Patent US3921230A successfully refreshed from Google Patents.
US3921230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for raising the end of a bed mattress
Assignee: Individual
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Filing: 1974-05-24
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Granted: 1975-11-25
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Expires: 1994-05-24
Abstract
Abstract The end regions of a bed mattress lie on a closed frame which is hung from a pair of parallel side beams bridged by a pair of parallel end beams and which has a rotatable actuating rod extending between the side beams and provided at each end with a hanger supporting the rod. This rod is provided with a pair of adjustment arms engageable with the mattress and with a crank connected to one end of a longitudinally extendable motor whose other end is carried on a rigid support assembly connected by hangers to the frame at locations remote from the hangers on the rod. This support assembly may comprise a simple bar extending back from the rod and connected via a hanger to the end beam of the bed or may comprise another rod parallel to the firstmentioned rod and connected via a rigid bar to the firstmentioned rod. It is also possible to provide this second rod with lifting arms driven by an operating crank so as to raise both ends of the mattress.
Inventors
- 👤 Robert Hanning
- 👤 Gernot Neumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:55
CPC Classifications
A; A47; A47C; A47C20/00; A47C20/04; A47C20/041
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
230 words
For use in combination with a hospital-type bed frame having parallel longitudinal sides and parallel transverse sides and a mattress having a portion hinged for displacement relative to another portion and resting on said frame, a mattress-displacing unit engageable with said displaceable portion of said mattress for selectively raising and lowering same, said unit comprising: a rigid shaft extending transversely to said longitudinal sides; first hanger means engaging said shaft at opposite ends thereof and mounting said shaft on said longitudinal sides for rotation of said shaft; a stationary rigid bar rotatably engaging said shaft at one end of said bar and extending perpendicular to said shaft for retaining said shaft at a fixed location relative to the other end of said bar; further hanger means at said other end of said bar engageable with a side of said frame; at least one lifting arm extending radially from said shaft and rotatably entrained therewith, said arm having a free end bearing on the undersides of said displaceable portion of said mattress for raising and lowering same relative to said frame upon rotation of said shaft; a crank lever carried by said shaft and rotatably entraining same; a linear positioning motor having relatively displaceable parts, one of said parts being articulated to said crank; and means for mounting the other of said parts on said stationary bar between said ends thereof.
Claim 2
Dependent Claim
230 words
For use in combination with a hospital-type bed frame having parallel longitudinal sides and parallel transverse sides and a mattress having a portion hinged for displacement relative to another portion and resting on said frame, a mattress-displacing unit engageable with said displaceable portion of said mattress for selectively raising and lowering same, said unit comprising: a rigid shaft extending transversely to said longitudinal sides; first hanger means engaging said shaft at opposite ends thereof and mounting said shaft on said longitudinal sides for rotation of said shaft; a stationary rigid bar rotatably engaging said shaft at one end of said bar and extending perpendicular to said shaft for retaining said shaft at a fixed location relative to the other end of said bar; further hanger means at said other end of said bar engageable with a side of said frame; at least one lifting arm extending radially from said shaft and rotatably entrained therewith, said arm having a free end bearing on the undersides of said displaceable portion of said mattress for raising and lowering same relative to said frame upon rotation of said shaft; a crank lever carried by said shaft and rotatably entraining same; a linear positioning motor having relatively displaceable parts, one of said parts being articulated to said crank; and means for mounting the other of said parts on said stationary bar between said ends thereof.
Claim 3
Dependent Claim
43 words
The apparatus defined in claim 1 wherein each of said hanger means comprises an L-shaped bracket having a flange adapted to overlie a respective side of said frame and a shank lying within said frame along an inner face of the respective side.
Claim 4
Dependent Claim
34 words
The apparatus defined in clAim 1 wherein said shaft has a pair of such arms at either end of said shaft for engagement with opposite longitudinal sides of the displaceable portions of said mattress.
Claim 5
Dependent Claim
67 words
The apparatus defined in claim 1 wherein another rigid shaft is provided at said other end of said bar and said further hanger means includes respective hangers for mounting said further shaft rotatably on said longitudinal sides of said frame, said means for mounting said other of said parts on said bar includes a further crank connected to said further shaft and articulated to said other part.
Claim 6
Dependent Claim
24 words
The apparatus defined in claim 1 wherein said bar includes a pair of telescoping parts and clamping means for locking the telescoping parts together.
Claim 7
Dependent Claim
14 words
The apparatus defined in claim 5 wherein said telescoping parts are of polygonal cross-section.
Claim 8
Dependent Claim
20 words
The apparatus defined in claim 5 wherein said clamping means includes a screw threaded into one of the telescoping parts.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |