Patent US4297753A successfully refreshed from Google Patents.
US4297753A
Expired / Lapsed
US
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Patient transfer device
Assignee: Kirschner Medical Corp
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Filing: 1979-09-07
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Granted: 1981-11-03
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Expires: 1999-09-07
Abstract
Abstract A patient transfer device having a frame which supports a number of parallel rollers over which an endless belt is fitted for travel across the rollers. The frame is rendered intermediately foldable for compactness of storage or carrying and particularly to facilitate initial installation and subsequent changing of belts for asepsis and/or wear replacement.
Inventors
- 👤 Robert J. Langren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:48
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/10; A61G7/1025; A61G7/1032; A61G2200/00; A61G2200/30; A61G2200/32; A61G2200/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
67 words
In a patient transfer device having a frame with trussed opposite end plates carrying a plurality of parallel rollers which support an endless belt very tightly, the improvement comprising: means permitting selective folding of said end plates from a straight configuration, defining a tight belt condition, into a U-shaped configuration, defining a loose belt condition and cam means for releasably locking said plates in said straight configuration.
Claim 2
Dependent Claim
67 words
In a patient transfer device having a frame with trussed opposite end plates carrying a plurality of parallel rollers which support an endless belt very tightly, the improvement comprising: means permitting selective folding of said end plates from a straight configuration, defining a tight belt condition, into a U-shaped configuration, defining a loose belt condition and cam means for releasably locking said plates in said straight configuration.
Claim 3
Dependent Claim
55 words
The improvement according to claim 1 wherein said end plates each comprise a pair of arms and a middle plate, said means for releasably locking said end plates including a pair of screws each formed with cam surfaces, one connecting each end of said middle plate to a one end of one of said arms.
Claim 4
Dependent Claim
22 words
The improvement according to claim 2 wherein said arms of each of said end plates are recessed to receive said middle plate.
Claim 5
Dependent Claim
47 words
The improvement according to claim 3 wherein mating surfaces of each recessed portion of each arm and the underside of said middle plate are provided with interlocking raised portions and channelling for locking said end plates in said straight configuration when said pair of screws are tightened.
Claim 6
Dependent Claim
27 words
The improvement according to claim 4 wherein the underside of said middle plate is channelled and recessed portions of said arms are provided with matching raised portions.
Claim 7
Dependent Claim
34 words
The improvement according to claim 3 wherein said arms are afforded slots through which said screws are extended toward said middle plate, there being threaded openings in said middle plate for receiving said screws.
Claim 8
Dependent Claim
15 words
The improvement according to claim 6 including an eccentric countersink in each of said slots.
Claim 9
Dependent Claim
37 words
The improvement according to claim 7 wherein said screws are provided with tapered heads and said tapered heads are drawn into said eccentric countersinks when said screws are tightened effective to cam said arms toward one another.
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) | 1984-11-02 | 1985-05-04 | 1985-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-02 | 1989-05-04 | 1989-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-02 | 1993-05-04 | 1993-11-03 | $7700.00 | Window Closed / Lapsed |