Safety and default valve

Details Safety and default valve Safety and default valve

1998-08-25

1999-12-07

Walczak, David J.

Fluid handling

With lock or seal

1373842, 1373848, F16K 3500

Patent

active

059966130

ABSTRACT:
A safety and default valve in which a protective cup-shaped cap (11) incorporating a fixed lock (17) is housed freely rotatably on a control cap (16) with at least one engagement zone (17, 17A) for an ordinary operating wrench. A releasable engagement is provided between the bolt (19) of the lock (12) and a groove-like annular seat (18) in the control cap (16).

REFERENCES:
patent: 2092572 (1937-09-01), Deane
patent: 4716922 (1988-01-01), Camp
patent: 5094265 (1992-03-01), Jackson et al.
patent: 5797285 (1998-08-01), Sackowitz

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