Hydraulically actuated portable hoist

Details Hydraulically actuated portable hoist Hydraulically actuated portable hoist

1996-04-01

1997-03-18

Matecki, Katherine

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

254323, 254361, B66D 110, F01B 300

Patent

active

056115229

ABSTRACT:
A hoist is operated by a pair of hydraulic cylinders having output rods engaging a spool drum to selectively axially displace the drum on a ball screw to cause wind up of a load cable. The hoist is mounted on a mast and boom supported by a wheeled cart, with a battery powering a pump motor to raise the load. A selectively disabled check valve allows the weight of the load to lower itself by forcing fluid past the disabled check valve, returning the fluid to a reservoir.

REFERENCES:
patent: 3003748 (1961-10-01), Musser
patent: 3428298 (1969-02-01), Powell
patent: 3675899 (1972-07-01), McKendrick
patent: 3791627 (1974-02-01), Stone et al.
patent: 4227680 (1980-10-01), Hrescak
patent: 4623124 (1986-11-01), Lewis
patent: 5046402 (1991-09-01), Lagace
patent: 5205544 (1993-04-01), Kroeger
patent: 5370367 (1994-12-01), Zaguroli, Jr.
patent: 5492306 (1996-02-01), Zaguroli
patent: 5522581 (1996-06-01), Kulhavy
patent: 5553832 (1996-09-01), Zaguroli, Jr.

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