Fluid-pressure operated servo-motor assemblies

Details Fluid-pressure operated servo-motor assemblies Fluid-pressure operated servo-motor assemblies

1979-02-16

1981-01-27

Christian, Leonard D.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91455, F15B 910

Patent

active

042468310

ABSTRACT:
A fluid-pressure operated servo-motor assembly transmits an effort from a pedal to a master cylinder for wheel brakes. The assembly includes in a housing, a pedal-operated input member, an output member acting on the master cylinder and a movable wall for transmitting the effort between them. The effort is augmented by fluid pressure in a boost chamber acting on the movable wall. The boost pressure is controlled by a valve in a stationary part of the housing. An operating assembly controls operation of the valve, and comprises a non-rotatable operating member, and a rotatable actuating member co-operating with the valve.
To ensure positive operation of the valve, a helical engagement provided between the operating and actuating members, and the co-operation of the valve with the actuating member are arranged so that relative axial movement between the members causes rotation of the actuating member to operate the valve.

REFERENCES:
patent: 3824277 (1974-09-01), Yabuta et al.
patent: 3951043 (1976-04-01), Keady
patent: 3994204 (1976-11-01), Hayashida
patent: 4022111 (1977-05-01), Taft
patent: 4179980 (1979-12-01), Kito et al.

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