US4726624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat cushion
Assignee: Sunrise Medical HHG Inc
•
Filing: 1986-03-10
•
Granted: 1988-02-23
•
Expires: 2006-03-10
Abstract
Abstract The present invention relates to a seat cushion for the human body which comprises a pad comprising a flexible envelope containing a fluid filling material, which pad is adapted to be used in combination with a shaped tray. In the preferred embodiment, the envelope of the pad is an extensible elastomeric material or the upper surface of the pad comprises excess material, and the pad is partitioned or segmented to limit the flow of the fluid filling material in selected areas of the pad.
Inventors
- 👤 Eric C. Jay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:13
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/021; A61; A61G; A61G5/00; A61G5/10; A61G5/1043; A61G5/1045; A61G5/1091; A61G7/00; A61G7/05; A61G7/057; A61G7/05715; A61G7/05738; Y; Y10; Y10S; Y10S297/00; Y10S297/01; Y10S5/00; Y10S5/922
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
167 words
A pressure equalizing seat cushion adapted to support a human body and reduce the build-up of pressure over the boney prominences of the body, said seat cushion comprising: a pad juxtaposed over a relatively rigid, shaped tray; said pad comprising a flexible envelope containing a flowable fluid filling material; said flexible envelope comprising an upper surface and a lower surface, said upper surface being sealed to said lower surface about their respective peripheries; said pad being segmented in selected areas by affixing said upper surface to said lower surface in said selected areas, whereby the flow of fluid filling material into said selected areas is limited; and said tray being shaped with a depressed area beneath the user's ischial tuberosities, said tray having side rims sloped downwardly from the outer edge toward said depressed area and a front rim sloped gradually downward from the front edge toward said depressed area, said rims adapted to urge the filling material in said envelope to flow toward said depressed area.
Claim 2
Dependent Claim
167 words
A pressure equalizing seat cushion adapted to support a human body and reduce the build-up of pressure over the boney prominences of the body, said seat cushion comprising: a pad juxtaposed over a relatively rigid, shaped tray; said pad comprising a flexible envelope containing a flowable fluid filling material; said flexible envelope comprising an upper surface and a lower surface, said upper surface being sealed to said lower surface about their respective peripheries; said pad being segmented in selected areas by affixing said upper surface to said lower surface in said selected areas, whereby the flow of fluid filling material into said selected areas is limited; and said tray being shaped with a depressed area beneath the user's ischial tuberosities, said tray having side rims sloped downwardly from the outer edge toward said depressed area and a front rim sloped gradually downward from the front edge toward said depressed area, said rims adapted to urge the filling material in said envelope to flow toward said depressed area.
Claim 3
Dependent Claim
26 words
The seat cushion of claim 1, wherein the pad is segmented adjacent to the front portion to restrict flow of filling material into said front portion.
Claim 4
Dependent Claim
25 words
The seat cushion of claim 1, wherein the pad is segmented adjacent to the sides to restrict flow of filling material into said side portion.
Claim 5
Dependent Claim
21 words
The seat cushion of claim 1, wherein the area of the pad beneath the ischial tuberosities is essentially free of segments.
Claim 6
Dependent Claim
33 words
The seat cushion of claim 1, wherein said filling material is a viscous liquid which flows gradually when pressure is applied, but substantially maintains its shape and position in the absence of pressure.
Claim 7
Dependent Claim
163 words
A pressure equalizing seat cuchion adapted to support a human body and reduce the build-up of pressure over the boney prominences of the body, said seat cushion comprising: a pad juxtaposed over a relatively rigid, shaped tray; said pad comprising a flexible envelope containing a flowable fluid filling material; said flexible envelope comprising an upper surface and a lower surface, said upper surface being sealed to said lower surface about their respective peripheries; said flowable fluid filling material being a viscous liquid which flows gradually when pressure is applied, but which substantially maintains its shape and position in the absence of pressure; and said tray being shaped with a depressed area beneath the user's ischial tuberosities, said tray having side rims sloped downwardly from the outer edge toward said depressed area and a front rim sloped gradually downward from the front edge toward said depressed area, said rims adapted to urge the filling material in said envelope to flow toward said depressed area.
Claim 8
Dependent Claim
163 words
A pressure equalizing seat cuchion adapted to support a human body and reduce the build-up of pressure over the boney prominences of the body, said seat cushion comprising: a pad juxtaposed over a relatively rigid, shaped tray; said pad comprising a flexible envelope containing a flowable fluid filling material; said flexible envelope comprising an upper surface and a lower surface, said upper surface being sealed to said lower surface about their respective peripheries; said flowable fluid filling material being a viscous liquid which flows gradually when pressure is applied, but which substantially maintains its shape and position in the absence of pressure; and said tray being shaped with a depressed area beneath the user's ischial tuberosities, said tray having side rims sloped downwardly from the outer edge toward said depressed area and a front rim sloped gradually downward from the front edge toward said depressed area, said rims adapted to urge the filling material in said envelope to flow toward said depressed area.
Claim 9
Dependent Claim
25 words
The seat cushion of claim 6, wherein the tray has an opening at its rear to accommodate the ischial tuberosities and coccyx of a user.
Claim 10
Dependent Claim
13 words
The seal cushion of claim 6, wherein the tray has symmetrical side rims.
Claim 11
Dependent Claim
23 words
The seat cushion of claim 6, wherein the upper surface of the envelope of said pad is fabricated from an extensible elastomeric material.
Claim 12
Dependent Claim
23 words
The seat cushion of claim 6, wherein said pad includes laterial extensions at both sides which extend beyond the rims of said tray.
Claim 13
Dependent Claim
23 words
The seat cushion of claim 10, wherein the envelope of said pad is at least 25% wider than the width of the tray.
Claim 14
Dependent Claim
16 words
The seat cushion of claim 6, wherein the pad is segmented adjacent to the front portion.
Claim 15
Dependent Claim
15 words
The seat cushion of claim 6, wherein the pad is segmented adjacent to the sides.
Claim 16
Dependent Claim
119 words
A pressure equalizing seat cushion adapted to support a human body against gravity and reduce the build up of pressure over bony prominences of the body, said seat cushion comprsing: a pad; said pad comprising a flexible envelope containing a flowable fluid filling material; said flexible envelope comprising an upper surface, and a lower surface, said upper surface being sealed to said lower surface about their respective peripheries; a portion of said pad being segmented to restrict the flow of filling material into said segmented portion of the pad; and said flowable fluid filling material being a viscous liquid which flows gradually when pressure is applied, but which substanitally maintains its shape and position in the absence of pressure.
Claim 17
Dependent Claim
119 words
A pressure equalizing seat cushion adapted to support a human body against gravity and reduce the build up of pressure over bony prominences of the body, said seat cushion comprsing: a pad; said pad comprising a flexible envelope containing a flowable fluid filling material; said flexible envelope comprising an upper surface, and a lower surface, said upper surface being sealed to said lower surface about their respective peripheries; a portion of said pad being segmented to restrict the flow of filling material into said segmented portion of the pad; and said flowable fluid filling material being a viscous liquid which flows gradually when pressure is applied, but which substanitally maintains its shape and position in the absence of pressure.
Claim 18
Dependent Claim
16 words
The seat cushion of claim 14, wherein the pad is segmented adjacent to the front portion.
Claim 19
Dependent Claim
15 words
The seat cushion of claim 14, wherein the pad is segmented adjacent to the sides.
Claim 20
Dependent Claim
145 words
A pressure compensating device adapted to support a human body, or portions thereof, against gravity while militating against the build up of pressure over bony prominences of the body comprising: a pad juxtaposed over a relatively rigid shaped tray; said pad comprising a flexible envelope containing a flowable fluid filling material; said flexible envelope comprising an upper surface and a lower surface, said upper surface being sealed to said lower surface about their respective peripheries; said flowable fluid filling material being a viscous liquid which flows gradually when pressure is applied, but which substantially maintains its shape and position in the absence of pressure, said tray including a plurality of upwardly extending rims, said rims including inwardly sloped portions adapted to urge said fluid filling material downward and under the sides of the body or body portions of the user of said pressure compensating device.
Claim 21
Dependent Claim
145 words
A pressure compensating device adapted to support a human body, or portions thereof, against gravity while militating against the build up of pressure over bony prominences of the body comprising: a pad juxtaposed over a relatively rigid shaped tray; said pad comprising a flexible envelope containing a flowable fluid filling material; said flexible envelope comprising an upper surface and a lower surface, said upper surface being sealed to said lower surface about their respective peripheries; said flowable fluid filling material being a viscous liquid which flows gradually when pressure is applied, but which substantially maintains its shape and position in the absence of pressure, said tray including a plurality of upwardly extending rims, said rims including inwardly sloped portions adapted to urge said fluid filling material downward and under the sides of the body or body portions of the user of said pressure compensating device.
References Cited (Backward Citations)
GB439936A
Cited
US2412112A
Cited
DE918227C
Cited
US2855986A
Cited
US3177036A
Cited
US3192099A
Cited
US3689949A
Cited
US3253861A
Cited
US3308491A
Cited
US3463547A
Cited
US3503649A
Cited
US3721232A
Cited
US3858379A
Cited
US3663973A
Cited
US4312087A
Cited
US4382306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |