Hand operated hoist having improved means controlling free rotat

Details Hand operated hoist having improved means controlling free rotat Hand operated hoist having improved means controlling free rotat

1981-04-02

1984-03-13

Marbert, James B.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

254358, B66D 104

Patent

active

044363338

ABSTRACT:
A hand-operated hoist which hoists or hauls a load by operation of a hand-operated driving member to drive a drive shaft such that a sheave shaft having a load sheave is driven to move a load chain engageable therewith. The drive shaft is axially movable and a clutch mechanism is provided which controls, through the axial movement of the drive shaft, the freely rotatable condition of the sheave shaft such that, when the load sheave bears no load, the hand-operated driving member is reversely rotated to allow the sheave shaft to be freely rotatable.

REFERENCES:
patent: 3369795 (1968-02-01), Fujita
patent: 3894720 (1975-07-01), Koji

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