Vacuum booster with dual durometer reaction disc

Details Vacuum booster with dual durometer reaction disc Vacuum booster with dual durometer reaction disc

1991-02-13

1991-10-08

Look, Edward K.

Motors: expansible chamber type

Working member position responsive motive fluid control

Working member carries part within working chamber which...

F15B 910

Patent

active

050543709

ABSTRACT:
A power booster assembly, has a dual-durometer reaction disc instead of the disc having a single durometer value throughout. The disc has an outer annular portion of a higher durometer value than the durometer value of the disc inner center portion. The higher durometer value is preferably on the order of 80 durometer and the lower durometer value is preferably on the order of 45 durometer. The outer annular portion transmit part of the reaction force to the booster power wall, and the inner center portion transmit the remainder of the reaction force to the reaction piston and thence to the booster input member. The disc may be made as a unitary part or may be made in two parts with the inner center portion being later inserted into and mechanically interlocked with the outer center portion.

REFERENCES:
patent: 3132567 (1964-05-01), Ingres et al.
patent: 4643075 (1987-02-01), Wagner
patent: 4719842 (1988-01-01), Gautier
patent: 4984506 (1991-01-01), Perez

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