Mechanically controlled power booster

Details Mechanically controlled power booster Mechanically controlled power booster

1990-10-09

1992-04-21

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, F15B 910

Patent

active

051057220

ABSTRACT:
In order to eliminate the noises caused on operation of a vacuum brake power booster, a radially outwardly extending air-conducting surface (26), which tapers toward a poppet valve member (7) closing a sealing seat (19) and which is opposite to the channel (25) on actuation, is adjacent to the radially outwardly disposed area of the sealing seat (19) designed on a valve piston (10), the sealing seat being released on displacement of the valve piston (10) and permitting inflow of the atmospheric air into the working chamber (3) of the booster via a radially extending channel (25).

REFERENCES:
patent: 1630973 (1927-05-01), Schmidt
patent: 2690767 (1954-10-01), Sage
patent: 3556070 (1971-12-01), Holcomb
patent: 3691903 (1972-09-01), Shellhanse
patent: 3857542 (1974-12-01), Heymann
patent: 4716814 (1988-01-01), Yamakoshi
patent: 4718327 (1988-01-01), Myers
patent: 4936195 (1990-06-01), Uyama

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