Butterfly valve safety lock

Details Butterfly valve safety lock Butterfly valve safety lock

1995-12-26

1997-02-04

Gall, Lloyd A.

Locks

Special application

For control and machine elements

70180, 70203, 137385, F16K 3506

Patent

active

055987249

ABSTRACT:
A safety lock device for use in releasably locking the head of a butterfly valve. The two part safety lock device comprises first: a cross-sectionally U-shape elongated frame, having an anchoring part at one end and a lateral flange with a number of bores; the anchoring part releasably engages with the valve head for anchoring the U-frame to the valve head; the elongated channel is sized for full engagement by the valve handle; and second: a casing, with an inner passageway, sized for through engagement by the U-frame, and a lateral pocket extension with a number of bores, for engagement by the lateral flange. The casing is characterized by a wedge part, integrally depending therefrom and sized for engagement between the diverging distal end portions of the valve handle and lever. Padlocks releasably interlock the U-frame to the casing by engaging selected pairs of flange bores and pocket bores, thereby concurrently locking the valve lever in its divergent relation to the valve handle.

REFERENCES:
patent: 1245770 (1917-11-01), Rideout
patent: 5052939 (1991-10-01), Koch
patent: 5165263 (1992-11-01), Perron et al.
patent: 5222382 (1993-06-01), De Vizzi
patent: 5299597 (1994-04-01), Fort et al.

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