The present invention relates generally to a mobile seat supporting transfer apparatus to be used as a commode/wheelchair adapted for direct transfer patient from a patient support surface at multiple levels to a seat, and for moving the patient in a sitting or a suspended sitting position.
In the prior art, there are transfer apparatus for people that are used to transfer a disabled person to or from a wheelchair.
U.S. Pat. No. 6,547,265 describes a transfer wheelchair including a base frame with integral toileting platform, a seating platform for receiving a human user thereon, and removably attachable structure for supporting a user's torso and arms. The frame has two C-shaped legs, wheels that allow frame to roll along the ground, and supports a toileting platform. The wheelchair apparatus has a seating platform for removably receiving a user on top of the toileting platform.
The invention described in U.S. Pat. No. 6,547,265 is an important development in transferring bedridden patients to the commode-wheelchair that does not require a caregiver to lift the user's entire body during transfer on to or off the chair. At the same time, the patented design of the chair apparatus limits its operational capacity and can be used only on beds with vertical movements at specified mattress height for transfer. Changing seats requires lifting the patient about the existing seat, and the storage and packaging of the chair apparatus are limited by the size of the assembly.
U.S. Pat. Appln. Publ. No. US20170056267A1 describes a transport apparatus for moving a person from one location to another location or transporting a person from one support to another support. The transport apparatus includes a base, a sling, and a support frame mounted to the base and movable between different positions relative to the base.
This apparatus is similar to many existing devices and has common operational procedures: the sling is the seat supporting patient in a suspended sitting position, changing the sling can be done only by removing a first sling and repeating the operation of placing the first seat. The apparatus requires a powered drive, and is expensive with limited operational capacity.
These prior art transfer apparatuses design for limited selective transfer operations, are bulky, do not provide simple transfer patient, seat replacement and also do not enable patient transfer for both support surfaces that are vertically movable as well as support surfaces that are not vertically movable.
The invention, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals identify like elements, and wherein:
Referring to the accompanying drawings wherein like reference numbers refer to the same or similar elements,
Each of the top portion 1 and bottom portion 2 has a design of two 90-degree positioning bars, as an elongate bar 8, 9, 11, 12 and the short bars. The elongate bars 8, 9, 11, 12 are preferably built as 90 degree bent tubes and are connected with a cross bar.
The cross bar can be length adjustable and have different configurations. Elongate bars 8 and 9 and 11 and 12 form a horizontal part of the top portion 1 and bottom portion 2, respectively. The vertical parts of the 90 degrees bended tubing of the top and bottom portions 1, 2 are adapted for secure connection with the removable spacers 3. The elongate bars 8 and 9 form a seat support 4 for the seat 5. The bottom portion 2 is a wheeled base, adapted for removable attachment of pairs of wheels 13, 14, and 15, wherein the wheels 13 are front, wheels 14 are back or rear, and wheels 15 are positioned between wheels 13 and 14, intermediate wheels.
The spacers 3 design to connect the top portion 1 and bottom portion 2 of the “C” frame assembly and position the seat support 4 to support and move seat 5 with a sitting patient 6 at one of many selectable heights. The spacers 3 can be length-adjustable or have a selected length.
The cross bar can be removably connected to the bended tubing and be length adjustable. The elongate bars 8, 9, 11, 12 can have removable adjustable extensions attached to the ends of the elongate bars 8, 9, 11, 12 to accommodate different size patient.
The removable bar 10 may be attached to the elongate bars 8 and 9 for seat support 4 reinforcement. The removable bar 10 may be attached to the elongate bars 8 and 9 after the patient 6 is in a sitting position on the seat 5 supported by a mattress 7 which is an example of a patient support surface (see
As was described above, the C/W assembly as a seat transfer apparatus can be used as a commode or as a wheelchair. The difference between commode and wheelchair is a seat 5, where the seat for the commode is provided with an opening to use the toilet or the bedpan.
In
In
The “C” shaped frame assembly of the second C/W model can be designed as the first C/W model, shown in
With the ability to adjust the height of the seat 5 and thus the seat position by adjusting the length of the links 17, the design of the “C” shaped frame assembly can be simplified by build it as two “C” shape side frames connected with one or more fixed or length adjustable cross bars. For packaging and storage vertical bars can be cut and connected by a spacer 3,
The top horizontal bars form the seat support 4 and are adapted for removable connection to links 17, supporting seat 5 and removable bar 10, where the bottom horizontal bars are part of the wheeled base.
It will be understood by those skilled in the art how to design the solid vertical “C” shaped sides frame, with a modification of the connection by a spacer.
Operations of Patient Transfer.
1. Transfer a Patient on a Bed with Vertical Movement.
The operation includes transferring a patient from a supine position directly to a sitting position on the seat 5 and moving the patient in a suspended sitting position above or away from the bed.
The C/W moves over the mattress 7 at the potential patient sitting position, where the potential sitting position is the patient's position on the mattress 7 after he rolled from a lying to a sitting position on the mattress 7. The mattress 7 moves up to transfer the patient onto the seat 5. After the patient transfer, the bed is moved down, and the C/W moves away from the bed.
2. Operation of Using the Bedpan Over the Bed in a Sitting Position.
Referring to
For patient repositioning on the support surface 7 with vertical movements, the wheeled base comprises only front 13 and rear 14 pairs of wheels,
3. Operation of Transferring a Patient Over on a Bed without Vertical Movement
To move seat support 4 over the mattress, the wheeled base comprising all three pairs of wheels 13, 14, and 15.
The pre-set front wheels 13 are positioned at height “B” above the floor, the intermediate wheels 15 are positioned on the distance “A” off the center of gravity C/G, and the rear wheels 14 are attached to the ends of the elongate bars 11 and 12.
The set-up of wheels 13 and 15 defines the angle and force to move the “C” shaped frame assembly with sitting patient.
The “C” shaped frame assembly, with or without a patient, can be moved over the mattress 7 and turned to the horizontal position shown in
For a short travel distance, the “C” shaped frame assembly with patient can be moved in vertical position on the sets of wheels 14 and 15. For a long travel distance, it is preferable to lower the front wheels 13 to the floor or ground.
The pair of front wheels 13 is designed for fast and simple move on or above the floor. 4. Seat Replacement Under the Patient in a Seating Position on the First C/W Model.
Referring to
5. Seat Replacement Under the Patient in a Suspended Sitting Position.
The presented descriptions below are only demonstrations of the concept and some practical applications, and do not limited the invention or the scope of the claims.
The seat 5 is configured as a set of a first seat 25 and a second seat 26, removably connected to the seat support 4 with removable attached links 27 and 28, respectively.
The first seat 25 is used like a regular single-layer seat 5 described in
The first seat 25 is preferably fabricated from a strong, soft and thin material, and as an example, it can be material suitable for fabricating a sling to support and transfer a patient in a suspended position, for example, plastic or other similar material.
The second, underlying replaceable seat 26 is removably attached to the seat support 4 by links 28 which are shorter than links 27 connecting the first seat 25 to the seat support 4. Connecting the second seat 26 to the seat support 4 enables release of tension on the first seat 25.
The second seat 26 can have different shapes, thickness, and design for patient comfort. The second seat 26 utilizes different requirements to be used as a seat for a commode or wheelchair with varying levels of patient comfort, or medical procedures or requirements.
The manner in which the first seat 25 and the second seat 26 are attached to the “C” shaped frame assembly is designed depends on the source of vertical power and presented in diagrams in
For better demonstration, the presentations are made using the second model of the C/W, wherein the first and second seats 25 and 26 are attached to the seat support 4 via flexible links.
Second Seat Replacement Under the Patient in a Sitting Position on Beds with Vertical Movements
Position 1 (POS 1)—the first seat 25 with a sitting patient 6 are connected by links 27, in a tension-free state, to the seat support 4, positioned over the bed.
Position 2 (POS 2)—the mattress 7 is moved down so that the links 27 support the first seat 25 in a tensioned state, and space for the second seat 26 is created. The second seat 26 is placed on the mattress 7.
Position 3 (POS 3)—the mattress 7 is moved up, the first seat 25 is resting on the second seat 26, and links 28 are connected to the seat support 4. The links 27 and 28 are in a tension-free state, i.e., tension has been released.
Position 4 (POS 4)—by moving the mattress 7 down, the second seat 26 connected to the seat support 4 with links 28 takes over support of the patient, and releases tension on the first seat 25 via the links 27.
To replace the second seat 26, mattress 7 is moved up. Links 27 are connected to the seat support 4, and the second seat 26 is disconnected from the links 28. By moving the mattress 7 down, the second seat 26 can be replaced.
Second Seat Replacement Under the Patient Supported by a Patient Support Surface without Vertical Movement or in a Suspended Sitting Position.
Removable attachment support 29 is positioned on the seat support 4. Links 27 removably connect the first seat 25 to the support 29. The links 28 removably connect the second seat 26 to the seat support 4.
The stages of the seat replacement are as follows:
Position 1 (POS 1)—the first seat 25 with sitting patient 6 on the mattress 7, the support 29 rests on the top of the seat support 4 and the links 27 connect the first seat 25 to the support 29.
Position 2 (POS 2)—vertical force is applied to the support 29 to lift the support 29 with attached first seat 25, creating space for positioning and connecting the second seat 26 to the seat support 4 via links 28.
Position 3 (POS 3)—the support 29 moves down, the first seat 25 rests on the second seat 26, and the support 29 seats on the seat support 4.
The source of the vertical movement of the support 29 can be any powered or manual lifting mechanisms or systems.
Seat Replacement Under the Patient by Using Length Adjustable Connecting Links.
The mechanically length adjustable connecting links are links 30 incorporating one of many strap Tie-down System 31 or others devices generating power to shortening or extend length of the connection.
The stages of the seat replacement are as follows:
Position 1 (POS 1)—the first seat 25 with the sitting patient is connected to the seat support 4 via removable length adjustable links (referred to as adjustable connection means) 30.
Position 2 (POS 2)—by using length adjustable devices 31, the links 30 lift the first seat 25 allowing connection the second seat 26 via links 28 to the seat support 4.
Position 3 (POS 3)—by loosening belts 30 by device 31, the second seat 26 takes over support of the patient and the first seat 25. The first seat 25, relieved from a tensioned state, will stay under the patient and the second seat 26.
The length adjustable links can be used on a single layer seat or a seat assembly which is a set of two seats (as described above) used to transfer a patient between different support surfaces with and without vertical movements.
The foregoing described seat replacements are effortless, safe, simple and can be used in many devices by a single caregiver.
The seat support 4 in combination with the first and second seats 25, 26 creates a valuable opportunity for patient comfort to enable a garment to be put on and removed from the patient in a suspended sitting position. The garment (for example, pants, underwear, skirt or the like) is provided with an opening for the links supporting the first seat 25 so that it can be easily be placed or removed over the first seat 25.
Another aspect of the invention relates to the frame reinforcement. Different parts of the “C” shape frame are under different stress loads. For the “C” shaped frame assembly, it is possible to use tubular constructions in order to make the whole structure lightweight, and the portion of the “C” shaped frame assembly's tubes under greater stress may be reinforced by placing inserts 36 inside the tubes 35 and bending them together if needed.
It is obvious, that apparatus adapted to accept varieties of patient supports, existing in industry, providing secure and comfortable patient repositioning.
The “C” shaped frame assembly is a mobile, compact, rigid construction, without moving mechanical part structure, and adapted for simple and quick positioning seat and removable components to perform multi-functional operations providing secure and comfortable for the patients and caregivers.
The “C” shaped frame assembly may be designed as an assembly of components which is compact in service, storage and packaging.
While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and, therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.
Number | Name | Date | Kind |
---|---|---|---|
2710975 | Stoen | Jun 1955 | A |
3272453 | Hallock | Sep 1966 | A |
3373453 | Goodman | Mar 1968 | A |
5255934 | Wilson | Oct 1993 | A |
5526537 | Conrad | Jun 1996 | A |
5704439 | Kitahama | Jan 1998 | A |
5725275 | Wigfall | Mar 1998 | A |
6154899 | Brooke et al. | Dec 2000 | A |
6176508 | Malassigne et al. | Jan 2001 | B1 |
6185769 | Larisey, Jr. et al. | Feb 2001 | B1 |
6418571 | Cheng | Jul 2002 | B1 |
6547265 | Enge | Apr 2003 | B1 |
7520518 | Peterson | Apr 2009 | B2 |
9393167 | Ganel | Jul 2016 | B2 |
9820901 | Brown | Nov 2017 | B2 |
10292880 | Chang | May 2019 | B2 |
20040093673 | Marshall | May 2004 | A1 |
20050104319 | Wing | May 2005 | A1 |
20060048296 | Sutou | Mar 2006 | A1 |
20070124859 | Stryker et al. | Jun 2007 | A1 |
20100154115 | Wernqvist | Jun 2010 | A1 |
20140208493 | Ahmed | Jul 2014 | A1 |
20150272797 | Hines | Oct 2015 | A1 |
20170056267 | Stryker et al. | Mar 2017 | A1 |
20170252259 | Evans | Sep 2017 | A1 |
20190350411 | Hart et al. | Nov 2019 | A1 |
Number | Date | Country | |
---|---|---|---|
62866769 | Jun 2019 | US |