Load limiting apparatus for hoists

Details Load limiting apparatus for hoists Load limiting apparatus for hoists

1982-06-03

1984-08-21

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

254372, 464 46, 192 56R, B66D 316, F16D 702

Patent

active

044665989

ABSTRACT:
The improved load limiting apparatus includes a chainwheel that is mounted on the hoist drive shaft and adapted to receive the drive chain. The chainwheel includes a hub connected to the drive shaft, an annular clamping member located in juxtaposition to the hub and adjustably attached thereto, and an annular chainwheel rim located in encircling relationship to the hub and clamping member and having a bifurcated flange in frictional engagement with the hub and clamping member, whereby the rim can move relative to the hub and clamping member after a pre-determined torque load is imposed on the rim by the drive chain.

REFERENCES:
patent: 1190482 (1916-07-01), Tibbals
patent: 2753703 (1956-07-01), McIntyre
patent: 3090601 (1963-05-01), Robins
patent: 3220702 (1965-11-01), Caldwell
patent: 3724815 (1973-04-01), Hawkins et al.
patent: 3797621 (1974-03-01), James
patent: 3953000 (1976-04-01), Zorbaugh

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