Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Patent
1982-01-07
1984-03-27
Petrakes, John
Implements or apparatus for applying pushing or pulling force
Apparatus for hauling or hoisting load, including driven...
Device includes rotatably driven, cable contacting drum
254358, 254377, 254378, B66D 114, B66D 120, B66D 126, B66D 500
Patent
active
044389043
ABSTRACT:
Drawworks, having a single outboard brake on the drum shaft at the driller side of the drawworks instead of the pair of brakes conventionally provided at the drum ends, whereby the brake is more readily accessible for service and repairs than are the brakes of conventional apparatuses.
REFERENCES:
patent: 1179612 (1916-04-01), Clarkson
patent: 2505088 (1950-04-01), Athy
patent: 2602635 (1952-07-01), Young
patent: 2678190 (1954-05-01), Crake
patent: 2703161 (1955-03-01), Keim et al.
patent: 2775429 (1956-12-01), Ashton
patent: 3033528 (1962-05-01), Wilson
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