Cranes with look independent of sheave block

Details Cranes with look independent of sheave block Cranes with look independent of sheave block

1975-01-28

1976-07-06

Werner, Frank E.

Traversing hoists

Overhead

Cable

254194, B66C 2352

Patent

active

039677354

ABSTRACT:
A crane is provided with a sheave-block, a winch for lifting and lowering the sheave-block, a crane hook, spring-loaded catches for demountably attaching the crane hook to the sheave-block, and a tension-imparting winch unit for lifting and lowering the crane hook independently of the sheave-block the tension-imparting winch unit being provided with an "over-riding" device whereby tension on the winch cable is removed.

REFERENCES:
patent: 816698 (1906-04-01), Yentzer
patent: 2973942 (1961-03-01), Schaper
patent: 3193116 (1965-07-01), Kenneday et al.
patent: 3306469 (1967-02-01), Durand
patent: 3365075 (1968-01-01), Gils et al.

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