Brake for a hoisting apparatus

Details Brake for a hoisting apparatus Brake for a hoisting apparatus

1995-10-03

1998-01-20

Poon, Peter M.

Brakes

Operators

Multiple

188 716, 254377, 254379, F16D 6514, B66D 502

Patent

active

057092850

ABSTRACT:
A brake for a hoisting apparatus including a hoisting line, a drum for the hoisting line, a hoisting motor and a brake system for braking of the hoisting cable, the brake system consisting of a hydraulic brake and a mechanical brake. The mechanical and the hydraulic brakes are connected to a common transmission which is driven by the drum when this rotates freely, and the mechanical and the hydraulic brakes are controlled by a common controller for controlling the distribution of braking power between the two brakes. The control system distributes the braking power automatically between the brake systems. The transmission can also be connected to an autodriller for controlling the weight on the bit.

REFERENCES:
patent: 1746371 (1930-02-01), Turnbull et al.
patent: 1992911 (1935-02-01), De La Mater
patent: 1992912 (1935-02-01), De La Mater
patent: 2883013 (1959-04-01), Keith et al.
patent: 4043434 (1977-08-01), Braschler
patent: 4207969 (1980-06-01), Howell
patent: 4324387 (1982-04-01), Steinhagen
patent: 4875530 (1989-10-01), Frink et al.

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