Power plants – Pressure fluid source and motor – Pulsator
Patent
1977-01-06
1978-10-24
Schwadron, Martin P.
Power plants
Pressure fluid source and motor
Pulsator
B60T 1718
Patent
active
041214218
ABSTRACT:
A hydraulic brake booster includes a housing defining a pressure chamber and an inlet port communicating pressurized fluid to an accumulator and the pressure chamber. The housing includes a bore which slidably receives a charging valve and sealingly receives a check valve. The charging valve sealingly engages the housing bore via a sealing ring in one position and is pressure responsive to move toward a second position abutting the check valve to open communication between the inlet port and the accumulator. A stem is slidably carried in a passage in the check valve and the stem is received in a slot in the charging valve. An operator actuator is engageable with the stem to unseat one end of the stem from the check valve so that pressurized fluid from the accumulator is communicated to the pressure chamber. Moreover, the slot on the charging valve permits communication between the inlet port and the pressure chamber when the accumulator pressure is below the pressure at the inlet port and the operator actuator is unseating the stem from the check valve. In addition, the charging valve and housing bore include substantially parallel tapered surfaces that oppose frusto conical surfaces on the sealing ring that are substantially parallel to the tapered surfaces and between the housing bore and charging valve to seal the accumulator from the inlet port when the sealing ring is engaging the housing bore and the charging valve.
REFERENCES:
patent: 3638528 (1972-02-01), Lewis
patent: 3889467 (1975-06-01), Huffman
patent: 3955597 (1976-05-01), Oneyama
Jackson Robert W.
Myers Bruce B.
Decker Ken C.
Hershkovitz Abraham
Schoenle Paul David
Schwadron Martin P.
The Bendix Corporation
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