Lock for an oil field valve

Details Lock for an oil field valve Lock for an oil field valve

1986-08-11

1987-05-05

Wolfe, Robert L.

Locks

Special application

For control and machine elements

70184, 70232, B60R 2502

Patent

active

046621962

ABSTRACT:
An anti-theft lock for oilfield valves where a base member fits over and attaches to a valve so that the valve stem projects outwardly of the base member. A cover member has pins received in locking bores in the base member where independent keys operate independent locks to lock the cover member to the base member.

REFERENCES:
patent: 2377036 (1945-05-01), Quarfoot
patent: 3172282 (1965-03-01), Heckrotte
patent: 3500130 (1971-02-01), Horhota
patent: 3540468 (1970-11-01), Finck
patent: 4208893 (1980-06-01), Avrich
patent: 4377178 (1983-03-01), Thompson

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