Patent ID: 6253882
Filing Date: 2001-07-03
Classification: F16D

Abstract:
A hydraulic brake for a power mechanism including two ports, the brake comprising a housing, a shaft, said shaft being rotatively connected to said housing,braking plates, said braking plates connected to said shaft for rotation therewith,reaction plates, said reaction plates being connected to said housing, said reaction plates adjoining said braking plates respectively,a cavity in said housing, an activation piston, said activating piston being in said cavity in said housing, means for said activating piston to cause physical braking contact between said braking plates and said reaction plates,spring means to bias said activating piston in one direction,seal means to define a cavity between part of said activating piston and said housing,means to connect said cavity to one port of said power mechanism so as to operate the brake in the opposite direction of said spring means on pressurization of one port of the power mechanism,a second seal means to define a second cavity between part of said activating piston and said housing, said second cavity being fluidically distinct from said cavity,and means to connect said second cavity to the other port of the pressure mechanism so as to operate the brake also in the opposite direction of said spring means on pressurization of the other port of the power mechanism.