Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1985-03-26
1986-12-23
Hershkovitz, Abraham
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
92 99, 92169, F15B 910
Patent
active
046305254
ABSTRACT:
A vacuum booster assembly comprises front and rear shells of pressed sheet metal coupled to each other at their annular opening end portions, a power piston housed within the coupled shells, a diaphragm member attached to a pressure receiving portion of the power piston and having an outer annular bead clamped between the annular opening end portions of the shells, an inner annular bead coupled over a cylindrical portion of the power piston, a flexible portion extending along the contour of the pressure receiving portion of the power piston, and a pair of support portions formed to correspond with a pair of radial recesses formed in the pressure receiving portion of the power piston, a pair of support members attached to the support portions of the diaphragm member in such a manner to permit axial movement of the power piston, and a pair of tie bars extending in parallel respectively across the front shell, the support member, the support portion of the diaphragm member and the rear shell and fastened at opposite ends thereof to the front and rear shells to clamp the support portions of the diaphragm member between the support members and the rear shell.
REFERENCES:
patent: 4270438 (1981-06-01), Thomas
patent: 4271750 (1981-06-01), Thomas
patent: 4339921 (1982-07-01), Schanz
patent: 4377069 (1983-03-01), Kobayashi
Aisin Seiki Kabushiki Kaisha
Hershkovitz Abraham
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