| 摘要 |
964,400. Apparatus for lifting invalids. SEVEN E. CORPORATION. June 24, 1963 [Oct. 2, 1962], No. 25047/63. Heading B8H. [Also in Division A6] A lifting and transporting device for incapacitated persons comprises a wheeled supporting frame, vertically spaced pairs of support arms 28, 32 and 29, 33 mounted in transversely journalled bearings, and gearing intercoupling said pairs of arms in a manner in which the load is equally distributed between the upper and lower arms. The inner ends 30, 34 and 31, 35, Fig. 4, of the arms are mutually retractable and extensible in square sectioned tubes 22, 25 rotatable in circular sectioned tubes 13, 14. The upper square tube 22 is rotated from the bottom shaft 36 by step-down sprocket and chain gearing 40, 21, 21, 23, while the lower tube 25 is similarly rotated from shaft 36 by gearing 39, 18, 19, 26. Shaft 36 is driven by worm gearing 45, 46 from shaft 47 which in turn may be driven optionally by a reversible electric motor 58, Fig. 2, through worm gearing 70, 68, Fig. 4, and clutch 60, or may be driven manually, when dog clutch 60 is in the upper position, via a bevel gear 52 and hand crank 56, Fig. 1. The inner ends 30, 34 of the arms 28, 32 are extended or retracted to a desired position by a bellcrank 80, 82 via a link 84 and rods 85, 86. The opposite arms 29, 33 become equally extended or retracted via gears 76, 77, Fig. 4, which have a fixed location in tubes 22, 25. Spirally wound leaf springs 73 acting on shaft 36 are arranged to act in a direction countering the load to take the strain when the motor or manual lifting means is inoperative. Electrical circuit diagrams are described with reference to Figs. 22, 23 (not shown).
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