Vacuum booster

Details Vacuum booster Vacuum booster

1976-12-03

1978-10-03

Maslousky, Paul E.

Motors: expansible chamber type

Relatively movable working members with one having motive...

91369A, 92 42, 92 48, 92 63, F01B 700, F15B 910, F01B 1900, F16J 304

Patent

active

041177690

ABSTRACT:
A servomotor for power actuation of a mechanical or hydraulic control, for example brake master cylinders for motor vehicles, is disclosed. The servomotor includes a housing in which a power piston separates a low pressure chamber from a high pressure chamber. The power piston being movable from an idle position in response to a pressure difference between the chambers. The pressure difference being controlled by a valve associated with an inlet control member. An auxiliary power member is located in the high pressure chamber. The auxiliary power member has a pressure compartment connectible to an external pressure source. The auxiliary power member is adapted to move the power piston from its idle position irrespective of the establishment of the pressure difference, to permit the servomotor to be used in an automatic or emergency service brake system.

REFERENCES:
patent: 3780620 (1973-12-01), Gardner

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