Safety device for an air balancing hoist

Details Safety device for an air balancing hoist Safety device for an air balancing hoist

1993-03-12

1994-12-06

Stodola, Daniel P.

Implements or apparatus for applying pushing or pulling force

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

Device includes rotatably driven, cable contacting drum

254383, 92 31, 92 85B, B66D 110, F01B 300

Patent

active

053703677

ABSTRACT:
A safety device for an air balancing hoist includes one or more piston and cylinder shock absorbers engaged by one end of the drum ball nut, which creates a substantial retarding force at high speed but does not generate significant impeding forces at low speeds.

REFERENCES:
patent: 3160360 (1964-12-01), Spieldiener et al.
patent: 3260508 (1966-07-01), Powell
patent: 3311351 (1967-03-01), Blakely
patent: 3368796 (1968-02-01), Ulbing
patent: 3428298 (1969-02-01), Powell
patent: 3526388 (1970-09-01), Geiger et al.
patent: 4210064 (1980-07-01), Beerens
patent: 4566375 (1986-01-01), van der Schoot
patent: 4625933 (1986-12-01), Luciano et al.
patent: 4722422 (1988-02-01), Hiraoka

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