Various embodiments of the present invention pertain to apparatus and method for altering the position of an articulating panel, and in some embodiments to varying the deployed configuration of a wheelchair ramp.
One aspect of the present invention pertains to an apparatus for providing wheelchair access. Some embodiments include a support frame. Other embodiments include three substantially flat panels hinged together along a single axis. Yet other embodiments include an actuator having a first member movable relative to a second member, with one of the first member or second member being coupled to the support frame and the other of the first member or the second member being coupled to one of the panels; and a sensor for sensing the relative position of the frame relative to the one panel.
Another aspect of the present invention pertains to a multiwheeled ground vehicle. Some embodiments include a frame. Other embodiments include four wheels each supporting the frame from the ground by a suspension system, each suspension system including a spring in at least a portion of the load path from the corresponding wheel to the frame. Other embodiments include a sensor providing an electronic signal responsive to the inclination of the frame, a deployable wheelchair assembly attached to the frame, the assembly being deployable from a stowed position within the vehicle to a deployed position extending out of the vehicle and in contact with the ground; and a controller receiving the signal and operable connected to the assembly for control of the assembly between the stowed position and the deployed position.
Still another aspect of the present invention pertains to a method for deploying a wheelchair access assembly from a ground vehicle. Some embodiments include providing a deployable wheelchair assembly coupled to a frame, and deployable from a stowed position within the vehicle to a deployed position extending out of the vehicle, an electronic sensor providing a signal, a suspension system actuatable to change the inclination of the vehicle. Other embodiments include sensing with the sensor the inclination of the frame relative to the ground. Yet other embodiments include commanding the assembly to deploy, actuating the suspension system to change the inclination of the frame; and using the signal and moving the frame to a more level inclination.
Yet another aspect of the present invention pertains to a kit for retrofitting a transit bus. Some embodiments include a frame. Other embodiments include a structural member hinged to the frame and pivotal relative to the frame. Yet other embodiments include an actuator attached to the member and actuatable for pivoting the member relative to the frame. Still other embodiments include a multisection folding wheelchair ramp, the ramp being attached to the member; and an electronic sensor providing a signal corresponding to the position of a section of the ramp.
Yet another aspect of the present invention pertains to an apparatus. Some embodiments include a transit bus having a frame. Other embodiments include a multisection deployable wheelchair ramp pivotally coupled to the frame, the fully deployed sections of the ramp capable of being used for wheelchair ingress and egress over a plurality of angular relationships. Other embodiments include means for deploying the ramp from the vehicle; and means for pivoting one section of the ramp relative to another section of the ramp over a range of angular relationships.
It will be appreciated that the various apparatus and methods described in this summary section, as well as elsewhere in this application, can be expressed as a large number of different combinations and subcombinations. All such useful, novel, and inventive combinations and subcombinations are contemplated herein, it being recognized that the explicit expression of each of these combinations is unnecessary.
Some of the figures shown herein may include dimensions. Further, some of the figures shown herein may have been created from scaled drawings or from photographs that are scalable. It is understood that such dimensions, or the relative scaling within a figure, are by way of example, and not to be construed as limiting.
The following is a list of element numbers and at least one word used to describe that element. It is understood that none of the embodiments disclosed herein are limited to these words, and these element numbers can further pertain to other words that would be understood by a person of ordinary skill reading and reviewing this disclosure in its entirety.
For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates. At least one embodiment of the present invention will be described and shown, and this application may show and/or describe other embodiments of the present invention. It is understood that any reference to “the invention” is a reference to an embodiment of a family of inventions, with no single embodiment including an apparatus, process, or composition that should be included in all embodiments, unless otherwise stated. Further, although there may be discussion with regards to “advantages” provided by some embodiments of the present invention, it is understood that yet other embodiments may not include those same advantages, or may include yet different advantages. Any advantages described herein are not to be construed as limiting to any of the claims. The usage of words indicating preference, such as “preferably,” refers to features and aspects that are present in at least one embodiment, but which are optional for some embodiments.
The use of an N-series prefix for an element number (NXX.XX) refers to an element that is the same as the non-prefixed element (XX.XX), except as shown and described thereafter. As an example, an element 1020.1 would be the same as element 20.1, except for those different features of element 1020.1 shown and described. Further, common elements and common features of related elements are drawn in the same manner in different figures, and/or use the same symbology in different figures. As such, it is not necessary to describe the features of 1020.1 and 20.1 that are the same, since these common features are apparent to a person of ordinary skill in the related field of technology. This description convention also applies to the use of prime (′), double prime (″), and triple prime (′″) suffixed element numbers. Therefore, it is not necessary to describe the features of 20.1, 20.1′, 20.1″, and 20.1′″ that are the same, since these common features are apparent to persons of ordinary skill in the related field of technology.
Although various specific quantities (spatial dimensions, temperatures, pressures, times, force, resistance, current, voltage, concentrations, wavelengths, frequencies, heat transfer coefficients, dimensionless parameters, etc.) may be stated herein, such specific quantities are presented as examples only, and further, unless otherwise noted, are approximate values, and should be considered as if the word “about” prefaced each quantity. Further, with discussion pertaining to a specific composition of matter, that description is by example only, and does not limit the applicability of other species of that composition, nor does it limit the applicability of other compositions unrelated to the cited composition.
What will be shown and described herein, along with various embodiments of the present invention, is discussion of one or more tests that were performed. It is understood that such examples are by way of examples only, and are not to be construed as being limitations on any embodiment of the present invention. It is understood that embodiments of the present invention are not necessarily limited to or described by the mathematical analysis presented herein.
Various references may be made to one or more processes, algorithms, operational methods, or logic, accompanied by a diagram showing such organized in a particular sequence. It is understood that the order of such a sequence is by example only, and is not intended to be limiting on any embodiment of the invention.
In one preferred embodiment, bus 10 includes a suspension system 12 in which the cab and passenger compartment are supported by air springs 14. Bus 10 includes an electronic controller 80 that operates a pneumatic system for selectively inflating or deflating any one of the four air springs 14. In
Assembly 20 includes an OEM wheelchair ramp assembly that is adapted and configured to mount to the frame of a vehicle. In one embodiment, the invention includes a kit having a plurality of support members, an actuation system, sensors, a controller, and software that can readily be adapted to interface with existing wheelchair ramps and wheelchair lifts. However, a single configuration of a wheelchair ramp will be shown and described, along with the interfacing kit that adapts the OEM ramp to a transit bus 10. It is understood that with adaptations to the kit, many different types of ramps and lifts can be accommodated and attached to a vehicle.
Ramp assembly 20 is shown attached to a frame member 18 by way of a ramp support plate 40. Support plate 40 includes a bed plate 42 that is connected by way of hinge 26 to a frame member 18. A panel 21 of the wheelchair ramp is coupled to bed plate 42 by way of a pair of side clamps 43 that extend laterally outward along the edges of panel 21. In some embodiments, support plate 40 is hingedly connected to a frame rail 18 that is proximate to, but preferably inboard of the vehicle centerline. However, in yet other embodiments the hinged connection of plate 40 to frame 18 can occur anywhere along frame 18 that is aligned with a door, including doors for side and rear entrance.
Still further, it can be seen that the angular relationship between the floor of the passenger compartment (as represented by the top of frame member 18 in
It is understood that even though a specific configuration of a tray 32 will be shown and described, it is understood that any manner of support can be provided to react the panel level forces that will be shown and described.
Various embodiments of the present invention include an actuation system 50 that can adjust the angular relationship (and also the vertical distance) between plate 21 and tray 32. For those embodiments that include a static support system 30 not having a tray, it is understood that actuation system 50 applies a force to ramp 21 that varies at least one of the following included angles; between panel 21 and 22; or between panel 21 and the floor of the vehicle.
As expressed in the embodiment depicted in
Further, it is understood that although reference will be made to adjusting position of panel 21, still further embodiments pertain to adjusting the position of panel 22 or panel 21. Still further, various embodiments pertain to ramp assemblies having fewer than three panels or more than three panels, and further those embodiments in which at least one of the panels is attached to a wheelchair lifting support.
As best seen in
As ball screw actuator 52.1 extends, actuated platform 58 is pushed further away from the vehicle. Because of the geometry of coupling link 56, this increased distance causes coupling link 56 to become more vertically oriented (in contrast to the position of link 56 in
Some embodiments of the present invention include one or more gas struts 54 that assist in operation of actuator 52. As one example, gas struts 54 are biased to the extended position, thus biasing platform 58 away from vehicle 18. In one embodiment, each gas strut 54 provides a biasing force of about 100 pounds. Note that gas struts 54 are adapted and configured to provide an assisting force during deployment of the panels of the ramp assembly, and further to provide a resisting force to the stowing of the panels. In some embodiments, some portions of the act of stowing the panel are gravity-assisted, and such panel weight is supported by the gas struts as they compress.
Algorithm 90 as shown in
Inclination sensor 64 provides an electronic signal corresponding to the inclination of the sensor (and vehicle frame) relative to gravity in one or two directions. In some embodiments, the inclination is measured on a left to right (roll) basis, whereas in other embodiments the inclination is measured on a fore and aft (pitch) basis. In still further embodiments, the inclination sensor operates along two axes, and provides both roll angle and pitch angle information.
After the vehicle is parked, the driver actuates 90.3 an electronic controller to level the vehicle as best as possible. Preferably, transit bus 10 is supported by a suspension system 12 at each wheel that includes an airspring 14. With act 90.3 an electronic controller applies a leveling algorithm to achieve a position of the vehicle frame that is within a range of acceptable angular offsets. As one example, in some embodiments, the inclination sensor 64 measures the roll angle of the vehicle, especially for those vehicles that are parked on a roadway that is crowned. In such a parked configuration, the left side of the vehicle can be higher than the right side of the vehicle (since the crown at the middle of the road is higher than at the outer edge of the road). Such a situation is detected by the on-board controller in response to receiving the signal from sensor 64. The electronic controller will inflate one or more right side air springs 14 and deflate one or more left side air springs 14. Likewise, for a vehicle parked as a pitch angle, electronic controller will inflate or deflate the front air springs 14 relative to the rear air springs 14.
It is understood that any such inflation or deflation can only be accomplished within limits pertaining to parameters such as the acceptable range of air spring pressures, the range of suspension travel before jounce or rebound stops are reached, the steering angle of the front wheels, and similar factors. Because of all of these constraints, act 90.3 may not be able to achieve a level vehicle. In such cases act 90.3 achieves the best level state possible.
With the vehicle level, the driver can open the passenger door 16 as shown in
In some embodiments, wheelchair ramp assembly 20 comprises first, second, and third panels (21, 22, and 23, respectively), each of which is hinged together. In such embodiments the ramp assembly 20 unfolds from its stowed position to the deployed position, as seen in
However, because of the uncertainties in the inclination of the vehicle and further in the distance from the frame panel hinge 26 to the outside surface 7, it is possible that the first, second, and third panels 21, 22, and 23 are not in a straight line. In such a condition, as best seen in
When ramp assembly 20 is fully deployed, a sensor on the assembly indicates to an electronic controller that the unfolding process is complete. After completion, electronic controller 80 measures the angular relationship between panels 21 and 22 by means of an angular position sensor 60. Sensor 60 has a first member that moves with the motion of panel 21 and a second member that moves with the movement of second panel 22, provide a signal corresponding to relative panel movement. Sensor 60 determines the angular difference between its two members, and provides an electronic signal to controller 80.
In some embodiments, angular position 60 is a Hall Effect sensor, which magnetically senses the relative angular position of panels 21 and 22. However, it is understood that any kind of sensor can be used, including, by way of example, one or more radiation sources (such as LEDs), the radiation of which is received by one or more detectors; a variable resistor, the resistance of which is an indication of the included angle between panels 21 and 22; one or more contact switches which are located to make or break contact when the relative angular position is within certain boundaries; two inclination sensors, the difference between which is a measure of panel relative angle; and others. It is understood that position sensor 60 can transduce the relative angular position of panels 21 and 22 in any manner.
In some embodiments, there is further an angular position sensor that provides a visual indication of angular position for the driver or passenger. As one example, the mating hinged parts of panels 21 and 22 can each include one or more tick lines spaced apart, the alignment of which indicates an acceptable included angle.
Controller 80 receives a signal from sensor 20 corresponding to a ramp angle, and determines whether or not that angle is within an acceptable range. Preferably, the angle should be 180 degrees, or substantially flat. However, it is understood that for purposes of providing hysteresis and eliminating hunting by the control system, that there can be a range of acceptable angles, such as from 178 degrees to 182 degrees. Further, it is understood that in some embodiments the electronic controller does not attempt to achieve a flat condition between panels 21 and 22, but rather attempts to achieve a best possible angle between these two panels.
If the ramp angle is not acceptable, then act 92.3 includes the actuation of system 50 to provide an acceptable ramp angle 42. In one embodiment, system 50 includes a ball screw actuator 52, one end of which is coupled to static support 30 (or alternatively, to frame 18), the other end of which is coupled to link 56. Electronic controller 80 drives actuator 50 to move link 56, and thereby adjusts the relative angle 42 between panels 21 and 22 until an acceptable angular position is read from sensor 60. The leveled ramp can be seen in
Once ramp angle 42 is within an acceptable range, electronic controller 80 then reads a signal from ramp inclination sensor 62 that corresponds to the inclination of one or more panels relative to the Earth's gravity field. Controller 80 determines if the measured inclination is within acceptable limits in act 92.5. If the inclination is within acceptable limits, then controller 80 communicates an acceptable condition of the ramp to the driver and passengers by way of one or more enunciators 66 or 68. Passengers can then disembark.
If the ramp inclination is too steep, then one or more enunciators 66 or 68 relay this information to the driver or passengers, indicating that passengers should not leave the vehicle on their own. In such cases the driver leaves the driver's seat, comes over to the side door 16, and manually helps the passenger traverse the deployed ramp.
In yet other embodiments, ramp assembly 20 and transit bus 10 include one or more means for manually adjusting the position of one or more of the ramp panels. For example, such a system can include a mechanical jacking mechanism to support one or more panels relative to the ground. In yet other embodiments, the panel hinges can include a ratcheting lock that permits manual adjustment of one panel relative to another panel, with a ratcheting device holding that position constant as the passenger exits the vehicle. In such cases, ramp assembly 20 can include a visual or manual method for determining inclination, such as a rotating weight that swing to a position within a marked housing, the difference between the end of the swinging pendulum and the markings of the housing being an indication of the inclination of the particular panel.
Panel 121 is supported by a ramp support assembly 140. Panel 121 is coupled to support assembly 140 by a pair of clamps 143 that extend along the edges of panel 121. Support assembly 140 further includes a bed plate 142 that receives support clamps 143, and hingedly connects to frame 18 of bus 10 by way of hinge 126
It is understood that support assemblies 40 and 140 provide an interface between a transit bus and a plurality of different configurations of wheel chair ramps and lifts. Bed plates 42 and 142 in some embodiments, incorporate a plurality of fastener types and fastener locations that can accommodate different configurations of side clamps 43 and 143, respectively. In this manner, a vehicle 10 can be modified with a bed plate 42 or 142, and then interface with different wheelchair ramps or lifts as desired by the bus operator.
As best seen in
Referring to
Frame 18 has been modified to remove a portion of the length of several lateral members 18b, and to further include a hinge support member 18e that is oriented generally longitudinally. In some embodiments, longitudinal member 18e is the same as hinge support member 235, although in yet other embodiments member 18e is a member within frame 18 with bed plate 342 being hingedly coupled to member 18e.
Various aspects of different embodiments of the present invention are expressed in paragraphs X1, X2, X3, X4, and X5 as follows:
X1. One aspect of the present invention pertains to an apparatus for providing wheelchair access. The apparatus preferably includes a support frame; three substantially flat panels hinged together along a single axis; an actuator having a first member movable relative to a second member, with one of the first member or second member being coupled to said support frame and the other of said first member or said second member being coupled to one of said panels; and a sensor for sensing the relative position of said frame relative to said one panel.
X2. Another aspect of the present invention pertains to a multiwheeled ground vehicle comprising a frame; four wheels each supporting said frame from the ground by a suspension system, each suspension system including a spring in at least a portion of the load path from the corresponding wheel to said frame; a sensor providing an electronic signal responsive to the inclination of said frame; a deployable wheelchair assembly attached to said frame, said assembly being deployable from a stowed position within the vehicle to a deployed position extending out of the vehicle and in contact with the ground; and a controller receiving the signal and operable connected to said assembly for control of said assembly between the stowed position and the deployed position.
X3. Yet another aspect of the present invention pertains to a method for deploying a wheelchair access assembly from a ground vehicle, comprising: providing a deployable wheelchair assembly coupled to a frame, and deployable from a stowed position within the vehicle to a deployed position extending out of the vehicle, an electronic sensor providing a signal, a suspension system actuatable to change the inclination of the vehicle; sensing with the sensor the inclination of the frame relative to the ground; commanding the assembly to deploy; actuating the suspension system to change the inclination of the frame; and using the signal and moving the frame to a more level inclination.
X4. Still another aspect of the present invention pertains to a kit for retrofitting a transit bus, comprising: a frame; a structural member hinged to said frame and pivotal relative to said frame; an actuator attached to said member and actuatable for pivoting said member relative to said frame; a multisection folding wheelchair ramp, said ramp being attached to said member; and an electronic sensor providing a signal corresponding to the position of a section of said ramp.
X5. Still another aspect of the present invention pertain to an apparatus, comprising: a transit bus having a frame; a multisection deployable wheelchair ramp pivotally coupled to said frame, the fully deployed sections of said ramp capable of being used for wheelchair ingress and egress over a plurality of angular relationships; means for deploying said ramp from said vehicle; and means for pivoting one section of said ramp relative to another section of said ramp over a range of angular relationships.
Yet other embodiments pertain to any of the previous statements X1, X2, X3, X4 or X5, which are combined with one or more of the following other aspects. It is also understood that any of the aforementioned X paragraphs include listings of individual features that can be combined with individual features of other X paragraphs.
Wherein said sensor provides an electronic signal corresponding to the relative angular position.
Wherein the other member is coupled to the middle panel.
Wherein the other member is coupled to one of the end panels.
The apparatus or method of any of the above claims wherein the support frame is the frame of a vehicle.
Wherein the support frame is adapted and configured to be attached to the ladder frame of a vehicle.
Wherein said sensor is located proximate to the driver's seat.
Wherein said sensor is attached to said frame.
Wherein said sensor is located in the cab of the vehicle.
Wherein said springs are air springs.
Wherein said assembly is a wheelchair lift.
Wherein said assembly is a foldable wheelchair ramp.
Wherein said assembly is a sliding wheelchair ramp.
Wherein the inclination of said frame is relative to the gravity field of Earth.
Wherein the inclination of said frame is relative to at least one of said wheels.
Wherein said actuating is automatic in response to said commanding.
Wherein said actuating is performed by the vehicle operator.
Wherein said sensing and said using is by an electronic controller.
Wherein the suspension system is an air spring suspension system, and said actuating is by changing the air pressure with one of the air springs.
Which further comprises preventing said actuating unless the vehicle is placed in park.
Wherein said member is hinged to one end of said frame and said actuator is pivotally coupled to said member and spaced apart from the hinged attachment.
Wherein the other end of said actuator is attached to said frame.
Wherein said sensor provides a signal corresponding to the position of one section of said ramp relative to another section of said ramp.
Wherein said sensor provides a signal corresponding to the angular relationship of one section of said ramp relative to another section of said ramp.
Wherein said frame has a width that is greater than or about equal to the folded length of said ramp.
Which further comprises a software algorithm for using the signal to control the actuator.
Which further comprises means for supporting the pivoted sections within the range of angular relationships.
Wherein said supporting means and said pivoting means utilize the same actuator.
Wherein said pivoting means uses a first actuator to vary the relative pivoting and said The apparatus or method of any of the above claims supporting means uses a locking actuating lockable at any of a plurality of discrete locations within the range of angular relationships.
Which further comprises a sensor providing a signal corresponding to the inclination of said frame relative to gravity.
Which further comprises a sensor providing a signal corresponding to the relative relationship of one section relative to another section.
While the inventions have been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only certain embodiments have been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected.
This application claims the benefit of priority to U.S. Provisional Patent Application Ser. No. 61/762,064, filed Feb. 7, 2013, and U.S. Provisional Patent Application Ser. No. 61/783,637, filed Mar. 14, 2013, both of which are incorporated herein by reference.
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