Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1994-10-03
1996-04-16
Nguyen, Hoang
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, 92 48, F15B 910
Patent
active
055072160
ABSTRACT:
In a tandem type vacuum booster a coupling cylinder extending from the inner peripheral edge of a front booster piston is coupled to a piston boss with bolts, and the inner peripheral bead of the front diaphragm is held inserted between the front booster piston and the piston boss in which the coupling cylinder is increased in rigidity so that seal members are prevented from being adversely affected in seal characteristic by the deformation of the coupling cylinder, a reinforcing cylinder of synthetic resin which has an inward flange at the front end is fitted in the coupling cylinder extending from the inner peripheral edge of a front booster piston, and the reinforcing cylinder is held on the bottom plate of the coupling cylinder by the elastic force of a return coil spring applied to the inward flange. It is unnecessary to provide a particular mounting member for the reinforcing cylinder.
REFERENCES:
patent: 4813337 (1989-03-01), Endo
patent: 4987824 (1991-01-01), Shinohara et al.
patent: 5056413 (1991-10-01), Kaub
patent: 5367941 (1994-11-01), Gautier et al.
Nguyen Hoang
Nissin Kogyo Co. Ltd.
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