Valve lock

Details Valve lock Valve lock

1998-07-29

2000-01-04

Fox, John

Fluid handling

With casing, support, protector or static constructional...

Static constructional installations

137382, F16K 3700

Patent

active

06009897&

ABSTRACT:
The present invention relates to a valve lock for blocking access to a valve mounted in an access pipe. The valve lock includes a key housing and a key for actuating a valve lock mechanism. The key housing has a diameter less than the inner diameter of the access pipe. The valve lock mechanism includes semi-cylindrical closure wedges having inclined surfaces that are engaged by wedges. The valve lock mechanism is activated by reducing the distances between the wedges forcing the closure wedges radially outwardly so that the outer semi-cylindrical surface of the closure wedges engage the inner wall surface of the access pipe.

REFERENCES:
patent: 3227183 (1966-01-01), Hocbt
patent: 5871030 (1999-02-01), Agbey

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