Return assembly for a swivable sheave

Details Return assembly for a swivable sheave Return assembly for a swivable sheave

1979-12-27

1981-12-15

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

254393, 254415, B66D 304

Patent

active

043055729

ABSTRACT:
In a machine having a boom, a sheave swivably mounted on the boom and a line reeved over and around the sheave, an assembly for returning the sheave to a predetermined position relative to the boom upon the sheave being rotatably displaced about its swivel axis by forces applied by the line, consisting of a righting arm operatively connected to the sheave for rotatable movement therewith about the swivel axis and means operatively engageable with the righting arm for rotatably biasing the righting arm and correspondingly the sheave about the swivel axis toward the predetermined position.

REFERENCES:
patent: 21602 (1858-09-01), Focht
patent: 998385 (1911-07-01), Owen
patent: 1906665 (1933-05-01), Ticknor
patent: 3757959 (1973-09-01), Thompson et al.
patent: 4053139 (1977-10-01), Lovaas et al.

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