Security mechanism for pipe flanges

Details Security mechanism for pipe flanges Security mechanism for pipe flanges

1983-04-11

1986-02-25

Wolfe, Robert L.

Locks

Special application

For control and machine elements

F16B 4100

Patent

active

045719667

ABSTRACT:
This locking mechanism incorporates mechanical objects such as pipe flanges having locking receptacles through which extend a retaining pin having a retaining sleeve threadedly received thereby and secured by means of a locking ring. Both the retaining pin and retaining sleeve can be installed and removed only by means of specifically designed installation tools. A locking plug is also received within one of the flange receptacles and is secured by a plug retainer pin. The locking plug can be installed and removed only be means of a removal key which is retained by authorized personnel. Sealing plugs secure the retaining pin and plug retainer pin in encapsulated position within the pipe flanges and thereby prevent tampering.

REFERENCES:
patent: 3519979 (1970-07-01), Bodenstein
patent: 3785670 (1974-01-01), Smith
patent: 4253509 (1981-03-01), Collet
patent: 4358941 (1982-11-01), Zimmer
patent: 4428211 (1984-01-01), Hermann
patent: 4480513 (1984-11-01), McCauley

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