Vacuum brake power booster, in particular for motor vehicles

Details Vacuum brake power booster, in particular for motor vehicles Vacuum brake power booster, in particular for motor vehicles

1990-05-04

1992-03-17

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, 913692, 1376275, 251358, 92 42, F15B 910

Patent

active

050958054

ABSTRACT:
A vacuum brake power booster, in particular for motor vehicles, which includes a poppet valve (12) sealing two valve seats (18, 19) and which is axially deformable within the area of a rolling fold (15) also includes an annular part which is either mounted on the outside of the rolling fold (15) in a form-fit manner or arranged inside the elastic material (24) of the poppet valve (12). This annular part prevents the rolling fold (15) from being blown up outwardly due to the pressure differential prevailing between its two sides so that it will be possible to reduce the return force and thus also the response force.

REFERENCES:
patent: 4117769 (1978-10-01), Carre et al.
patent: 4622882 (1986-11-01), Bischoff et al.
patent: 4777868 (1988-10-01), Larsson
patent: 4884491 (1989-12-01), Endo
patent: 4885979 (1989-12-01), Macht et al.
patent: 4907494 (1990-03-01), Gautier et al.
patent: 4953444 (1990-09-01), Cunningham et al.
patent: 4970940 (1990-11-01), Boehm et al.

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