Pressure vacuum relief valve assembly

Details Pressure vacuum relief valve assembly Pressure vacuum relief valve assembly

1974-09-09

1976-02-10

Price, William

Receptacles

Closures

With condition responsive vent or valve

220303, B65D 5116

Patent

active

039373584

ABSTRACT:
A pressure vacuum relief assembly for a container includes a housing with a first port in communication with the container and a second port in communication with atmosphere; the housing encloses improved vacuum and pressure relief valve means including first and second diaphragm members each having central openings therein engageable with conical surfaces on vacuum relief and pressure relief seal members; said first and second diaphragms form a control chamber in communication with the first port which is selectively pressurized to cause selective snap movement of each of the diaphragms to control flow across the seal members between atmosphere and the container.

REFERENCES:
patent: 2467088 (1949-04-01), Konchan
patent: 2613012 (1952-10-01), Taylor et al.
patent: 3023924 (1962-03-01), Boyer
patent: 3189072 (1965-06-01), Starr
patent: 3667642 (1972-06-01), Blau et al.
patent: 3706617 (1972-12-01), Stark et al.
patent: 3724707 (1973-04-01), Burgess
patent: 3724708 (1973-04-01), Burgess
patent: 3757987 (1963-09-01), Marshall et al.
patent: 3809282 (1974-05-01), Blau et al.
patent: 3858751 (1975-01-01), Gendes

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