Vacuum brake force booster with booster-side valve air intake

Details Vacuum brake force booster with booster-side valve air intake Vacuum brake force booster with booster-side valve air intake

1990-07-17

1991-07-16

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, 92 78, B60T 1352

Patent

active

050315072

ABSTRACT:
A boot (19) protecting the pedal-sided end (18) of the control valve housing (5) of a vacuum brake force booster is fixed by a spacer. The spacer is preferably configured as a dual-walled annular sleeve (20). It is axially secured in the same position as a ring sealing the control valve housing (5) against the booster housing (1). An axial extension (26) of sleeve (20) insures that the boot (19) is kept remote from the booster housing (1) and from the control valve housing (5), respectively, so that air can be taken in between boot (19) and control valve housing (5) for ventilating the working chamber (3). This design allows the air required for ventilation to travel very closely to the baffle wall, thereby minimizing noise in the passenger cabin of the automobile.

REFERENCES:
patent: 3727516 (1973-04-01), Myers et al.
patent: 3921501 (1975-11-01), Rosback
patent: 4587884 (1986-05-01), Tsubouchi
patent: 4716814 (1988-01-01), Yamakoshi

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