Block and pulley arrangement

Details Block and pulley arrangement Block and pulley arrangement

1980-02-21

1983-09-13

Taylor, Billy S.

Implements or apparatus for applying pushing or pulling force

Device or member for contacting and guiding moving cable

Including rotatable, cable contacting, pulley wheel element

254416, B66D 308

Patent

active

044037660

ABSTRACT:
A hoist for lifting appliances, and more specifically a block-and-pulley arrangement, or a block-and-tackle arrangement. A plurality of pulleys is arranged between two pulley-housing parts. Each of said plurality of pulleys is supported by its own relatively short shaft. Half of the pulley-supporting shafts is supported in the upper pulley-housing part, and the other half of the pulleys is supported by partitions in the lower pulley-housing part. Pairs of partitions in the upper pulley-housing part and pairs of partitions in the lower pulley-housing part are interleaving or out of registry. The load-supporting hook has a shaft which projects vertically through both pulley-housing parts by a bearing, so that it is rotatable relative to the upper pulley-housing part. A load supporting cross-member is arranged in transverse relation to the hook-bearing shaft and the latter projects through its center. The cross-member is supported by the lower pulley-housing by the intermediary of a bearing, so that the cross-member is rotatable relative to the lower pulley-housing. This arrangement of parts ensures safe operation of the hoist, or the pulley-and-tackle arrangement, even if any of the constituent parts of the latter should break or fail.

REFERENCES:
patent: 2973942 (1961-03-01), Schaper
patent: 3863898 (1975-02-01), Brackin
patent: 4069921 (1978-01-01), Raugulis et al.
patent: 4098492 (1978-07-01), Wilkinson

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