Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1983-02-25
1984-09-04
Levy, Stuart S.
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254352, 254353, 254357, 74577M, 192 431, 192 93A, B66F 1900, B66F 330, G05G 112, F16D 1342
Patent
active
044693087
ABSTRACT:
A lever hoist comprises a change gear provided in a driving shaft for driving a sheave for winding-up a chain or rope for a load, an operating lever rockably driven by a hand, winding-up and winding-off driving pawls engageable with teeth of the change gear and changeable in response to the purpose of hoisting or lowering the load, and a braking assembly for preventing the change gear from being driven by a gravity of the load and having a spring for releasing the braking assembly. According to the invention the lever hoist further comprises a brake spring control member rotatably fitted on the driving shaft, a brake clamping spring arranged between the driving member and the brake spring control member, and a direction change transmission mechanism for transforming rotation of the brake spring control member into axial urging force of the brake clamping spring. The lever hoist is capable of lifting and lowering even a light load by repeatedly rocking the operating lever and includes the brake spring control member which is rotated to release the brake clamping and hence the load sheave into a freely rotatable condition.
REFERENCES:
patent: 1903218 (1933-03-01), Knight
patent: 2243361 (1941-05-01), Stahl
patent: 2827994 (1958-03-01), Tiedeman et al.
patent: 3047114 (1962-07-01), Stevens
patent: 3100031 (1963-08-01), Lock
patent: 3740146 (1973-06-01), Wilharm
Akiyama Teruo
Maeda Kazuo
Nakamura Takayoshi
Ohno Masayuki
Hail III Joseph J.
Kabushiki Kaisha Kito
Levy Stuart S.
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