US4485505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating, inflatable mattress
Assignee: SSI Medical Services Inc
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Filing: 1981-08-10
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Granted: 1984-12-04
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Expires: 2001-08-10
Abstract
Abstract A mattress unit comprises an inflatable base having resilient support cells on its upper surface, the tops of the cells supporting a patient, and a cover over the cells with a gas inlet to provide an increased pressure between the cover and the cells. The cover is perforated to allow ventilation of a patient. The unit is suitable for long-stay patients.
Inventors
- 👤 Patrick R. D. Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:15
CPC Classifications
A; A47; A47C; A47C21/00; A47C21/04; A47C21/042; A47C21/046; A47C27/00; A47C27/14; A47C27/142; A47C27/144; A47C27/146; A47C27/18; A61; A61G; A61G7/00; A61G7/05; A61G7/057; A61G7/05784; A61G7/05715
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
118 words
A mattress unit comprising a hollow inflatible base support having a plurality of resilient upstanding support cells arranged on the upper surface of the base support, the tops of the cells being adapted to support a human body such that depression of one cell by weight of the human body will not depress adjacent uncontacted cells, thus avoiding substantial horizontal forces against the human body, the support cells being covered by a cover defining a gap between the support cells and the cover, said cover having a like configuration as said upper surface of said base support, and an inlet to allow gas under pressure to said gap, the cover being perforated to allow gas to escape upwardly.
Claim 2
Dependent Claim
118 words
A mattress unit comprising a hollow inflatible base support having a plurality of resilient upstanding support cells arranged on the upper surface of the base support, the tops of the cells being adapted to support a human body such that depression of one cell by weight of the human body will not depress adjacent uncontacted cells, thus avoiding substantial horizontal forces against the human body, the support cells being covered by a cover defining a gap between the support cells and the cover, said cover having a like configuration as said upper surface of said base support, and an inlet to allow gas under pressure to said gap, the cover being perforated to allow gas to escape upwardly.
Claim 3
Dependent Claim
18 words
A mattress unit according to claim 1, in which said cells comprise upstanding truncated pyramids separated by valleys.
Claim 4
Dependent Claim
26 words
A mattress unit according to claim 1 or 2, in which the support cells have substantially flat tops to support a patient lying on the mattress.
Claim 5
Dependent Claim
29 words
A mattress unit according to claim 1, in which the cover adjacent the tops of the cells has a greater density of perforations than the remainder of the cover.
Claim 6
Dependent Claim
19 words
A mattress unit according to claim 4, in which the perforations have a diameter from 0.01 to 0.5 mm.
Claim 7
Dependent Claim
38 words
A mattress unit according to claim 1, in which when gas is fed under pressure to said inlet the width of the gap is substantially uniform over substantially the whole area of the unit occupied by said cells.
Claim 8
Dependent Claim
19 words
A mattress unit according to claim 6, in which the width of said gap is up to 15 mm.
Claim 9
Dependent Claim
21 words
A mattress unit according to claim 1, in which the base support and cover are formed of a sheet plastics material.
Claim 10
Dependent Claim
39 words
A mattress unit according to claim 1, provided with a source of compressed gas for said inlet, the arrangement being such that the gas pressure generated in said gap is slightly greater than the pressure in the base support.
Claim 11
Dependent Claim
19 words
A mattress unit according to claim 1, in which the lower surface of the base support is substantially planar.
Claim 12
Dependent Claim
25 words
A mattress assembly, comprising a mattress provided with at least one cavity and a mattress unit according to claim 1 adapted to occupy said cavity.
Claim 13
Dependent Claim
19 words
A mattress assembly according to claim 11, comprising a plurality of mattress units adapted to occupy said cavity side-by-side.
Claim 14
Dependent Claim
35 words
A mattress assembly according to claim 11, provided with fixed resilient upstanding support cells of a foam material on part of its upper surface, the remainder of its upper surface being occupied by said cavity.
References Cited (Backward Citations)
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Cited
US3446203A
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US3492988A
Cited
US3653083A
Cited
US3822425A
Cited
US3942202A
Cited
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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) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |