US3678520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternating pressure pads for bed patients
Assignee: TALLEY SURGICAL INSTR Ltd
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Filing: 1970-12-14
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Granted: 1972-07-25
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Expires: 1990-12-14
Abstract
Abstract An air cell for use in an alternating pressure pad has a tube with its wall of flexible sheet material and at least the outermost half of the length of that tube, considered in the direction outwardly longitudinally from the longitudinal center of the tube, having its width increasing towards the remote end of the tube, a preferred form having the tube composed of two similar frusto-conical portions joined at their smaller ends.
Inventors
- 👤 Ronald James Peter Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:30
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/05; A61G7/057; A61G7/05769; A61G7/05776; Y; Y10; Y10S; Y10S297/00; Y10S297/03; Y10S5/00; Y10S5/932
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
An air cell, for use in plural assembly in an alternating pressure pad, comprising a discrete elongated tube of flexible sheet material, the wall of said tube being varied, in its peripheral dimension measured in a plane normal to the median longitudinal axis of the tube, at points along the length of the tube such that at least the outermost half of the length of the tube, considered in the direction outwardly longitudinally from the longitudinal center of the tube, increases in both width and height towards the remote end of the tube.
Claim 2
Dependent Claim
93 words
An air cell, for use in plural assembly in an alternating pressure pad, comprising a discrete elongated tube of flexible sheet material, the wall of said tube being varied, in its peripheral dimension measured in a plane normal to the median longitudinal axis of the tube, at points along the length of the tube such that at least the outermost half of the length of the tube, considered in the direction outwardly longitudinally from the longitudinal center of the tube, increases in both width and height towards the remote end of the tube.
Claim 3
Dependent Claim
18 words
An air cell, as claimed in claim 1, wherein the portion of increasing width and height is frusto-conical.
Claim 4
Dependent Claim
23 words
An air cell, as claimed in claim 2, wherein the tube is composed of two similar frusto-conical portions joined at their smaller ends.
Claim 5
Dependent Claim
37 words
An air cell, as claimed in claim 2, wherein the tube is composed of an intermediate cylindrical portion, and two similar frusto-conical portions each joined at its smaller end to a respective end of the cylindrical portion.
Claim 6
Dependent Claim
18 words
An air cell, as claimed in claim 1, connected at one of its ends to a header tube.
Claim 7
Dependent Claim
33 words
For use in an alternating pressure pad, a series of air cells as claimed in claim 1, disposed in spaced parallel position and each connected at one end to a common header tube.
Claim 8
Dependent Claim
24 words
An alternating pressure pad comprising two series of air cells as claimed in claim 6 disposed with the cells of the two series interdigitated.
Claim 9
Dependent Claim
37 words
In combination, an alternating pressure pad as claimed in claim 7, and means for supplying air to and exhausting air from the series of cells, such that the two series of cells are inflated and deflated alternately.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |