Fluid pressure type booster device

Details Fluid pressure type booster device Fluid pressure type booster device

1992-02-27

1993-08-10

Butler, Douglas C.

Brakes

Operators

Fluid pressure

303 52, 303 92, 3031131, 3031155, 3031191, 3031161, 605471, 60550, B60T 832

Patent

active

052340864

ABSTRACT:
A fluid pressure type booster device is capable of feeding an output pressure of a fluid pressure source in a controlled manner by permitting a slide member to slide so as to balance the force acting in an advancing direction by a fluid pressure of a pressure chamber in accordance with an operation of an operating member and the reaction force of a reaction chamber. The device includes an input piston slidably fitted in a housing to define the pressure chamber between the input piston and an interlocking member, a spring mounted in a compressed manner between the input piston and the interlocking member, and an on-off valve interposed between the pressure chamber and the fluid tank so as to be closed in accordance with an advancing movement of the input piston with respect to the interlocking member by an amount not less than a predetermined value. The spring is arranged to start contracting for closing the on-off valve in accordance with the advancing movement of the input piston from a state in which the slide member has been so advanced as to place the input port in communication with the output port.

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patent: 4964676 (1990-10-01), Resch
patent: 4995677 (1991-02-01), Matsuda et al.
patent: 5024056 (1991-06-01), Zivkovic
patent: 5106170 (1992-04-01), Matsuda et al.

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