Rolling diaphragm apparatus

Details Rolling diaphragm apparatus Rolling diaphragm apparatus

1979-12-13

1981-12-01

Hershkovitz, Abraham

Expansible chamber devices

With cushioning means effective over a portion only of stroke

92 98D, F01B 1102

Patent

active

043030068

ABSTRACT:
This invention relates to a rolling diaphragm apparatus in which an annular diaphragm is secured by its outer and inner peripheries respectively to a housing and a piston between which the diaphragm seals against fluid leakage. One of said peripheries is formed as a bead which locates in an annular seat on the part to which said one periphery is attached, the bead being retained on its seat by a resilient retaining ring that snaps into position on the seat part. The bead has a substantially radially directed face and a substantially axially directed face, both of said faces engaging with corresponding faces on the retaining ring which snaps into positive engagement with the seat part.
Such a construction is particularly useful in vacuum boosters for motor vehicle braking systems.

REFERENCES:
patent: 3053235 (1962-09-01), Hager
patent: 3076441 (1963-02-01), Ayers, Jr.
patent: 3183789 (1965-05-01), Stelzer
patent: 3352209 (1967-11-01), Cripe
patent: 3577832 (1971-05-01), Parsons
patent: 3593956 (1971-07-01), McCarty, Jr.
patent: 3656413 (1972-04-01), Eggstein
patent: 4043251 (1977-08-01), Ohmi

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