US4847933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support pad for nonambulatory persons
Assignee: Individual
•
Filing: 1988-05-19
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Granted: 1989-07-18
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Expires: 2008-05-19
Abstract
Abstract A foam support pad for nonambulatory persons provides for a wide weight distribution and maximum aeration of skin areas in contact with the pad to prevent the formation of decubitus ulcers. The top surface of the pad has an array of protuberances and valleys thereon, air channels extend through the pad, and a grooved reticulated foam layer provides a flow-through base. An electric fan disposed in the interior of the pad boosts airflow to the skin areas in contact with the pad. Cold packs or heating pads can be accommodated within the pad to adjust the temperature of the airflow accordingly.
Inventors
- 👤 Peter H. Bedford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:10
CPC Classifications
A; A61; A61G; A61G5/00; A61G5/10; A61G5/1043; A61G5/1091; A61G7/00; A61G7/05; A61G7/057; A61G7/05715; A61G7/05784
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
257 words
A support pad for nonambulatory persons said pad having a multi-layer foam body, the improvement in the pad comprising: an upper, open-cell foam layer having a top and a bottom face, said top face having a substantially uniform distribution of hills of substantially uniform height and cross-section, said hills being separated by valleys of substantially uniform depth and uniform cross-section, each of said hills having a flat top, each of said valley having an airflow channel terminating at the valley floor and extending through the upper layer to the bottom face; a middle foam layer having a top face and a bottom face, a cutout section near its center, and air channels extending through the middle layer from its top face to its bottom face, the top face of said middle layer being joined to the bottom face of the upper layer and the air channels of the middle layer coinciding with the air channels of the upper layer; an electric fan rotating about a vertical axis disposed within the cutout section of the middle layer; a lower reticulated foam layer having a top face and a bottom face, the top face of said lower layer being joined to the bottom face of the middle layer and supporting a portion of said fan, whereby the tops of the hills of the upper layer support a human anatomy with even weight distribution and reduced contact pressure and fresh outside airflow to the human anatomy in contact with the pad is boosted by the operation of the electric fan.
Claim 2
Dependent Claim
257 words
A support pad for nonambulatory persons said pad having a multi-layer foam body, the improvement in the pad comprising: an upper, open-cell foam layer having a top and a bottom face, said top face having a substantially uniform distribution of hills of substantially uniform height and cross-section, said hills being separated by valleys of substantially uniform depth and uniform cross-section, each of said hills having a flat top, each of said valley having an airflow channel terminating at the valley floor and extending through the upper layer to the bottom face; a middle foam layer having a top face and a bottom face, a cutout section near its center, and air channels extending through the middle layer from its top face to its bottom face, the top face of said middle layer being joined to the bottom face of the upper layer and the air channels of the middle layer coinciding with the air channels of the upper layer; an electric fan rotating about a vertical axis disposed within the cutout section of the middle layer; a lower reticulated foam layer having a top face and a bottom face, the top face of said lower layer being joined to the bottom face of the middle layer and supporting a portion of said fan, whereby the tops of the hills of the upper layer support a human anatomy with even weight distribution and reduced contact pressure and fresh outside airflow to the human anatomy in contact with the pad is boosted by the operation of the electric fan.
Claim 3
Dependent Claim
32 words
The support pad of claim 11 wherein the flat tops on each of said hills are at least 1/2 inch in diameter and are no larger than 1 1/4 inches in diameter.
Claim 4
Dependent Claim
17 words
The support pad of claim 1 wherein the airflow channels are at least 5/8 inch in diameter.
Claim 5
Dependent Claim
48 words
The support pad of claim 1 wherein the lower reticulated foam layer has an array of shallow grooves on its bottom face extending completely across and out to the periphery of the pad whereby access of fresh outside air to the interior of the pad is further increased.
Claim 6
Dependent Claim
31 words
The support pad of claim 4 wherein the grooves on the bottom face of the lower reticulated foam layer are about 1/8 to 1/4 inch wide and about 1/2 inch deep.
Claim 7
Dependent Claim
53 words
The support pad of claim 1 wherein the lower reticulated foam layer has air channels extending from the lower layer's top face through to its bottom face, said air channels being positioned such that the air channels of the lower layer coincide with the position of the air channels of the middle layer.
Claim 8
Dependent Claim
49 words
The support pad of claim 6 wherein the lower reticulated foam layer has an array of shallow grooves on its bottom face interconnecting the airflow channels and extending to the periphery of the pad whereby access of fresh outside air to the interior of the pad is further increased.
Claim 9
Dependent Claim
31 words
The support pad of claim 7 wherein the grooves on the bottom face of the lower reticulated foam layer are about 1/8 to 1/4 inch wide and about 1/2 inch deep.
Claim 10
Dependent Claim
33 words
The support pad of claim 1 wherein the lower reticulated foam layer has a cutout section positioned below the cutout section of the middle layer in which a cold pack can be placed.
Claim 11
Dependent Claim
28 words
The support pad of claim 1 wherein the lower reticulated foam layer has cutout sections near the periphery of the pad in which cold packs can be placed.
Claim 12
Dependent Claim
33 words
The support pad of claim 1 wherein the lower reticulated foam layer has a cutout section positioned below the cutout section of the middle layer in which a heating pad can be placed.
Claim 13
Dependent Claim
37 words
The support pad of claim 1 wherein the upper layer is about 1 to 3 inches thick, the middle layer is 2 to 3 inches thick and the lower layer is 1 to 1 1/2 inches thick.
References Cited (Backward Citations)
FR596399A
Cited
US2688070A
Cited
US3266064A
Cited
US3681797A
Cited
US3818522A
Cited
GB2032269A
Cited
DE3017379A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |