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US3797052A
Expired / Lapsed
US
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Trendelenberg mechanism
Assignee: BLOOMCRAFT Inc
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Filing: 1972-03-06
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Granted: 1974-03-19
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Expires: 1992-03-06
Abstract
Abstract A Trendelenberg mechanism for variable height beds of the kind having legs telescopically extensible from and retractable into the corner posts thereof by means of flexible cables extending from the legs to a cable-hauling mechanism, in which the cables are connected to the cable-hauling mechanism in pairs each respectively associated with one of the ends of the bed, and in which one of the cable pairs is disconnectible from the cablehauling mechanism at either of the fully raised or fully lowered positions of the bed and retained at such position while the cable-hauling mechanism is operated to lower or raise the other end of the bed, respectively, thereby to tilt the bed longitudinally in either direction, i.e., to place the occupant in the ''''head-down'''' or Trendelenberg position, or in the ''''headup'''' or reverse Trendelenberg position.
Inventors
- 👤 C Licina
- 👤 R Miller
- 👤 N Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:21
CPC Classifications
A; A61; A61G; A61G7/00; A61G7/002; A61G7/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
In an elevating mechanism for a variable height bed having extensible and retractable legs and flexible cables trained from said legs to a common cable hauling mechanism on the frame of the bed, a Trendelenberg adjustment which comprises the connection of said cables to said cable - hauling mechanism by separate pairs respectively associated with opposite ends of the bed, the connection of one of said cable pairs being disengageable from the cable-hauling mechanism at either the retracted or the extended positions of the bed legs associated therewith, thereby to tilt the bed longitudinally by subsequent extension or retraction respectively of the legs associated with the other cable pair, and means on the bed frame for carrying the load on said one cable pair when disengaged from said cable-hauling mechanism.
Claim 2
Dependent Claim
130 words
In an elevating mechanism for a variable height bed having extensible and retractable legs and flexible cables trained from said legs to a common cable hauling mechanism on the frame of the bed, a Trendelenberg adjustment which comprises the connection of said cables to said cable - hauling mechanism by separate pairs respectively associated with opposite ends of the bed, the connection of one of said cable pairs being disengageable from the cable-hauling mechanism at either the retracted or the extended positions of the bed legs associated therewith, thereby to tilt the bed longitudinally by subsequent extension or retraction respectively of the legs associated with the other cable pair, and means on the bed frame for carrying the load on said one cable pair when disengaged from said cable-hauling mechanism.
Claim 3
Dependent Claim
149 words
The subject matter of claim 1 wherein the cable-hauling mechanism comprises a screw-actuated draw bar, and the disengageable cable pair is secured to a crosshead movable by said draw bar in ways on said bed frame, and said load carrying means includes the engagement of said crosshead with the bed frame at the one end of said ways corresponding to the retracted position of the associated bed legs, and detent means on said bed frame selectively engageable with said crosshead at the other end of said ways to maintain the extended position of said associated bed legs when the draw bar is actuated to permit the retraction of the legs associated with the other cable pair, and wherein the disengageable connection of the draw bar and crosshead is a clutch normally engaged to transmit the cable load on said crosshead to said draw bar when said bed is elevated.
Claim 4
Dependent Claim
31 words
The subject matter of claim 2 wherein the selective engagement of said detent means and the selective disengagement of said normally engaged clutch are effected by a common manually operated control.
Claim 5
Dependent Claim
94 words
The subject matter of claim 2 wherein the draw bar comprises in part a rod passing freely through said crosshead and having thereon a ball clutch positioned to engage the crosshead on one side thereof to transmit the cable load to the draw bar, and wherein said detent means comprises a normally disengaged hook member movable on said bed frame to engage said crosshead to retain said disengageable cable pair in full leg-extending position when the draw bar is subsequently moved to permit the retraction of the legs associated with the other cable pair.
Claim 6
Dependent Claim
207 words
The subject matter of claim 2 wherein the ways for the cross head are defined by longitudinal slots in the webs of facing channel members which flank and guard the draw bar, and the crosshead has ends projecting sidewardly through said slots, and said detent means comprises an upwardly open hook on the outside of each channel member and connected to the otHer hook by an integral cross member spanning the two hooks, each said hook pivoted to its respective channel member on an axis common to both and raisable to engage the sidewardly projecting ends of the crosshead by a movement of the cross bar longitudinally of the bed, said clutch being disengageable by a longitudinal control movement in the same direction as the engaging movement of the integral cross member of said hooks, and a common control for said clutch and hooks comprising a rod running longitudinally of the bed from said clutch and hooks to the foot of the bed and having means adapted to disengage said clutch and to cause said hooks to engage the projecting ends of said crosshead by movement of said rod in said direction, said rod being movable longitudinally by a control handle at the foot of the bed.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |