Power plants – Pressure fluid source and motor – Pulsator
Patent
1978-07-31
1980-04-01
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
60548, 60582, 91170R, 91510, B60T 1312
Patent
active
041954840
ABSTRACT:
A vehicle brake booster and master cylinder assembly has a vacuum suspended booster section which is controlled by movement of the vehicle brake pedal. A hydraulic booster section is in series with the vacuum suspended booster section, and a master cylinder unit is in series with the hydraulic booster section. The assembly is so interconnected that the master cylinder can be operated manually when there is no or insufficient power pressure to operate either booster section. It may also be operated by actuating the vacuum suspended booster section, and, when no hydraulic pressure is available to the hydraulic booster section, this operation may be followed by manual actuation. It may be operated by initially actuating the hydraulic booster section when there is no vacuum available for initially operating the vacuum suspended booster section, followed by manual actuation as needed. In one embodiment the assembly utilizes a single hydraulic fluid for the hydraulic booster section and for the master cylinder and brake apply circuitry. In another embodiment the hydraulic booster section is operated by a separate fluid circuit which is fluidly independent of the master cylinder and brake apply pressure circuitry.
REFERENCES:
patent: 3195309 (1965-07-01), Cripe
patent: 3766735 (1973-10-01), Nordeen
patent: 3813992 (1974-06-01), Brown
Mathues Thomas P.
Parker Donald L.
General Motors Corporation
Hershkovitz Abraham
McGraw D. D.
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