Hydraulic boosters for vehicle braking systems

Details Hydraulic boosters for vehicle braking systems Hydraulic boosters for vehicle braking systems

1982-10-07

1984-09-04

Maslousky, Paul E.

Power plants

Pressure fluid source and motor

Pulsator

605471, 91173, 91369A, 91378, 91417R, 92128, F15B 910, F15B 1517

Patent

active

044689276

ABSTRACT:
An hydraulic booster has a housing provided with a bore, an inlet connected to a source of high pressure fluid, an outlet connected to a reservoir and a boost piston working in the bore. The boost piston is advanced in response to pressurization of a boost chamber by fluid from the source, under the control of a valve mechanism operated by an input member. The diameters of the bore and the boost piston are arranged to provide an annular chamber round the boost piston connected to the inlet, with the sealing diameter at the rearward end greater than that at the forward end of the chamber, where the boost piston is spaced from the bore. The forward end is sealed by a seal mounted in the bore so that it is radially deformable and able to tolerate the radial clearance between the piston and the bore. The seal is preferably a P.T.F.E. ring backed by an O-ring.

REFERENCES:
patent: 2916882 (1959-12-01), Spalding et al.
patent: 4319455 (1982-03-01), Schubert

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