Adjustable lockout device for knife gate valves

Details Adjustable lockout device for knife gate valves Adjustable lockout device for knife gate valves

1999-02-01

2000-04-04

Lee, Kevin

Fluid handling

With lock or seal

Locks against rotary motion

251 90, 70177, F16K 3500

Patent

active

060448601

ABSTRACT:
A lockout device is designed for use with a valve having a pair of spaced apart, generally opposed abutment surfaces, with at least one of the abutment surfaces being shiftable relative to the other in such manner that the spacing between the surfaces decreases when the valve is actuated from a select condition. The lockout device includes a pair of generally oppositely facing engagement faces positionable between the abutment surfaces, and the device is adjustable so that the user may vary the distance between the engagement faces. In this respect, the lockout device may be disposed between the abutment surfaces and the engagement faces may be brought into secure, positive engagement with the abutment surfaces when the valve is in the select condition. This will prevent movement of the at least one abutment surface toward the other, and thereby prevent actuation of the valve.

REFERENCES:
patent: 1689236 (1928-10-01), Fraser, Jr.
patent: 4231389 (1980-11-01), Still et al.
patent: 4962785 (1990-10-01), Clifford
patent: 5353833 (1994-10-01), Martinez
patent: 5394715 (1995-03-01), Guerette
Technaflow, Inc. Brochure; TF 1000 High Performance Knife Gate (publication date unknown).
DeZurik Bulletin No. 33.00-1, entitled "DeZurik Cast Stainless Steel Knife Gate Valves", front and back covers sheets, pp. 2-9; (Jul., 1988).
DeZurik Drawing No. J-74837 of prior art lockout device.

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