US6082824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Therapeutic sling seat
Assignee: Individual
•
Filing: 1997-11-06
•
Granted: 2000-07-04
•
Expires: 2017-11-06
Abstract
Abstract A therapeutic sling seat comprising a flexible material which is non-uniform in stiffness providing maximum contact surface area with the body of a person seated in the seat by spreading the forces away from high pressure areas using multiaxis tension forces. The seat material in tension adapts to the contour of the posterior of the seated person. By controlling the pressures on the ischial tuberosities, physical problems such as ulcers can be avoided.
Inventors
- 👤 William W. Chow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:41
CPC Classifications
A; A47; A47C; A47C9/00; A47C9/002; A47C7/00; A47C7/02; A47C7/029; A61; A61G; A61G5/00; A61G5/10; A61G5/1043; A61G5/1045; A61G7/00; A61G7/05; A61G7/057
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
213 words
A sling seat assembly for use by a person seated in a wheelchair having a solid horizontal support, said seat comprising: a first flexible layer having first means for accommodating the ischial tuberosities of a person seated on said assembly; a second flexible layer, located adjacent to said first layer, having second means aligned with said first accommodating means for accommodating the ischial tuberosities of the person; a third flexible layer, located adjacent to said second layer on the side opposite said first layer, having third means aligned with said first and second accommodating means for accommodating the ischial tuberosities of the person; a fourth flexible layer, located adjacent to said third layer on the side opposite said second layer, having fourth means aligned with said first, second, and third accommodating means for accommodating the ischial tuberosities of the person; and a rigid planar layer, located adjacent to said fourth layer composed of sheet material and on the side opposite said third layer, having fifth means aligned with said first, second, third and fourth accommodating means for accommodating the ischial tuberosities of the person; whereby when said assembly is placed upon a solid horizontal support associated with a wheelchair, said assembly performs as a sling seat for a person seated upon said assembly.
Claim 2
Dependent Claim
213 words
A sling seat assembly for use by a person seated in a wheelchair having a solid horizontal support, said seat comprising: a first flexible layer having first means for accommodating the ischial tuberosities of a person seated on said assembly; a second flexible layer, located adjacent to said first layer, having second means aligned with said first accommodating means for accommodating the ischial tuberosities of the person; a third flexible layer, located adjacent to said second layer on the side opposite said first layer, having third means aligned with said first and second accommodating means for accommodating the ischial tuberosities of the person; a fourth flexible layer, located adjacent to said third layer on the side opposite said second layer, having fourth means aligned with said first, second, and third accommodating means for accommodating the ischial tuberosities of the person; and a rigid planar layer, located adjacent to said fourth layer composed of sheet material and on the side opposite said third layer, having fifth means aligned with said first, second, third and fourth accommodating means for accommodating the ischial tuberosities of the person; whereby when said assembly is placed upon a solid horizontal support associated with a wheelchair, said assembly performs as a sling seat for a person seated upon said assembly.
Claim 3
Dependent Claim
15 words
The assembly of claim 1, wherein said first flexible layer contains a downwardly extending portion.
Claim 4
Dependent Claim
18 words
The assembly of claim 1, wherein said first flexible layer is constructed from an open celled polyurethane foam.
Claim 5
Dependent Claim
25 words
The assembly of claim 1, wherein said first accommodating means comprises a pair of spaced apart apertures corresponding to the ischial tuberosities of a person.
Claim 6
Dependent Claim
22 words
The assembly of claim 1, wherein said second accommodating means comprises a pair of spaced apart apertures corresponding to the ischial tuberosities.
Claim 7
Dependent Claim
22 words
The assembly of claim 1, wherein said third accommodating means comprises a pair of spaced apart apertures corresponding to the ischial tuberosities.
Claim 8
Dependent Claim
35 words
The assembly of claim 6, wherein said third flexible layer further includes a support positioned between said spaced apart apertures and extending rearwardly to enhance the weight distribution of the person seated on said assembly.
Claim 9
Dependent Claim
18 words
The assembly of claim 1, wherein said fourth accommodating means comprises an aperture for accommodating the ischial tuberosities.
Claim 10
Dependent Claim
18 words
The assembly of claim 1, wherein said fifth accommodating means comprises an aperture for accommodating the ischial tuberosities.
Claim 11
Dependent Claim
25 words
The assembly of claim 1, wherein said fourth flexible layer consists of a plurality of separate foam sections composed from materials having different physical properties.
Claim 12
Dependent Claim
27 words
The assembly of claim 1, further comprising a median divider, located beneath said second flexible layer, for positioning the legs of a person seated upon said assembly.
Claim 13
Dependent Claim
22 words
The assembly of claim 1, wherein said rigid planar layer contains a plurality of apertures located forward of said fifth accommodating means.
Claim 14
Dependent Claim
72 words
The assembly of claim 12, further comprising a fifth rigid layer located adjacent said rigid planar layer on the side opposite said fourth flexible layer, having sixth means aligned with said first, second, third, fourth and fifth accommodating means for accommodating the ischial tuberosities of the person, and a plurality of raised protrusions associated with said plurality of apertures within said rigid planar layer for positioning said assembly upon said horizontal support.
Claim 15
Dependent Claim
30 words
The assembly of claim 1, wherein said fourth flexible layer contains a cutout section adjacent said fourth accommodating means for positioning the coccyx of the person seated upon the assembly.
Claim 16
Dependent Claim
30 words
The assembly of claim 1, wherein said third flexible layer includes a Y-shaped section for providing tension support for the coccyx and ilium of a person seated upon said assembly.
Claim 17
Dependent Claim
38 words
The assembly of claim 1, further comprising supporting means having a sixth flexible layer adjacent to said first flexible layer, such that said sixth layer is subject to tension forces when a person is seated upon said assembly.
References Cited (Backward Citations)
US2047616A
Cited
US2384713A
Cited
US2823394A
Cited
US2819712A
Cited
US3111689A
Cited
US3251075A
Cited
US3222694A
Cited
US3337884A
Cited
US3308491A
Cited
US3376070A
Cited
US3503649A
Cited
US3689948A
Cited
US3858379A
Cited
US3663973A
Cited
US3867732A
Cited
US3965508A
Cited
US3984886A
Cited
US4073021A
Cited
US4042987A
Cited
US5336708A
Cited
US5334646A
Cited
US5334646B1
Cited
US4132228A
Cited
GB2000964A
Cited
US4279044A
Cited
US4347213A
Cited
US4370769A
Cited
US4726624A
Cited
US4726624B1
Cited
US4588229A
Cited
US4713854A
Cited
DE3542854A1
Cited
US4682818A
Cited
US4728551A
Cited
US4847933A
Cited
US4781417A
Cited
US5018790A
Cited
US4953913A
Cited
US5403065A
Cited
US5292462A
Cited
US5173307A
Cited
US5513899A
Cited
US5318348A
Cited
US5613257A
Cited
US5568660A
Cited
US5524971A
Cited
US5592707A
Cited
US5647637A
Cited
US5671977A
Cited
US5390384A
Cited
US5681092A
Cited
US5613256A
Cited
US5657499A
Cited
US5680662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-07-04 | 2004-01-03 | 2004-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-07-04 | 2008-01-03 | 2008-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-07-04 | 2012-01-03 | 2012-07-04 | $7700.00 | Window Closed / Lapsed |