Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1984-12-10
1986-02-04
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, 92 98D, 92169, 403349, F15B 910
Patent
active
045678120
ABSTRACT:
Differential pressure brake boosters are known having a reinforcement tube extending axially through the low-pressure casing with its ends fastened to both end surfaces of the casing. A mechanically actuated control valve for connecting the working chamber to the low-pressure chamber or to atmosphere is axially movable in the reinforcement tube. A sleeve surrounding a master cylinder piston push rod has radial ribs extending through longitudinal slots of the reinforcement tube to connect the push rod to the movable wall. These ribs are subjected to a high bending stress. According to the present invention the radial ribs are constructed as flat tongues disposed in a common plane, the tongues being engaged on a side thereof adjacent the low-pressure chamber by an outwardly angled collar of an extension of the housing of the control valve. The distance between the rolling diaphragm of the movable wall adjacent the reinforcement tube and the end of the longitudinal slots adjacent the work chamber is at least equal to half the power stroke of the axially movable wall.
REFERENCES:
patent: 363122 (1887-05-01), Dimick
patent: 4307570 (1981-12-01), Yardley
patent: 4338854 (1982-07-01), Margetts
Becht Reimund
Boehm Peter
Weiler Rolf
Breh Donald J.
IT&T Industries, Inc.
Maslousky Paul E.
Raden James B.
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