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Title:
AN ADJUSTABLE WHEELCHAIR SEAT CUSHION APPARATUS
Document Type and Number:
WIPO Patent Application WO/2020/201805
Kind Code:
A4
Abstract:
An adjustable wheelchair seat cushion apparatus including a resilient thermoplastic honeycomb seat cushion member and a pivotally attached base member forming a planar base upon which the upper cushion member will rest when folded about the pivot to engage and lay thereupon. Positioned upon the base member and disposed between it and the overlying cushion member are user or therapist positionable, prescriptively sized and shaped pelvic obliquity elements, pommels and/or wedges operative to deform the cushion member when engaged therewith.

Inventors:
WILSON SUSAN L (US)
LANDI CURTIS L (US)
Application Number:
IB2019/001463
Publication Date:
January 21, 2021
Filing Date:
September 26, 2019
Export Citation:
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Assignee:
SUPRACOR INC (US)
International Classes:
A47C31/00; A47C16/00; A47C20/02; A47C27/08; A61G5/10; B68G5/00
Attorney, Agent or Firm:
HAMRICK, Claude A.S. (US)
Download PDF:
Claims:
1

AMENDED CLAIMS

received by the International Bureau on 29.1 1 .2020

CLAIMS

We claim:

1 .(Cancelled)

2. An adjustable anatomical support and seat cushion apparatus for wheelchairs, comprising: a generally rectangular, resilient seat cushion member having top and bottom surfaces, front and back surfaces, and left and right side surfaces; a generally rectangular, planer base member disposed beneath said seat cushion member and having planer top and bottom surfaces bounded by front and back edges and left and right side edges, said back edge being pivotally connected to said back surface of said seat cushion member; said seat cushion member being rotatable about the pivotable connection between a non-parallel disposition relative to said planer base member, and a parallel disposition relative to said planer base member; a plurality of prescriptively sized and shaped pelvic obliquity elements, pommel elements and/or wedge elements affixed to said planer top surface of said planer base member generally facing the bottom surface of said seat cushion member, said pelvic obliquity elements, pommel elements and/or wedge elements being operative to engage and deform said seat cushion member when said seat cushion member is rotated about the pivotable connection from said non-parallel disposition relative to said planer base member into said parallel disposition relative to said planer member, and means for maintaining said seat cushion member in said parallel disposition relative to said planer base member. 2

3. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 2, wherein said means for maintaining includes a cover means removably disposed about the assembly including said seat cushion member, said pelvic obliquity elements, pommel elements and/or wedge elements, and said planer base member when said seat cushion member is rotated about the pivotable connection from said non-parallel disposition relative to said planer base member into said parallel disposition relative to said planer member.

4. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 3 wherein said cover means includes an opening for allowing said assembly to be inserted into said cover means, and closure means disposed about said opening for allowing said assembly to be closedly enveloped within said cover means.

5. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 2 wherein said seat cushion member is made of a cellular

thermoplastic honeycomb material.

6. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 5 wherein at least some of the cell walls of said cellular

thermoplastic honeycomb material are perforated.

7. An adjustable anatomical support and seat cushion apparatus for wheelchairs, comprising: a generally planer, rectangular base member having a first planform with a back edge, a front edge and left and right-side edges respectively connecting said front and back edges; 3

a generally rectangular and resilient seat cushion member having a second planform substantially congruent with said first planform and disposed in overlying relationship to said planer base member, said seat cushion member being pivotally attached along a back edge thereof to said back edge of said planer base member and rotatable between a non-parallel disposition relative to said planer base member and a parallel disposition relative to said planer base member; a plurality of variously sized and shaped seat cushion deforming elements affixed to a surface of said planer base member generally facing said seat cushion member, said cushion deforming elements being operative to engage and deform said seat cushion member when said seat cushion member is rotated about the pivotable attachment from said non-parallel disposition relative to said planer base member into said parallel disposition relative to said planer base member; and means for selectively securing the deformed seat cushion member to said planer base member.

8. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 7 wherein said means for selectively securing includes a cover means removably disposed about said seat cushion member, said planer base member and said cushion deforming elements when said seat cushion member is disposed in parallel disposition relative to said planer base member.

9. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 7 wherein at least one of said seat cushion deforming elements is a pelvic obliquity element and is disposed on and secured to said planer base member in a position proximate said back edge and one of said side edges thereof.

10. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 7 wherein at least one of said seat cushion deforming elements is a pommel element and is disposed on and secured to said planer base member in a 4

position proximate said front edge and midway between said side edges thereof.

1 1 . An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 7 wherein at least one of said seat cushion deforming elements is a wedge element and is disposed on and secured to said planer base member in a position proximate said front edge and one of said side edges thereof.

12. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 7 wherein said seat cushion member has a first resiliency, and said planer base member has a second resiliency substantially stiffer than said first resiliency.

13. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 7 wherein said seat cushion member and said planer base member are each made of at least one layer of thermoplastic elastomeric honeycomb material, and the pivotal attachment of said seat cushion member to said planer base member is made by thermo-compression bonding at least a portion of the back edge of said seat cushion member to at least a portion of said back edge of said planer base member.

14. An adjustable anatomical support and seat cushion apparatus for wheelchairs, comprising: a resilient seat cushion member having a user supporting top surface with a generally rectangular planform and a corresponding rectangular bottom surface generally parallel to said top surface, said seat cushion member being made of material having adjustable, generally uniform resiliency characteristics across said user supporting top surface; pivot means; 5

a generally rectangular, planer base member disposed beneath said seat cushion member and having a planform substantially congruent with that of said seat cushion member, said planer base member having a top surface generally facing the bottom surface of said seat cushion member and an edge thereof pivotally affixed by said pivot means to a corresponding part of said seat cushion member, said seat cushion member being rotatable about said pivot means between a non-parallel disposition relative to said planer base member and a parallel disposition relative to said planer base member; a plurality of prescriptively defined seat cushion deforming elements selectively affixed to predetermined areas of the top surface of said planer base member, said cushion deforming elements being operative to engage and deform said seat cushion member when said seat cushion member is rotated about said pivot means from said non-parallel disposition relative to said planer base member into said parallel disposition relative to said planer base member thereby changing the user support characteristics of said seat cushion member across its user supporting surface; and cover means adapted to envelope said seat cushion member, said cushion deforming elements and said planer base member when said seat cushion member and said planer base member are disposed in said parallel disposition thereby maintaining the changed user support characteristics of said seat cushion member.

15. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 14 wherein at least one of said seat cushion member and said planer base member are made of at least one layer of cellular thermoplastic elastomeric honeycomb material.

16. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 15 wherein at least some of said prescriptively defined seat 6

cushion deforming elements are selected from the group consisting of pelvic obliquity elements, pommel elements and wedge elements.

17. An adjustable anatomical support and seat cushion apparatus for wheelchairs, comprising: a resilient seat cushion member having a user supporting top surface with a generally rectangular planform and a corresponding rectangular bottom surface generally parallel to said top surface, said seat cushion member being made of material having adjustable, user support characteristics across said user supporting top surface; a generally rectangular planer base member having a planform substantially equivalent to that of said seat cushion member, said planer base member having a generally planer top surface with a front edge, a back edge, a left side edge and a right side edge, said seat cushion member being pivotally affixed to said planer base member along said back edge and being movable between a first disposition generally inclined relative to said planer base member and a second disposition generally parallel to and in relative engagement with the top surface of said planer base member; a plurality of seat cushion deforming elements selectively affixed to

predetermined areas of the top surface of said planer base member, said seat cushion deforming elements being operative to engage and deform said seat cushion member when said seat cushion member is moved from said first disposition relative to said planer base member into said second disposition relative to said planer base member; and means for maintaining said cushion member, said cushion deforming elements and said base member in engagement when said seat cushion member is moved from said first disposition into said second disposition causing said cushion deforming elements to engage and deform said seat cushion member thereby determining the user support characteristics of said cushion member 7

across said user supporting top surface.

18. An adjustable anatomical support and seat cushion apparatus for wheelchairs, as recited in claim 16 wherein at least one of said seat cushion member and said planer base member are made of at least one layer of thermoplastic elastomeric honeycomb material, and wherein at least one of said seat cushion deforming elements is a pelvic obliquity element disposed on said base member in a position proximate said back edge and one of said side edges thereof, at least one of said seat cushion deforming elements is a pommel element disposed on said planer base member in a position proximate said front edge and midway between said left and right side edges thereof, and/or at least one of said seat cushion deforming elements is a wedge element disposed on said planer base member in a position proximate said front edge and one of said left and right side edges thereof.