Hydraulic brake booster with tubular conduit return spring

Details Hydraulic brake booster with tubular conduit return spring Hydraulic brake booster with tubular conduit return spring

1985-04-29

1988-07-05

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Pulsator

60565, 92130R, 267286, B60T 1300

Patent

active

047546042

ABSTRACT:
A hydraulic booster in which the booster piston return spring is formed as a tubular conduit to conduct hydraulic supply pressure to a closed center valve. Upon actuation, the valve opens to permit supply pressure to flow into the power chamber and by valving action controls the exhaust of pressure from the power chamber so as to establish the desired actuating pressure therein. The tubular conduit forming the power piston return spring and transporting the supply pressure to the closed center valve permits a shorter overall axial length of the hydraulic booster by accomodating the movement of the supply pressure chamber at the closed center valve. It also permits less charged supply pressure leaking by accomodating a better pressure seal arrangement.

REFERENCES:
patent: 2601085 (1952-06-01), Brunner
patent: 3199540 (1965-08-01), Forster
patent: 4283009 (1981-08-01), Deem
patent: 4421330 (1983-12-01), Burke
patent: 4566275 (1986-01-01), Farr
patent: 4633907 (1987-01-01), Adams
Warring, R. H., Seals and Sealing Handbook, 1st ed., Houston, Texas, Gulf Pub. Co. 1981, pp. 291, 326.

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