Lifting devices

Details Lifting devices Lifting devices

1977-02-03

1978-12-19

Marbert, James B.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

B66C 138

Patent

active

041303130

ABSTRACT:
To enable a lifting element such as a hook to be detached from a pulley block and lowered independently by means of a separate cable the hook is releasably secured to the block through a latch mechanism including a shaft secured to said separate cable and provided with a head member normally supported by a pair of pivoted latch plates which are displaceable into an inoperative position through a linkage system operable by raising the shaft before it is lowered and are subsequently returned to their operative position by return of the shaft to the mechanism.

REFERENCES:
patent: 3416832 (1968-12-01), Rice
patent: 3661416 (1972-05-01), Bukarkin et al.
patent: 3853082 (1974-12-01), Rosenberg et al.

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