Method for controlling application of brakes in single drum...

Details Method for controlling application of brakes in single drum... Method for controlling application of brakes in single drum...

2008-04-08

2008-04-08

Marcelo, Emmanuel M (Department: 3654)

Implements or apparatus for applying pushing or pulling force

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

Device includes rotatably driven, cable contacting drum

C254S277000

Reexamination Certificate

active

11525955

ABSTRACT:
A method of damping the oscillations during an emergency stop of an ascending single drum hoist system in a shaft having a conveyance, the mechanical brakes applying a braking force to the drum and the drum rotating in a first direction having a speed, comprising applying a first brake force when the drum speed reaches close to zero enabling the drum to roll back in an opposite direction to the first direction by a force generated from a first conveyance downward swing, and controlling the brake force during the first conveyance downward swing to dissipate the energy of the swing.

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patent: 2005/0114001 (2005-05-01), Newman

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