Lockout device for valve actuators

Details Lockout device for valve actuators Lockout device for valve actuators

1998-10-23

2000-08-22

Lopez, F. Daniel

Expansible chamber devices

With releasable stop or latch means to prevent movement of...

Engages member coaxial with and rotatable relative to...

92 23, F15B 1526

Patent

active

061054844

ABSTRACT:
A lockout device is used to prevent linear movement of a piston rod in a pneumatic cylinder actuator used for controlling the position of a valve flow control member or other applications. The lockout device includes a locking plate having a piston rod hole formed therein whereby the locking plate is threaded onto an end of the piston rod. Fastener holes are provided in the locking plate whereby the locking plate is fastened to the actuator housing to prevent movement thereof. A lockout cover assembly may be attached to the locking plate to prevent access by unauthorized personnel to fasteners placed in the fastener holes. A groove may be provided along the circumference of the locking plate whereby the lockout cover assembly is attached to the locking plate.

REFERENCES:
patent: 3267818 (1966-08-01), Chambers
patent: 3905279 (1975-09-01), Yadon
patent: 4052995 (1977-10-01), Ellison
patent: 4247082 (1981-01-01), Sjolund

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