Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1978-02-06
1979-03-06
Blix, Trygve M.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
303 22R, B60T 818
Patent
active
041427645
ABSTRACT:
A hydraulic pressure control valve used in a hydraulic brake system for providing a controlled hydraulic pressure thereto, wherein there are provided an hydraulic pressure relieving mechanism and a bypass mechanism adapted to release or cancel the function of a hydraulic pressure relieving mechanism. The bypass mechanism comprises a bypass route defined in a cylindrical bore defined in a casing, and a piston fitted in the cylindrical bore and adapted to open and close the bypass route and a spring to bias the piston toward a position to close the bypass route. One end of the piston is open to the atmospheric pressure, and the opposite end thereof is exerted a hydraulic pressure working thereon to bias it toward the open position of the bypass route. When a hydraulic pressure working upon the opposite end of the piston is caused to be increased to a high level enough to overcome the biasing force of the spring, the piston is actuated to move toward the position to open the bypass route, thereby releasing or cancelling the hydraulic pressure relieving function of the relieving mechanism.
REFERENCES:
patent: 3840280 (1974-10-01), Watanabe
Blix Trygve M.
Eisenzopf Reinhard J.
Toyota Jidosha Kogyo Kabushiki Kaisha
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