Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1982-05-05
1985-04-02
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91383, 91388, 91460, 605471, F15B 910
Patent
active
045080089
ABSTRACT:
A hydraulic brake booster includes a booster piston axially slidable in a bore of a housing and delimiting therein a boosting compartment, and a brake pedal responsive operating element which partially extends into the boosting compartment to act as a plunger therein. A control valve has a valve body which is stationary relative to the housing and a valve member which is slidably received in the valve body and controls communication of a pressure chamber with sources of control fluid at reference pressure and at control pressure, the pressure in the boosting compartment being proportionate to the pressure in the pressure chamber. A flexible elongated tubular element equidistantly interconnects the valve body with the booster piston, and an elastic body of substantially constant length, such as a cable, elastic rod, or a body of incompressible liquid, which is at least partially received in the tubular element, converts the displacement of the operating element relative to the booster piston into movement of the valve member relative to the valve body and thus controls the pressure in the boosting compartment. The pressure chamber may be filled with liquid and directly be connected with the boosting compartment, or it may be constituted by one of the two chambers of a vacuum booster having a movable wall separating the two chambers from one another and connected to a piston received in a bore containing boosting liquid and communicating with the boosting compartment.
REFERENCES:
patent: 2391819 (1945-12-01), Creson
Brosius Edward J.
IT&T Industries, Inc.
Maslousky Paul E.
Raden James B.
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