Lockout device for subsurface valves

Details Lockout device for subsurface valves Lockout device for subsurface valves

1999-10-21

2000-10-17

Chambers, A. Michael

Fluid handling

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

Guards and shields

137356, 137377, 137368, 137363, F16L 3500

Patent

active

061316040

ABSTRACT:
A lockout device is designed for preventing unauthorized use of a valve located below ground level, the valve having a rotatable valve actuator. The device includes an elongated tubular housing of a length to have a lower end at the valve actuator and an upper end accessible generally at ground level. An encapsulating mechanism including a trap door are provided at the lower end of the tubular housing for securing the lower end to the valve and encapsulating the rotatable valve actuator, with the tubular housing being freely rotatable relative to the actuator.

REFERENCES:
patent: 4702275 (1987-10-01), Ballun et al.
patent: 4708160 (1987-11-01), Sharp et al.
patent: 5070895 (1991-12-01), Kelly
patent: 5234029 (1993-08-01), Thomas et al.
patent: 5327925 (1994-07-01), Ortel

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