Patent US4753480A successfully refreshed from Google Patents.
US4753480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pad assembly for wheelchairs
Assignee: Individual
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Filing: 1987-05-14
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Granted: 1988-06-28
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Expires: 2007-05-14
Abstract
Abstract A modifiable pressure distribution pad assembly for a wheelchair comprises a bottom pad of resilient foam material of high density and at least one upper pad of resilient foam material of intermediate density having at least one cutout defining an opening therethrough. Filler foam material of low density is frictionally mounted as an insert in at least one of the openings of one of the upper pads and removable therefrom. A cover encloses the pads, the cover permitting removal of the upper pads and associated filler material therefrom so that filler foam material in one opening can be separated from the upper pads and replaced in the one opening by filler foam material of a different density prior to return of the upper pads and associated filler foam material to the cover. A kit for preparing a modifiable assembly includes in addition, for at least one of the openings, a plurality of inserts of filler foam material adapted to be removably mounted in the opening, the inserts being of filler foam material having different low densities from each other.
Inventors
- 👤 Theodore R. Morell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:35
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/14; A47C27/20; A47C27/148; A47C27/15; A47C7/00; A47C7/02; A47C7/029; A61; A61G; A61G5/00; A61G5/10; A61G5/1043; A61G5/1045; A61G5/1091; A61G7/00; A61G7/05; A61G7/057; A61G7/05715; Y; Y10; Y10S; Y10S297/00; Y10S297/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
185 words
A modifiable pressure distribution pad assembly for a wheelchair comprising: (A) a bottom pad of resilient foam material of high density; (B) at least one upper pad of resilient foam material of an intermediate density less than said high density, said upper pad being supported by said bottom pad and having at least one cutout defining an opening therethrough; (C) a fluid-tight pouch at least partially filled with fluid frictionally mounted as an insert in at least one of said openings of at least one of said upper pads and removable therefrom, said pouch insert having a firmness less than that of said at least one upper pad; and (D) a cover enclosing said pads, said cover permitting removal of said upper pad and associated pouch insert therefrom so that said pouch insert in said at least one opening can be separated from said upper pad, the amount of fluid in said pouch insert varied to modify the firmness thereof, and said pouch insert replaced in said at least one opening prior to return of said upper pad and associated pouch insert to said cover.
Claim 2
Dependent Claim
185 words
A modifiable pressure distribution pad assembly for a wheelchair comprising: (A) a bottom pad of resilient foam material of high density; (B) at least one upper pad of resilient foam material of an intermediate density less than said high density, said upper pad being supported by said bottom pad and having at least one cutout defining an opening therethrough; (C) a fluid-tight pouch at least partially filled with fluid frictionally mounted as an insert in at least one of said openings of at least one of said upper pads and removable therefrom, said pouch insert having a firmness less than that of said at least one upper pad; and (D) a cover enclosing said pads, said cover permitting removal of said upper pad and associated pouch insert therefrom so that said pouch insert in said at least one opening can be separated from said upper pad, the amount of fluid in said pouch insert varied to modify the firmness thereof, and said pouch insert replaced in said at least one opening prior to return of said upper pad and associated pouch insert to said cover.
Claim 3
Dependent Claim
22 words
The pad assembly of claim 1 wherein said fluid is selected from the group consisting of air, water, gel and mixtures thereof.
Claim 4
Dependent Claim
29 words
The pad assembly of claim 1 wherein said pouch insert contains manually operable valve means to permit the introduction, maintenance and removal of fluid relative to said pouch insert.
Claim 5
Dependent Claim
132 words
The pad assembly of claim 1 additionally comprising filler foam material frictionally mounted as an insert in said at least one opening with said pouch insert and removable therefrom, said filler foam material having a low density less than said intermediate density, said pouch insert when substantially filled with fluid and said filler foam material insert having combined heights enabling both inserts to be received one atop the other within said at least one opening, and said cover permitting removal of said upper pad and associated inserts therefrom so that said inserts in said at least one opening can be separated from said upper pad and replaced in said one opening by inserts of a different effective combined firmness prior to return of said upper pad and associated inserts to said cover.
Claim 6
Dependent Claim
160 words
A kit for preparing an individualized and modifiable pressure distribution pad assembly for a wheelchair comprising: (A) a bottom pad of resilient foam material of high density; (B) at least one upper pad of resilient foam material of an intermediate density less than said high density, said upper pad having at least one cutout defining an opening therethrough and being adapted to be supported by said bottom pad; (C) for said at least one opening, a plurality of inserts adapted to be removably mounted in said at least one opening, at least one of said inserts being of filler foam material having a low density less than said intermediate density, and at least one of said inserts being a fluid-tight pouch adapted to be filled with fluid; and (D) a cover adapted to enclose said pads, said cover permitting insertion into and removal from said cover of said upper pad and those of said inserts mounted in said opening thereof.
Claim 7
Dependent Claim
160 words
A kit for preparing an individualized and modifiable pressure distribution pad assembly for a wheelchair comprising: (A) a bottom pad of resilient foam material of high density; (B) at least one upper pad of resilient foam material of an intermediate density less than said high density, said upper pad having at least one cutout defining an opening therethrough and being adapted to be supported by said bottom pad; (C) for said at least one opening, a plurality of inserts adapted to be removably mounted in said at least one opening, at least one of said inserts being of filler foam material having a low density less than said intermediate density, and at least one of said inserts being a fluid-tight pouch adapted to be filled with fluid; and (D) a cover adapted to enclose said pads, said cover permitting insertion into and removal from said cover of said upper pad and those of said inserts mounted in said opening thereof.
Claim 8
Dependent Claim
21 words
The kit of claim 5 wherein said fluid is selected from the group consisting of air, water, gels and mixtures thereof.
Claim 9
Dependent Claim
28 words
The kit of claim 5 wherein said pouch insert contains manually operable valve means to permit the introduction, maintenance and removal of fluid relative to said pouch insert.
Claim 10
Dependent Claim
52 words
The kit of claim 5 wherein said pouch insert and said at least one filler foam material insert have heights enabling both said pouch insert, when substantially filled with fluid, and said at least one filler foam material to be received insert one atop the other within said at least one opening.
Claim 11
Dependent Claim
16 words
The kit of claim 5 wherein one of said filler foam material inserts is said cutout.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-28 | 1991-12-28 | 1992-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-28 | 1995-12-28 | 1996-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-28 | 1999-12-28 | 2000-06-28 | $7700.00 | Window Closed / Lapsed |