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
1997-09-03
2000-05-30
Walsh, Donald 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
254325, B66D 100
Patent
active
06068240&
ABSTRACT:
A method and apparatus for regulating a load compensator device for a handling gear. The load compensation device includes: a stationary internal bell housing; a mobile external bell housing which is secured at one of the ends of a handling member, from the other end of which the load is hung; and an overload pneumatic cylinder and an underload pneumatic cylinder connected to a pressure source and/or exhausted by a series of electric directional control valves. The pressure is controlled within the cylinders continuously to alter the datum position of the external bell housing that corresponds to the state of equilibrium, function of the variations in pressure which are measured at the cylinders. Changes in pressure cancels out any overload or underload effect on the load and returns the load compensator to its state of equilibrium that corresponds to the handling gear in its initial state of equilibrium.
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patent: 4126298 (1978-11-01), Lub
patent: 4724970 (1988-02-01), Kuhn
patent: 4759256 (1988-07-01), Kovit et al.
patent: 5044608 (1991-09-01), Hidaka et al.
patent: 5102102 (1992-04-01), Hidaka et al.
Marcelo Emmanuel M.
Reel SA
Walsh Donald P.
LandOfFree
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