Implements or apparatus for applying pushing or pulling force – Single throw lever – Lazy tongs
Patent
1983-12-19
1985-12-03
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Single throw lever
Lazy tongs
5 63, B66F 322
Patent
active
045561982
ABSTRACT:
A lifter for supporting a hospital bed and for adjusting the height of the same. The lifter includes an upper frame supporting the bottom of the bed, a lower frame disposed on the floor, a link mechanism extending between the upper and lower frames and made vertically expandible and collapsible when actuated and released, and a hydraulic cylinder for actuating and releasing the link mechanism. The link mechanism includes a first pair of right and left link arms each having one end fixed at and rotatably borne on either of the upper and lower frames and its other free end carried longitudinally movably on the other frame. A second pair of right and left link arms intersect, in a side view, with the link arms of the first pair, respectively, and each has one end fixed at and rotatably borne on the other frame and its other free end carried longitudinally movably on the one frame. The bearings, the rollers and the guide rails are generally transversely aligned so that they are prevented from overlying one another, whereby the link arms of the first and second pairs can be folded to assume generally horizontally and longitudinally extending positions.
REFERENCES:
patent: 2501001 (1950-03-01), Neely
patent: 3282566 (1966-11-01), Clarke
patent: 3373453 (1968-03-01), Goodman
patent: 4092011 (1978-05-01), Luebke
Fuji Electric & Co., Ltd.
Watson Robert C.
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