Vacuum power brake booster

Details Vacuum power brake booster Vacuum power brake booster

1984-08-22

1986-02-25

Maslousky, Paul E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, 251121, F15B 910

Patent

active

045720550

ABSTRACT:
A power brake booster, in which the valve piston is slidably supported in the control hub and cooperates with the poppet valve, that is formed of any rubber-elastic material. The poppet valve is designed as a cone valve. Thus when the valve passage is opened, atmospheric air enters the working chamber from the air chamber through the opening, that is arranged in the control hub transversely to the booster's longitudinal axis, to flow in almost undisturbed and without turbulence. To ensure a reliable sealing seat, the peripheral surface of the truncated-cone-shaped end of the valve piston is equipped with a curcumferential groove, the one lateral wall of the groove forming together with the peripheral surface a sealing edge which reliably abuts on the plane plate surface of the poppet valve when the valve is closed.

REFERENCES:
patent: 1844631 (1932-02-01), Bragg et al.
patent: 1846023 (1932-02-01), Bragg et al.
patent: 3410178 (1968-11-01), Kytta
patent: 4358990 (1982-11-01), Takeuchi

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