Two-way vent valve

Details Two-way vent valve Two-way vent valve

1995-05-15

1996-03-19

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

1375124, 22020316, F16K 1719

Patent

active

054996546

ABSTRACT:
A liquid tank cap incorporates a two-way relief valve in which an annular valve disc has one side sealed against a seal adjacent to its inner diameter and the other side sealed against a seal adjacent to its outside diameter. When subjected to a pressure differential in either direction, the disc deflects so as to increase its concavity and allow air passage by one or the other seal, depending upon whether the pressure in the tank is subatmospheric or superatmospheric.

REFERENCES:
patent: 2679946 (1954-06-01), Friend
patent: 3124488 (1964-03-01), Ruetschi
patent: 3138173 (1964-06-01), Hartman
patent: 3319879 (1967-05-01), Brown
patent: 3430648 (1969-03-01), Botkin
patent: 3820561 (1974-06-01), Papst et al.
patent: 4440308 (1984-04-01), Baker
patent: 4922954 (1990-05-01), Blomquist
patent: 5347813 (1994-09-01), Yanagi

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