioned below the lead intermediate platform segment, and wherein, in an extended position, the distal platform segment is located laterally away from the device body, the distal locking mechanism is secured to the intermediate locking mechanism of the lead intermediate platform segment, and the intermediate locking mechanism of one of the successive intermediate platform segments is secured to the intermediate locking mechanism of the lead intermediate platform segment.
In some embodiments, the distal locking mechanism is located proximate the first end of the distal platform segment, and for each intermediate platform segment, the intermediate locking mechanism is located proximate the first end of the intermediate platform segment.
In some embodiments, the transfer device further comprises a transfer device controller configured to control the articulated transfer platform.
In some embodiments, the transfer device further comprises a platform lateral actuator operably coupled to the transfer device controller, the platform lateral actuator being configured to selectively move the distal platform segment and intermediate platform segments secured thereto laterally relative to the device body.
In some embodiments, the transfer device further comprises a platform segment support assembly operably coupled to the transfer device controller, the platform segment support assembly being configured to selectively raise the one or more successive intermediate platform segments to bring the intermediate locking mechanism of a raised successive intermediate platform segment into alignment with the intermediate locking mechanism of a preceding intermediate platform segment.
In some embodiments, the transfer device further comprises a platform segment release actuator operably coupled to the transfer device controller, the platform segment release actuator being configured to selectively disengage the locking mechanisms of successive platform segments.
In some embodiments, in the stowed position, the distal platform segment at least partially overlies the device body.
In some embodiments, in the stowed position, the distal platform segment is secured to the lead intermediate platform segment.
In some embodiments, in the stowed position, the successive intermediate platform segments are vertically stacked below the lead intermediate platform segment.
In some embodiments, when the distal platform segment and the intermediate platform segments of the articulated transfer platform are secured to each other to produce secured segments, the secured segments may be pivoted relative to each other by about 1° to 30°, or by about 10° to 20°, or by about 15°.
In some embodiments, when the distal platform segment and the intermediate platform segments of the articulated transfer platform are secured to each other to produce the secured segments, the secured segments are biased towards a neutral alignment in which adjacent segments are generally planar.
In some embodiments, when the distal platform segment and the intermediate platform segments of the articulated transfer platform are secured to each other to produce the secured segments, a magnitude of the bias towards the neutral alignment is selectively adjustable.
In some embodiments, the device body has a width between the first and second sides of the device body, and wherein, in the extended position, a distance between the leading edge of the distal platform segment and the first side of the device body is greater than the width of the device body.
In some embodiments, the width of the device body is about 400 mm to 1000 mm, and wherein, in the extended position, the distance between the leading edge of the distal platform segment and the first side of the device body is about 600 mm to 1400 mm.
In some embodiments, the distal locking mechanism comprises one or more recesses.
In some embodiments, the distal locking mechanism comprises one or more projections.
In some embodiments, the intermediate locking mechanisms comprise one or more projections and one or more recesses.
In some embodiments, the transfer device further comprises a transfer belt having a first end secured to a first driven roller, a second end secured to a second driven roller, the belt extending from the first driven roller, around the leading edge of the distal platform segment, above an upper surface of the articulated transfer platform, and to the second driven roller, wherein the first driven roller and the second driven roller are operably coupled to the transfer device controller.
In some embodiments, the transfer belt is a first transfer belt and the transfer device further comprises a second transfer belt extending below a bottom surface of the articulated transfer platform, wherein the second transfer belt is coupled to an actuator that is operably coupled to the transfer device controller.
In some embodiments, the transfer device further comprises a belt treatment system comprising at least one of: an Ultraviolet (UV) light emitter configured to direct UV light towards at least an upper surface of the transfer belt; a fluid emitter configured to direct at least one of a cleaning fluid and a disinfectant fluid towards at least the upper surface of the transfer belt; and a fluid agitator configured to agitate fluid in a fluid chamber through which the transfer belt is configured to pass.
In some embodiments, the transfer device controller is operatively coupled to the belt treatment system, and the transfer device controller is configured to selectively actuate one or more of the UV light emitter, the fluid emitter, and the fluid agitator concurrently or separately from each other.
In some embodiments, the transfer device further comprises: a platform segment treatment system comprising at least one of: an Ultraviolet (UV) light emitter configured to direct UV light towards at least an upper surface of the one or more successive intermediate platform segments; a fluid emitter configured to direct at least one of a cleaning fluid and a disinfectant fluid towards at least the upper surface of the one or more successive intermediate platform segments; and a fluid agitator configured to agitate fluid in a fluid chamber through which the one or more successive intermediate platform segments are configured to pass.
In some embodiments, the transfer device controller is operatively coupled to the platform segment treatment system, and the transfer device controller is configured to selectively actuate one or more of the UV light emitter, the fluid emitter, and the fluid agitator concurrently or separately from each other.
In some embodiments, the transfer device further comprises a device support structure secured to the device body for supporting the device body above a floor surface, wherein the device support structure is configurable to adjust a height of the device body above the floor surface and/or an angle of the device body.
In some embodiments, the device support structure comprises a plurality of wheels to facilitate translation of the transfer device across the floor surface.
In some embodiments, at least one of the plurality of wheels is driven by a motor, such that the transfer device is able to transport itself across the floor surface.
In some embodiments, the transfer device comprises a plurality of controllable subsystems, and wherein the transfer device controller comprises a plurality of controllers configured to control the articulated transfer platform and all of the controllable subsystems.
In some embodiments, the transfer device comprises a plurality of controllable subsystems, and wherein the transfer device controller comprises a single controller configured to control the articulated transfer platform and all of the controllable subsystems.
In accordance with another broad aspect, there is provided a transfer device comprising: a device body having a first end, a second end, a first side, and a second side; and an articulated transfer platform comprising: a distal platform segment, and a plurality of intermediate platform segments, each platform segment having a first end, a second end, and a segment link positioned at each of the first and second ends, the distal platform segment having a leading edge; wherein the segment links of adjacent platform segments are pivotally coupled to each other, wherein the segment links of adjacent platform segments are configured to be selectively restrained in an aligned position; wherein, in a stowed position, the platform segments of the articulated transfer platform are engaged with an internal track of the device body, wherein, as the articulated transfer platform is extended from the stowed position, the distal platform segment is extended laterally away from the device body and the segment links of successive platform segments are restrained in the aligned position upon exiting the internal track, and wherein, as the articulated transfer platform is retracted, the segment links of successive platform segments are unrestrained from the aligned position upon entering the internal track.
In some embodiments, the transfer device further comprises a transfer device controller configured to control the articulated transfer platform.
In some embodiments, the articulated transfer platform is a first articulated transfer platform, the distal platform segment is a first distal platform segment, the intermediate platform segments are first intermediate platform segments, the internal track is a first internal track, and the transfer device further comprises: a second articulated transfer platform comprising: a second distal platform segment, and a plurality of second intermediate platform segments, each second platform segment having a first end, a second end, and a segment link positioned at each of the first and second ends, the second distal platform segment having a leading edge; wherein the segment links of adjacent second platform segments are pivotally coupled to each other, and wherein the segment links of adjacent second platform segments are configured to be selectively restrained in an aligned position; wherein, in a stowed position, the platform segments of the second articulated transfer platform are engaged with a second internal track of the device body, wherein, as the second articulated transfer platform is extended from the stowed position, the second distal platform segment is extended laterally away from the device body and the segment links of successive second platform segments are restrained in the aligned position upon exiting the second internal track, and wherein, as the second articulated transfer platform is retracted, the segment links of successive second platform segments are unrestrained from the aligned position upon entering the second internal track.
In accordance with another broad aspect, there is provided a transfer device comprising: a device body having a first side and a second side; and an articulated transfer platform comprising: a first distal platform segment, a plurality of intermediate platform segments, and a second distal platform segment, each platform segment having a first end, a second end, and a segment link positioned at each of the first and second ends, and each distal platform segment having a leading edge; wherein the segment links of adjacent platform segments are pivotally coupled to each other, and are configured to be selectively restrained in an aligned position; wherein, in a stowed position, the platform segments of the articulated transfer platform are engaged with an internal track of the device body; wherein, as the articulated transfer platform is extended from the first side of the device body, the first distal platform segment is extended laterally away from the device body and the segment links of successive intermediate platform segments are restrained in the aligned position upon exiting the internal track; wherein, as the articulated transfer platform is extended from the second side of the device body, the second distal platform segment is extended laterally away from the device body and the segment links of successive intermediate platform segments are restrained in the aligned position upon exiting the internal track; and wherein, as intermediate platform segments enter the internal track, their segment links are unrestrained from the aligned position.
In some embodiments, the transfer device further comprises a transfer device controller configured to control the articulated transfer platform.
In some embodiments, the transfer device further comprises: a transfer belt having a first end secured to a first driven roller, a second end secured to a second driven roller, the belt extending from the first driven roller, around the leading edge of the first distal platform segment, above an upper surface of the articulated transfer platform, and to the second driven roller, wherein the first driven roller and the second driven roller are operably coupled to the transfer device controller.
In some embodiments, the transfer belt is a first transfer belt and the transfer device further comprises a second transfer belt extending below a bottom surface of the articulated transfer platform on the first side of the device body, and a third transfer belt extending below a bottom surface of the articulated transfer platform on the second side of the device body, wherein the second transfer belt and the third transfer belt are coupled to actuators that are operably coupled to the transfer device controller.
In some embodiments, the transfer device further comprises: an engagement plate positioned proximate an end of the internal track, the engagement plate being configured to restrain adjacent segment links as they pass the engagement plate as the articulated transfer platform is extended, and configured to unrestrain adjacent segment links as they pass the engagement plate as the articulated transfer platform is retracted.
In some embodiments, the transfer device further comprises: a first engagement plate positioned proximate a first end of the internal track, and a second engagement plate positioned proximate a second end of the internal track, the first and second engagement plates being configured to restrain adjacent segment links as they exit the internal track, and to unrestrain adjacent segment links they enter the internal track.
In some embodiments, the device body has a width between the first and second sides of the device body, and wherein, when the articulated transfer platform is fully extended from the first side of the device body, a distance between the leading edge of the first distal platform segment and the first side of the device body is greater than the width of the device body.
In some embodiments, the transfer device further comprises: a belt treatment system comprising at least one of: an Ultraviolet (UV) light emitter configured to direct UV light towards at least an upper surface of the transfer belt; a fluid emitter configured to direct at least one of a cleaning fluid and a disinfectant fluid towards at least the upper surface of the transfer belt; and a fluid agitator configured to agitate fluid in a fluid chamber through which the transfer belt is configured to pass.
In some embodiments, the transfer device controller is operatively coupled to the belt treatment system, and wherein the transfer device controller is configured to selectively actuate one or more of the UV light emitter, the fluid emitter, and the fluid agitator concurrently or separately from each other.
In some embodiments, the transfer device further comprises: a platform segment treatment system comprising at least one of: an Ultraviolet (UV) light emitter configured to direct UV light towards at least an upper surface of the one or more successive intermediate platform segments; a fluid emitter configured to direct at least one of a cleaning fluid and a disinfectant fluid towards at least the upper surface of the one or more successive intermediate platform segments; and a fluid agitator configured to agitate fluid in a fluid chamber through which the one or more successive intermediate platform segments are configured to pass.
In some embodiments, the transfer device controller is operatively coupled to the platform segment treatment system, and wherein the transfer device controller is configured to selectively actuate one or more of the UV light emitter, the fluid emitter, and the fluid agitator concurrently or separately from each other.
In some embodiments, the transfer device further comprises a device support structure secured to the device body for supporting the device body above a floor surface, wherein the device support structure is configurable to adjust a height of the device body above the floor surface and/or an angle of the device body.
In some embodiments, the device support structure comprises a plurality of wheels to facilitate translation of the transfer device across the floor surface.
In some embodiments, at least one of the plurality of wheels is driven by a motor, such that the transfer device is able to transport itself across the floor surface.
In some embodiments, the transfer device comprises a plurality of controllable subsystems, and wherein the transfer device controller comprises a plurality of controllers configured to control the articulated transfer platform and all of the controllable subsystems.
In some embodiments, the transfer device comprises a plurality of controllable subsystems, and wherein the transfer device controller comprises a single controller configured to control the articulated transfer platform and all of the controllable subsystems.
It will be appreciated by a person skilled in the art that a method or apparatus disclosed herein may embody any one or more of the features contained herein and that the features may be used in any particular combination or sub-combination.
These and other aspects and features of various embodiments will be described in greater detail below.
For a better understanding of the described embodiments and to show more clearly how they may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:
The drawings included herewith are for illustrating various examples of articles, methods, and apparatuses of the teaching of the present specification and are not intended to limit the scope of what is taught in any way.
Various apparatuses, methods and compositions are described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover apparatuses and methods that differ from those described below. The claimed inventions are not limited to apparatuses, methods and compositions having all of the features of any one apparatus, method or composition described below or to features common to multiple or all of the apparatuses, methods or compositions described below. It is possible that an apparatus, method or composition described below is not an embodiment of any claimed invention. Any invention disclosed in an apparatus, method or composition described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing or divisional patent application, and the applicant(s), inventor(s) and/or owner(s) do not intend to abandon, disclaim, or dedicate to the public any such invention by its disclosure in this document.
Furthermore, it will be appreciated that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the example embodiments described herein. However, it will be understood by those of ordinary skill in the art that the example embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the example embodiments described herein. Also, the description is not to be considered as limiting the scope of the example embodiments described herein.
With reference to
In some implementations, the platform segments 210, 220 and 230a-h of the articulated transfer platform include a first distal platform segment 210, a second distal platform segment 220, and a plurality of intermediate platform segments 230a-h. However, only one of the intermediate platform segments 230a-h is visible in
With reference to
With reference to
In the position shown in
In the position shown in
In some implementations, some or all of the platform segments 210, 220 and 230a-h have a locking mechanism to enable adjacent segments 210, 220 and 230a-h to lock together when they are extended outward from the device body 110. In this way, the articulated transfer platform 250a or 250b has structural support to impart an outward force when being extended or ‘built out’ from the device body 110. In addition, the locking mechanism can unlock the platform segments 210, 220 and 230a-h so that they can be retracted, thereby enabling a relatively compact design for the transfer deice 100 when in the stowed position or retracted position. Thus, the combination of the platform segments 210, 220 and 230a-h and the locking mechanisms enable both (i) the articulated transfer platform 250a or 250b to have the structural support when being extended outward and (i) the articulated transfer platform 250a or 250b to be retracted in a manner that enables the relatively compact design.
In some implementations, the distal platform segment has a distal locking mechanism located proximate the first end of the distal platform segment, and each intermediate platform segment has an intermediate locking mechanism located proximate the first end of the intermediate platform segment. However, other locations for the distal locking mechanism and the intermediate locking mechanism are possible and are within the scope of the disclosure. In some implementations, the distal locking mechanism is releasably securable to the intermediate locking mechanism of the lead intermediate platform segment, and the intermediate locking mechanisms of each successive intermediate platform segment are releasably securable to the intermediate locking mechanism of a preceding intermediate platform segment.
In some implementations, in the stowed position, the one or more successive intermediate platform segments are positioned below the lead intermediate platform segment, for example in the stacked configuration depicted in
With reference again to
In some implementations, as can be seen from
Enabling the articulated transfer platform 250a to extend by at least twice the width of the device body 110 may have one or more advantages. For example, this may facilitate maneuvering the transfer device 100 through tight hallways, and/or may reduce the storage footprint of the transfer device when the articulated transfer platform is retracted. This is made possible by the combination of the platform segments 210, 220 and 230a-h and the locking mechanisms as noted above.
A relatively narrow width WD can advantageously facilitate maneuvering the transfer device 100 and/or reduce its storage footprint. However, in some cases it may be desirable for the transfer device 100 to have a supported (i.e. non-cantilevered) surface that has a relatively wider width WD. For example, the device body 110 can have a wider non-cantilevered support surface to provide increased comfort and/or safety when transporting a patient between locations by moving the transfer device 100 across a floor surface.
The examples described above focus on embodiments of the transfer device 100 implementing the articulated transfer platform using the platform segments 210, 220 and 230a-h which can be releasably securable to one another via the locking mechanisms. However, in other embodiments, the platform segments 210, 220 and 230a-h are pivotally coupled to each other (e.g. using segment links) and can move within in an internal track. For such embodiments, the platform segments 210, 220 and 230a-h are configured to be selectively restrained in an aligned position upon exiting the internal track, and conversely are unrestrained from the aligned position when entering the internal track. In the stowed position, the intermediate platform segments may not be in the stacked configuration depicted in
In some implementations, the transfer device 100 has a support structure 188 configurable to adjust a height of the device body 110 above the floor surface F and/or an angle of the device body 110. In some implementations, the support structure 188 can adjust height and tilt of the device body 110 in both the long and short axis. In some implementations, the support structure 188 has actuators coupled to a transfer device controller for controlling the height and/or the tilt of the device body 110. This can allow for changes in an angle of approach of the articulated transfer platform in advance of or during transfer in order to reduce reactionary forces on the device, reduce the pressure applied to the patient (or object) being transferred or allow for medically advantageous positions when a patient is on the transfer platform such as Trendelenburg or reverse Trendelenburg position. The actuation of these support actuators may be controlled by a main transfer device controller or separately by its own controller and operate in parallel through electronic communication with the transfer controller.
In the illustrated example, the platform segments 210, 220 and 230a-h include both the first distal platform segment 210 and the second distal platform segment 220, and the articulated transfer platform 250a and 250b is capable of extending outward in two directions (i.e. the articulated transfer platform 250a can extend outward in a first direction as shown in
In some implementations, the transfer device 100 has a transfer device controller, which can control one or more actuators (e.g. motors) to extended or retract the articulated transfer platform 250a or 250b and/or control slack of the transfer belt 150. In some implementations, the transfer device controller is coupled to one or more sensors of the transfer device 100, and utilizes data from the sensors when operating the transfer device 100. In some implementations, the controller synchronizes and directly controls the transfer device 100 with its subsystems, provides feedback to the user in regards to a state of the transfer device 100, and uses the state it is monitoring in order to provide safe operation (e.g. shutting the system down automatically if the transfer device 100 is operating in an unsafe manner).
In some implementations, the transfer device controller is a single controller (e.g. single microcontroller) configured to handle all controllable subsystems of the transfer device 100. In other implementations, the transfer device controller includes multiple controllers (e.g. separate microcontrollers) for handling the controllable subsystems of the transfer device 100. Thus, the term “transfer device controller” covers one or more controllers (e.g. one or more microcontrollers). The purpose for utilizing more than one controller may be to reduce sensor transmission lengths, increase redundancy and/or locate the controllers advantageously, physically within the transfer device 100 to reduce latency. Multiple controllers may also be utilized due to practical limitations of current state of the art controllers (e.g. number of available General Purpose Input Outputs). For example, a first controller may be placed on the first end 101 and a second controller may be placed the second end 102 to capture signals from sensors mounted on each end independently.
There are many possibilities for the controllable subsystems of the transfer device 100. As described herein, some possibilities for the controllable subsystems can include platform lateral actuator(s), a platform segment support assembly, a platform segment release actuator, driven roller(s) for transfer belt(s), a belt treatment system, and/or a platform segment treatment system. Additional or other controllable subsystems may be possible.
In some implementations, the one or more actuators controlled by the transfer device controller are powered via a battery, which can help to enable the transfer device 100 to be portable. For example, with reference to
In some implementations, the transfer device 100 has at least one control panel coupled to the transfer device controller to allow a user to operate the transfer device 100. For example, with reference back to
In some implementations, the articulated transfer platform 250a or 250b is covered by the transfer belt 150, including when it is being extended outward from the device body 110 and retracted back towards the device body 110. In some implementations, the transfer device controller controls the transfer belt 150 using one or more actuators such that, when the articulated transfer platform 250a or 250b is being extended outward from the device body 110 or retracted back towards the device body 110, a top surface of the transfer belt 150 is not moving and excess slack in the transfer belt 150 is avoided or mitigated.
The examples described herein generally focus on the transfer device 100 having a transfer device controller, which is configured to control the articulated transfer platform, and optionally provides additional functionality as described herein. However, in another embodiment, the transfer device 100 can be implemented without any transfer device controller. For instance, the transfer device 100 could be entirely analogue and designed to function without a device controller.
In some implementations, the transfer device 100 has a base 120 that includes wheels 125 for assisting in translating transfer device 100 across a floor surface. Some or all of the wheels 125 can be driven by a motor, such that the transfer device 100 is able to transport itself across the floor surface. However, it will be appreciated that the wheels 125 are optional. In other implementations, the transfer device 100 is not configured for easy mobility across a floor service. For example, with reference to
Example operation of the transfer device 100 in transferring a human body from a first surface to a second surface will now be described with reference to
The transfer device 100 is positioned between the gurney 20 with the human body to be transferred and the bed 30, e.g. in the position shown in
Referring to
In some implementations, the motion of articulated transfer platform 250 and/or the transfer belt 150 is controlled to provide limited (or zero) relative motion between an upper surface of articulated transfer platform 250 (i.e. the transfer belt 150) and the human body 10 during some or all of the transfer. In this way, the articulated transfer platform 250 can be extended outward and under the human body 10 as shown in
Optionally, a lower surface of a guard layer (e.g. guard layer 155 as described later, not shown in
In some implementations, to enable limited relative motion between the upper surface of articulated transfer platform 250 (i.e. the transfer belt 150) and the human body 10 while the articulated transfer platform 250 is being extended outward from the transfer device 100 (i.e.
Preferably, driven rollers (e.g. driven rollers 160a and 160b as described later, not shown in
Referring to
While the human body 10 is being moved from the gurney 20 towards the transfer device 100 (
Referring to
With reference to
It will be appreciated that, in use, at least some, preferably most, and more preferably substantially all of the articulated transfer platform 250 is supported vertically by a surface onto which an object is to be transferred using the articulated transfer platform 250, or a surface from which an object to be transferred is resting. In the illustrated example, the articulated transfer platform 250 receives vertical support from the gurney 20 (
To transfer the patent 10 from the bed 30 to the gurney 20, the process illustrated in
In the illustrated example, the articulated transfer platform 250 is capable of extending outward in two directions. In other implementations, the segments 210, 220 and 230a-h include only one distal platform segment and is capable of extending outward in only one direction. For such implementations, upon moving the human body 10 onto the transfer device 100, the transfer device 100 can then be repositioned (e.g. turned around by 180 degrees) before moving the human body 10 onto the bed 30.
As noted above, there can be friction between the transfer belt 150 and the surface of the gurney 20. While low friction bed sheets can reduce or mitigate such friction, other implementations are possible in which such friction can be largely avoided, because contact between the transfer belt 150 and the surface of the gurney 20 can be mitigated or avoided completely. For example, in other implementations, the transfer device 100 has a second transfer belt (not shown) extending below a bottom surface of the articulated transfer platform 250 when the articulated transfer platform 250 is extended outward, such that the second transfer belt provides limited or zero relative motion between the bottom surface of the articulated transfer platform 250 and the surface of the gurney 20. Such an implementation is briefly described below with reference to
With reference to
Therefore,
While the apparatus' and methods disclosed herein are described specifically in relation to and in use with transferring a human body (e.g. an individual with reduced, limited, or no mobility, an able bodied individual, an unconscious individual, an incapacitated individual, etc.), it will be appreciated that the apparatus' and methods may alternatively be used to transfer other objects, such as those that may be bulky, cumbersome, delicate, and/or difficult to grasp and move. For example, the apparatus' and methods disclosed herein may be suited and/or adapted for use to transfer livestock or domestic animals, undomesticated animals (e.g. in a zoo or wildlife care facility), human corpses (e.g. in a funeral home of a mortuary), inanimate objects (e.g. in courier, cargo, and/or logistical operations), and the like.
Example implementation details of the transfer device 100 are provided in this section with reference to the drawings. As noted above, it is to be understood at the outset that the transfer device 100 is shown with very specific features for exemplary purposes only. Other implementations are possible and are within the scope of the disclosure.
With reference to
With reference to
Utilizing a discontinuous transfer belt 150 may have one or more advantages. For example, this may facilitate the removal and/or replacement of the transfer belt 150 (e.g. by removing a driven roller with the transfer belt attached). This may result in the transfer device 100 being relatively easy to clean and/or maintain, which may result in reduced downtime. This may be of particular importance in use cases where cross-contamination is of concern (e.g. in hospitals, care homes, etc.).
Additionally, or alternatively, using a discontinuous belt with driven rollers on both ends may also have a mechanical advantage, in that the transfer belt's tension can be controlled from both ends of the belt. For example, this may assist in providing a desired tension level, and/or a desired level of ‘slack’ (or a lack thereof) in transfer belt 150.
As shown schematically in
In the illustrated example, the transfer belt 150 is guided around two passive (i.e. non-driven) rollers 165a and 165b to maintain tension and to avoid potentially interfering interactions with other components located within the housing (e.g. control systems, motors and motor drivers, gears, and the like). It will be appreciated that fewer, more, or no tensioners 165 may be provided in alternative embodiments.
An example belt tensioner assembly will now be described with reference to
Turning to
An advantage of this design is that it may allow the linear displacement sensor 990 to provide a high resolution signal both at relatively low transfer belt tensions (e.g. when no objects are in contact with transfer belt 150 and/or articulated transfer platform 250), and at relatively high transfer belt tensions (e.g. when a patient is being transferred on the articulated transfer platform 250).
In the illustrated example, each tensioner 165a and 165b is passively sprung. Alternatively, each tensioner 165a and 165b may be actively actuated, e.g. by providing a linear actuator instead of, or in addition to, one or more passive springs. Additionally, or alternatively, each tensioner 165a and 165b may be actively dampened, e.g. using ferro-dampening fluids or the like. In some embodiments, the relative position of each tensioner 165a and 165b may be determined by a positioning sensor (not shown) such as a Time of Flight (TOF) or linear potentiometer, for example. This determined tensioner position may be used e.g. by the transfer device controller to measure and/or infer tension within the transfer belt 150.
As shown in
As discussed above, the transfer belt 150 passes around the leading edge 213 of first distal platform segment 210 and around the leading edge 224 of second distal platform segment 220. Optionally, some or all of leading edges 213 and 224 may be provided with one or more friction-reducing features. With reference to
In some implementations, with reference to
With reference to
In the illustrated example, the end drive assembly 300a, first and second belt drive sprockets 320a and 320d are driven by motors 390a and 390d, respectively. The belt drive sprockets 320a and 320d are connected to transfer belt roller sprockets 360a and 360b by drive belts 361a and 361b, respectively. Rotation of the transfer belt roller sprockets 360a and 360b results in rotation of the transfer belt rollers 165a and 165b, respectively. In the illustrated example, tension idlers 322a and 322b are also provided to control the tension of drive belts 361a and 361b, respectively. It will be appreciated that the tension idlers 322a and 322b are optional.
Also shown are platform drive sprockets 320b and 320c, which are driven by motors 390b and 390c, respectively. The platform drive sprocket 320b is connected via a drive belt 371a to a first series of segment drive sprockets 380a and 380b. The platform drive sprocket 320c is connected via a drive belt 371b to a second series of segment drive sprockets 380c and 380d. Idlers 323a and 323b are provided in order to control tension on the drive belt 371a, and idlers 323c and 323d are provided in order to control tension on the drive belt 371b.
In the illustrated example, teeth of platform drive pinions 382a, 382b, 382c and 382d engage platform rack segments (not shown) provided on the undersides of the ends 211, 212, 221 and 222 of the distal platform segments 210 and 220, and on the undersides of the ends 231 and 232 of the intermediate platform segments 230a-h. It will be appreciated that in one or more alternative embodiments, the engagement between the end drive assembly 300a and the platform segments 210, 220 and 230a-h may not include a rack and pinion arrangement. For example, platform drive rollers may have a compressible elastomer configured to provide a sufficiently high frictional coefficient between themselves and the undersides of the ends of the platform segments 210, 220 and 230a-h.
Enabling the motor hub assembly 380 to be modular may have one or more advantages. For example, allowing an entire set of motors and drive wheels to be ‘swapped out’ may facilitate easier maintenance and/or service of the transfer device 100, which may lead to reduced downtime of the transfer device 100.
In the illustrated example, the intermediate platform segment support assembly 400 includes an upper frame member 410 and a lower frame member 420. The frame members 410 and 420 are connected in fixed relation to each other via shafts 440a and 440b. A translating frame member 430 may be moved vertically along the shafts 440a and 440b between a lowered position proximate the lower frame member 420 (e.g. as shown in
In the illustrated example, a reduction worm gear assembly 450 is provided to drive the central shaft 442. Such a configuration may allow for precise control of the speed and/or position of the translating frame member 430. Another advantage of this design is that, when not driven, positional slippage or drift of the translating frame member 430 may be reduced or eliminated.
Returning to
In the illustrated example, a tension idler 322c is also provided to control the tension of the drive belt 381. It will be appreciated that the tension idler 322c is optional.
In the illustrated example, actuation of the intermediate platform segment support assembly 400 is mechanically separate from the lateral actuation of the transfer platform 250. For example, the drive sprocket 321 and the motor 390e are not mechanically integrated with the belt drive sprockets 320a and 320d, the platform drive sprockets 320b and 320c, or with any of the motors 390a-d. In one or more alternative embodiments, a mechanical linkage system, gearing system, or the like may be provided to mechanically synchronize the operation of the platform segment support assembly 400 with the articulated transfer platform drive systems and/or the transfer belt drive systems.
In the examples illustrated in
With reference to
Each intermediate platform segment 230a-h also includes a locking mechanism, referred to generally as 500, at each end 231 and 232. In the illustrated example, the locking mechanism 500 includes a slidable pin assembly 510 that can be translated axially along the intermediate platform segment 230a. Locking pins 512 extend through corresponding transverse apertures in the projections 261 of the first distal platform segment 210. By engaging and disengaging the locking pins 512 with the projections 261, the intermediate platform segment 230a can be selectively connected and disconnected to the first distal platform segment 210.
In the illustrated example, the locking mechanism 500 is spring biased via a compression spring 515 towards a locked position (e.g. as shown in
Preferably, the platform segments 210, 220 and 230a-h are secured to each other in a manner that allows for degree of flexion between adjacent platform segments. This may facilitate articulation of transfer platform 250 during use. Such degree of flexion for the articulated transfer platform 250 may have one or more advantages, for example the articulated transfer platform 250 may be able to conform to an object that has a curved lower surface (e.g. a patient) and/or to a surface on which the object may be resting (e.g. a soft mattress).
In the illustrated example, the projections 261 are mounted on a resilient plate 281. An edge of the resilient plate 281 is secured to the first distal platform segment 210, providing a cantilevered-type connection between adjacent connected platform segments. Similarly, the projections 263a are mounted on a resilient plate 283. An edge of the resilient plate 283 is secured to the intermediate platform segment 230a.
Preferably, the dimensions, thickness and/or material of the resilient plates 281 and 283 are selected in order to provide a desired degree of bias force directing adjacent platform segments into an aligned (or neutral) position in which the adjacent segments are generally planar. It will be appreciated that the resilient plate 281 and one or more of the resilient plates 283 may be configured to provide a different degree of bias force.
In one or more alternative embodiments (not shown), the articulated transfer platform 250 may be configured to provide selective tensioning between adjacent platform segments.
Turning to
Returning to
In illustrated example, the locking pins 512 may be disengaged with projections of an adjacent transfer platform via an actuator connected to the end drive assembly 300a-b. For example, an actuator may be selectively actuated to press a plunger 525 inwardly towards intermediate platform segment 230a, translating the slidable pin assembly 510 and driving the locking pins 512 out of engagement with apertures within the projections 261, thereby decoupling the platform segments 210, 220 and 230a-h from each other. In order to secure adjacent segments, a release button 530 may be depressed to disengage the slidable pin assembly 510 from a latching mechanism (not shown), allowing the spring 515 to drive the locking pins 512 into engagement with apertures within the projections 261.
In the illustrated example, the slidable pin assembly 510 includes four of the locking pins 512. However, it will be appreciated that more or fewer pins may be provided, and that they may be provide in any suitable configuration. Also, while the locking pins 512 are cylindrical, it will also be appreciated that the locking pins 512 may have one or more other geometries (e.g. a single pin with a square profile, or multiple pins with geometries that are the same or different from each other). For example, this may assist in achieving different mechanical performance for the articulated transfer platform 250.
Returning to
As can be seen in
In the illustrated example, the slidable pin assembly 510 is biased into a locked position. It will be appreciated that the slidable pin assembly 510 may alternatively be biased into an unlocked position.
A schematic example of a ‘build out’ of transfer platform 250 will be now be described with reference to
As shown in
Turning
In order to retract the transfer platform 250, the transfer device 100 may be operated in substantially the same way, but in reverse. For example, an “n+1” intermediate platform segment (e.g. segment 230d) may be disengaged from an adjacent “n” intermediate platform segment (e.g. segment 230c), for example by depressing the release buttons 530 using the release actuators 550, and then lowered into the volume V of the device body 110, for example via the translating frame member 430. Once the disengaged “n+1” platform segment (e.g. segment 230d) has been displaced vertically below the platform segment to which it was formerly attached, the pinions 382 may be driven in order to retract the transfer platform 250 towards the device body 110, until the “n” intermediate platform segment (e.g. segment 230c) is in a central position where it can be disengaged from an adjacent platform segment. This process may be repeated until transfer platform 250 is fully retracted.
In addition to ‘building out’ the transfer platform 250 from only one side of the device body 110, transfer platforms may be extended (at least partially) from both sides of the device body 110. For example, the first distal platform segment 210 and one or more intermediate platform segments 230a-h may be driven outwardly, and after a second edge of an intermediate segment 230a-h has been connected, the second distal platform segment 220 and one or more intermediate platform segments 230a-h may be driven outwardly, and another intermediate segment 230a-h may be raised and connected.
In the examples illustrated in
With reference to
With reference to
In the illustrated example, the platform extension supports 570a-b are generally rectangular planar support surfaces. It will be appreciated that in one or more alternative embodiments, platform extension supports may be of different shapes and/or may have different surface features. For example, one or more rollers may be provided on an upper surface of a platform extension support.
Also, in the illustrated example, the platform extension supports 570a-b may be manually moved between the positions shown in
In the example embodiments illustrated in
Each transfer platform 250 includes a series of platform segments 290. Each platform segment 290 has a first end 291, a second end 292, and a segment link 810 at each end. As discussed further below, the segment links of adjacent platform segments are pivotally coupled to each other, and can selectively be restrained or ‘locked’ in an aligned position (e.g. in which the platform segments are generally coplanar) to form a relatively rigid articulated transfer platform, and can also be selectively unrestrained or ‘unlocked’ from an aligned position to allow the platform segments to be stored in a relatively compact arrangement when the articulated transfer platform is retracted.
Also shown are platform drive sprockets 620b and 620c, which are driven by motors 390b and 390c, respectively. The platform drive sprocket 620b is connected via a drive belt 671a to a first drive sprocket 680a. The platform drive sprocket 620c is connected via a drive belt 671b to a second drive sprocket 680b. Idlers 623a and 623b are provided in order to control tension on belts 671a and 671b, respectively.
With reference to
As shown in
With reference to
In
With reference to
In the illustrated embodiment, an optional bushing or bearing 825 is provided at the end of the outer fixed shaft member 820. The bushing/bearing 825 may assist in guiding platform segments 290 along the internal track 710.
Each segment link 810 also includes movable shaft members 830 that can be selectively extended outwardly in order to engage apertures 870 in adjacent segment link and thereby restrain the segments in an aligned position (e.g. in which the platform segments are generally coplanar).
In order to move the movable shaft members 830 between an engaged position and an unengaged position, in the illustrated example a pair of end linkage members 862 and 864, and a central linkage member 866 are provided (see e.g.
With reference to
Also shown in the illustrated example is an optional biasing member 845, which in this case is an arced piece of resilient material, such as a steel spring, that biases the engagement projection 868 towards either the first end 841 or the second end 842 of the arcuate slot 840.
With reference to
With reference to
As a segment link is translated inwardly—e.g. as the articulated transfer platform is being retracted—the engagement projection 868 enters the second end 792 of the slot 790. As the segment continues to move inwardly, the engagement projection 868 is urged transversely towards the first end 841 of the arcuate slot 840, which results in the shaft members 830 of that segment link to be moved from an extended position to a retracted position, disengaging shaft members 830 from apertures 870 of the trailing segment link, allowing a greater degree of rotation between adjacent transfer platform segments.
In the illustrated example, the engagement plate 780 and its slot 790 may be characterized as a ‘passive’ actuation system that automatically switches the position of the engagement projection 868 as a segment link 810 passes over the engagement plate 780. In one or more alternative embodiments, the movement of engagement projection 868 may be ‘actively’ actuated, e.g. via a control system of transfer device 100. For example, the slot 790 may be oriented parallel to the direction of travel of segment links 810, and the engagement plate 780 may be moved perpendicular to the direction of travel to selectively switch the position of the engagement projection 868. Providing ‘active’ actuation to allow selective locking and unlocking of segment links 810 may have one or more advantages. For example, it may facilitate maintenance operations and/or device testing, and may allow alternative device operations, e.g. extending a transfer platform with one or more segment links in an unrestrained position.
In this example, a single articulated transfer platform is provided, guided by a continuous internal track 710, that may be extended to either side of the transfer device 100. As can be seen from
Optionally, the transfer device 100 may include one or more transfer belt treatment systems for applying a cleaning and/or disinfecting treatment to the transfer belt 150. For example, an ultra-violet (UV) light emitter (not shown) may be positioned within the device housing to continuously or selectively emit UV light towards an upper surface of the transfer belt 150, or both an upper surface and a lower surface of the transfer belt 150 as it passes by the emitter. Such a configuration may be characterized as an ultraviolet germicidal irradiation system.
Additionally, or alternatively, a fluid chamber (not shown) may be defined within the housing interior, and a fluid agitator (e.g. an ultrasonic agitator) may be provided to continuously or selectively agitate a fluid as the transfer belt 150 passes through the fluid chamber. Such a configuration may be characterized as a fluid agitation system or as an ultrasonic bath system.
Additionally, or alternatively, a brush, sponge, microfiber, or other material (not shown) may be positioned within the housing and in contact with a surface of the transfer belt 150, such that when the transfer belt is advanced or retracted, dirt or debris may be removed from an upper surface of the transfer belt 150, or both an upper surface and a lower surface of the transfer belt 150. Optionally, a reservoir of a cleaning and/or disinfectant fluid (e.g. alcohol, peroxide, bleach, etc.) may also be provided, for dispensing cleaning and/or disinfectant fluid onto the brush, sponge, microfiber, or other material, and/or directly onto the transfer belt 150.
It will be appreciated that for embodiments that include a fluid dispensing apparatus, ‘fluid-proofing’ or at least increased ingress protection may be required for fluid-sensitive parts of the device (e.g. electronics).
In some embodiments, a manual actuator (e.g. a depressible button) may be provided to selectively actuate the transfer belt treatment system to provide one or more treatment agents (e.g. UV light, disinfectant fluid, ultrasonic bath agitation) to the transfer belt 150. For example, the UV light emitter may be configured such that, in response to depression of the manual actuator, it emits UV light for a pre-set period of time (e.g. 10 seconds, 30 minutes), which may be selected based on e.g. the decontamination level required, a distance of the emitter from belt 150, the intensity of light emitted by the emitter, and/or other factors known to those in the art. As another example, the agitator may be configured such that, in response to depression of the manual actuator, it agitates fluid in the chamber for a pre-set period of time (e.g. 10 seconds, 30 minutes), which may be selected based on e.g. the decontamination level required, composition of fluid within the chamber, and/or other factors known to those in the art. Additionally, or alternatively, the transfer belt treatment system may be configured such that one or more treatment agents (e.g. UV light, disinfectant fluid, ultrasonic agitation) are provided at pre-set intervals (e.g. following every transfer operation, every 24 hours) without requiring manual actuation, and/or at a preset time after a transfer operation has been performed.
In some embodiments, there is provided a platform segment treatment system. Similar to the transfer belt treatment system, the platform segment treatment system can include an Ultraviolet (UV) light emitter configured to direct UV light towards at least an upper surface of the one or more successive intermediate platform segments, a fluid emitter configured to direct at least one of a cleaning fluid and a disinfectant fluid towards at least the upper surface of the one or more successive intermediate platform segments, and/or a fluid agitator configured to agitate fluid in a fluid chamber through which the one or more successive intermediate platform segments are configured to pass. In some embodiments, the transfer device controller is operatively coupled to the platform segment treatment system, and the transfer device controller is configured to selectively actuate one or more of the UV light emitter, the fluid emitter, and the fluid agitator concurrently or separately from each other.
As used herein, the wording “and/or” is intended to represent an inclusive-or. That is, “X and/or Y” is intended to mean X or Y or both, for example. As a further example, “X, Y, and/or Z” is intended to mean X or Y or Z or any combination thereof.
It should be noted that terms of degree such as “substantially”, “about” and “approximately” as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. These terms of degree may also be construed as including a deviation of the modified term, such as by 1%, 2%, 5% or 10%, for example, if this deviation does not negate the meaning of the term it modifies.
While the above description describes features of example embodiments, it will be appreciated that some features and/or functions of the described embodiments are susceptible to modification without departing from the spirit and principles of operation of the described embodiments. For example, the various characteristics which are described by means of the represented embodiments or examples may be selectively combined with each other. Accordingly, what has been described above is intended to be illustrative of the claimed concept and non-limiting. It will be understood by persons skilled in the art that other variants and modifications may be made without departing from the scope of the invention as defined in the claims appended hereto. The scope of the claims should not be limited by the preferred embodiments and examples, but should be given the broadest interpretation consistent with the description as a whole.
This patent application claims priority to U.S. provisional patent application No. 63/136,348 filed Jan. 12, 2021, the entire content of which is incorporated by reference herein.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CA2022/050044 | 1/12/2022 | WO |
| Number | Date | Country | |
|---|---|---|---|
| 63136348 | Jan 2021 | US |
