Locking control valve handle

Details Locking control valve handle Locking control valve handle

1995-11-13

1997-08-05

Wilton, George L.

Valves and valve actuation

With means for blocking or disabling actuator

Released by non-valving actuator motion

74171XY, 1376361, 1376362, 251 96, 251100, 251229, F16K 3504, F16K 1114

Patent

active

056534205

ABSTRACT:
A valve handle is provided with a hand rotated valve skirt containing a notch which in one position permits valve operation when the notch is aligned with the valve and in a second spring biased position the skirt interferes with the valve body to prevent accidental operation, the skirt further providing a dust cover for the valve operating mechanism.

REFERENCES:
patent: 3806962 (1974-04-01), Sievers
patent: 4566492 (1986-01-01), Bessard
patent: 4957137 (1990-09-01), Wang
patent: 5251660 (1993-10-01), Hori et al.
patent: 5433249 (1995-07-01), Tsubota et al.

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