Check valve with inspection means

Details Check valve with inspection means Check valve with inspection means

1982-03-15

1984-06-12

Nilson, Robert G.

Fluid handling

Systems

With flow control means for branched passages

137539, 137559, 137886, F16K 1504

Patent

active

044535694

ABSTRACT:
A check valve incorporating inspection valve means therein for disclosing the presence or absence of fluid on the "upstream" side of the valve.

REFERENCES:
patent: 1891586 (1932-12-01), Woerner
patent: 2184643 (1939-12-01), Holmboe
patent: 3289694 (1966-12-01), Frye
patent: 4216907 (1980-08-01), Fuller

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