Patent US3781928A successfully refreshed from Google Patents.
US3781928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for raising the head end and/or foot end of a bed
Assignee: PER ERIK PETTERSSON SW
•
Filing: 1971-04-05
•
Granted: 1974-01-01
•
Expires: 1991-04-05
Abstract
Abstract A device for raising an lowering the head end and/or foot end of a mattress of a bed from a bedstead comprising an inflatable pad positioned at the head end and/or foot end of the bedstead between the bedstead and the mattress to raise or lower the associated end of the mattress. The pad is mounted in a frame which is composed of upper and lower hinged U-shaped parts each of which includes a plate of thin rigid material fixedly attached to the parallel legs of the associated frame part. The pad is attached only to the plate of the bottom part and is free to slide on the plate of the upper part when the mattress is raised and lowered in the course of inflation and deflation of the pad.
Inventors
- 👤 S Swallert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:50
CPC Classifications
A; A47; A47C; A47C20/00; A47C20/04; A47C20/048
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
160 words
A device for raising and lowering the head end and/or foot end of a bed from a bedstead, said device comprising an inflatable pad positioned at the head end and/or foot end of the bedstead between the bedstead and the mattress, a frame supporting said pad and comprising a U-shaped upper part and a Ushaped bottom part, hinge means pivotally joining said parts together at the free ends thereof, the upper part being positioned within the bottom part, each said part of the frame including a plate of thin rigid material fixedly attached to the parallel legs of the associated part of the frame, and means attaching the pad to the plate of said bottom part, said pad being free of said plate of the upper part in order to permit said upper part to freely slide on said pad as said end of the mattress is raised and lowered in the course of inflation and deflation of said pad.
Claim 2
Independent Claim
160 words
A device for raising and lowering the head end and/or foot end of a bed from a bedstead, said device comprising an inflatable pad positioned at the head end and/or foot end of the bedstead between the bedstead and the mattress, a frame supporting said pad and comprising a U-shaped upper part and a Ushaped bottom part, hinge means pivotally joining said parts together at the free ends thereof, the upper part being positioned within the bottom part, each said part of the frame including a plate of thin rigid material fixedly attached to the parallel legs of the associated part of the frame, and means attaching the pad to the plate of said bottom part, said pad being free of said plate of the upper part in order to permit said upper part to freely slide on said pad as said end of the mattress is raised and lowered in the course of inflation and deflation of said pad.
Claim 3
Dependent Claim
40 words
A device as claimed in claim 1 wherein said means which attaches the pad to the plate of said bottom part comprises strips extending from said pad in opposite directions and detachably engaged with said plate of the bottom part.
Claim 4
Dependent Claim
27 words
A device as claimed in claiM 2 wherein said strips are of a length to wrap around the plate of said bottom part at opposite ends thereof.
Claim 5
Dependent Claim
41 words
A device as claimed in claim 2 wherein said means which attaches the pad to the plate of said bottom part further comprises hooks extending from said pad and engaging said plate at the end thereof closest to the hinge means.
Claim 6
Dependent Claim
52 words
A device as claimed in claim 1 wherein said pad has a bottom face which is secured to the plate of said bottom part and a side face which contacts the plate of said upper part, said bottom face and side face having substantially smaller length and width dimensions than said plates.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |