Power plants – Pressure fluid source and motor – Pulsator
Patent
1982-09-27
1984-07-10
Garrett, Robert E.
Power plants
Pressure fluid source and motor
Pulsator
60548, 60574, 60581, 60582, B60T 1360
Patent
active
044584903
ABSTRACT:
A dual power brake booster assembly in which the hydraulic boost section is initially operated, the vacuum booster section is then operated to runout while the hydraulic section maintains a hydraulic boosted force level, the hydraulic section is then further operated to further increase the hydraulic boosted force as the vacuum booster section maintains the vacuum boosted force level attained by it at runout, and additional master cylinder actuation by additional manual force. The invention also includes the method of generating brake actuating pressure. The brake booster assembly may be operated only to the extent necessary to produce the desired amount of master cylinder actuation. The booster assembly will operate when the power source for one section is diminished or not available. It is also operable manually when pressure from neither power source is available.
REFERENCES:
patent: 4072085 (1978-02-01), Soupal
patent: 4107926 (1978-08-01), Adachi
patent: 4110985 (1978-09-01), Gordon et al.
patent: 4198823 (1980-04-01), Mathues et al.
Garrett Robert E.
General Motors Corporation
McGraw D. D.
Moritz Scott L.
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