Seat cushion
First Claim
Patent Images
1. 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.
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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.
170 Citations
17 Claims
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1. 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:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. 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:
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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. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. 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:
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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. - View Dependent Claims (15, 16)
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17. 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:
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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.
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Specification