Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1985-02-20
1987-02-17
Garrett, Robert E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, F15B 910
Patent
active
046430750
ABSTRACT:
In a vacuum-operated brake power booster, a rubber reaction disc is arranged between a valve piston accommodated in the control housing and the push-rod co-acting with the piston of the master cylinder. The disc features a substantially circular truncated cone-shaped configuration, and is retained in a recess of the control housing in such a manner that its smaller circular disc-shaped frontal area faces the valve piston. The recess in the control housing is partly configured as a cylindrical bore and is furnished at its control piston-side end with a funnel-shaped portion against which a truncated cone-shaped portion of the rubber reaction disc is abutted. Notwithstanding the utilization of a highly soft rubbery-elastic material, the partly truncated cone-shaped configuration of the rubber reaction disc renders possible a very short overall length of the control assembly.
REFERENCES:
patent: 3172334 (1965-03-01), Wuellner et al.
patent: 3209657 (1965-10-01), Randol
patent: 4487105 (1984-12-01), Harrison
Breh Donald J.
Garrett Robert E.
IT&T Industries, Inc.
Raden James B.
Williamson Mark A.
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