Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1990-05-24
1991-12-24
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, F15B 910
Patent
active
050741918
ABSTRACT:
The pneumatic brake booster comprises a housing formed from a front and a rear half-shell 12 and 10, a piston structure dividing the housing internally into two chambers and composed of an assembly consisting of a plate 18 and of a diaphragm 20 and possessing centrally a hub structure 24 containing a distribution valve mechanism 26 actuatable by an input member 56 in order to generate a pressure difference selectively between the chambers. The valve mechanism 26 comprises a plunger 28 mounted axially slideably in a coaxial central bore 30 of the valve body and connected to the input member 56, the plunger defining a first shutter seat 32 at one of its ends, a second shutter seat 34 being formed in the valve body concentrically relative to the first shutter seat and a shutter means 36 mounted in the valve body and stressed elastically toward the first and second shutter seats, at least one elastic means 60 stressing the input member 56 axially away from the shutter seats. The hub structure 24 and the valve mechanism 26 are arranged inside the housing.
REFERENCES:
patent: 1765760 (1930-06-01), Duty et al.
patent: 2985143 (1961-05-01), Stelzer
patent: 4499812 (1985-02-01), Pressaco et al.
patent: 4718324 (1988-01-01), Gautier et al.
Bendix Europe Services Techniques
Decker Ken C.
Look Edward K.
Lopez F. Daniel
Palguta Larry J.
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