Patent US3802004A successfully refreshed from Google Patents.
US3802004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid containing mattress
Assignee: Individual
•
Filing: 1971-12-29
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Granted: 1974-04-09
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Expires: 1991-12-29
Abstract
Abstract A water bed for use with persons suffering long-term disabilities comprises a centrally located portion filled with a fixed amount of water or other suitable fluid and two pairs of inflatable air cells associated therewith. By selective inflation of the air cells the depth of the fluid can be raised or lowered without changing the amount of fluid in the bed. This feature allows a patient to effectively lower the depth of the fluid to a point where the patient can turn himself over; something extremely difficult to accomplish with the greater depth.
Inventors
- 👤 J Whitney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:57
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/08; A47C27/081; A47C27/085
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A mattress for use with bed-ridden patients comprising a patient supporting portion containing a fixed amount of body supporting liquid and means associated with said patient supporting portion for changing the depth thereof without changing the amount of said fixed amount of liquid, said means for changing the depth of said liquid including at least two spaced apart, independent, sequentially inflatable-deflatable air cells with means to inflate and deflate each cell, one air cell extending longitudinally along said mattress.
Claim 2
Dependent Claim
79 words
A mattress for use with bed-ridden patients comprising a patient supporting portion containing a fixed amount of body supporting liquid and means associated with said patient supporting portion for changing the depth thereof without changing the amount of said fixed amount of liquid, said means for changing the depth of said liquid including at least two spaced apart, independent, sequentially inflatable-deflatable air cells with means to inflate and deflate each cell, one air cell extending longitudinally along said mattress.
Claim 3
Dependent Claim
23 words
The mattress of claim 1 wherein said patient supporting portion comprises a substantially rectangular, liquid-tight bag having at least one sealable fill opening.
Claim 4
Dependent Claim
51 words
The mattress of claim 2 wherein said means for changing the depth of said liquid comprises two pairs of air cells, each pair having a small diameter cell and a larger diameter cell, one each of said pairs of cells extending longitudinally along said rectangular bag and being operatively attached thereto.
Claim 5
Dependent Claim
25 words
The mattress of claim 3 wherein a pillow section filled with air is provided at the head end and the foot end of said mattress.
Claim 6
Dependent Claim
50 words
The mattress of claim 4 wherein said small diameter cells are individually and independently fillable with air and said larger diameter cells have a common fill position, the connection between said larger diameter cells being via said pillow sections whereby said pillow sections are inflated with said larger diameter cells.
Claim 7
Dependent Claim
158 words
The mattress of claim 5 wherein said mattress is constructed of at least three substantially rectangular fluid impervious sheets of material, a first of said sheets forming the bottom of said mattress; a seconD sheet overlying said first sheet and sealed thereto completely around the peripheral edge and having two longitudinal seals spaced inwardly from said peripheral seal a distance sufficient to form the required diameter of said larger diameter cells and two transverse seals spaced inwardly from said peripheral seal a distance sufficient to form said pillow section, the places of jointure between said longitudinal seals and said transverse seals being provided with interconnecting air passages; and a third sheet overlying said first and second sheets and being sealed thereto about the peripheral edge and having two longitudinal seals consummated between said third sheet and said second sheet, said longitudinal seals being spaced inwardly from said peripheral seal a distance sufficient to form said small diameter cells.
Claim 8
Dependent Claim
26 words
The mattress of claim 6 wherein strap means are provided on the under surface of said first sheet for attaching said mattress to a conventional mattress.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |