Valve actuator

Details Valve actuator Valve actuator

1994-07-11

1996-11-26

Lee, Kevin

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137 80, 137457, 251 25, 92 65, F16K 1720, F16K 31124

Patent

active

055775322

ABSTRACT:
An actuator has been developed for actuating a valve for controlling fluid flow in a conduit, the actuator having, in one aspect a housing with a main interior housing space, a rod with a mid-portion, a top end and a bottom end, the mid-portion movably disposed in the housing, the bottom end movably extending from the housing and interconnected with the valve, a first piston member secured to the rod and movable in the housing as the rod moves, a second piston member movably disposed in the housing above the first piston member, the second piston member movable to contact the first piston member, first power apparatus for moving the rod to open or close the valve, and second power apparatus for moving the second piston member to contact the first piston member moving the first piston member and the rod to close the valve. In one aspect the rod has a stop shoulder above the first piston member, and the second piston member is movable to contact the stop shoulder to move the rod. Valve systems have been developed which include a valve and such an actuator. Such actuators and systems may employ various structures, housings, and seals and various noted power supplies so that during operation no fluid from within the valve, the actuator, the system, or a flow conduit whose fluid flow is controlled by the valve escapes to the environment.

REFERENCES:
patent: 1682621 (1927-05-01), Taylor
patent: 2072314 (1937-03-01), Rhodes
patent: 2207491 (1940-07-01), Parker
patent: 2397299 (1946-03-01), Strid
patent: 2413301 (1946-12-01), Ellis
patent: 2741478 (1956-04-01), Mercier
patent: 2791093 (1957-05-01), Shafer
patent: 2836192 (1958-05-01), Shafer
patent: 2849987 (1958-09-01), Shafer
patent: 3089430 (1963-05-01), Shafer et al.
patent: 3157030 (1964-11-01), Anderson
patent: 3196615 (1965-07-01), Kautz
patent: 3285287 (1966-11-01), Curran
patent: 3405523 (1968-10-01), Adams
patent: 3468126 (1969-09-01), Mercier
patent: 3505814 (1970-04-01), Beard et al.
patent: 3730214 (1973-05-01), Brumm
patent: 3765181 (1973-10-01), Lang et al.
patent: 3877347 (1975-04-01), Sheesley et al.
patent: 3901274 (1975-08-01), Taber et al.
patent: 3911678 (1975-10-01), Shafer et al.
patent: 3975907 (1976-08-01), Polacek
patent: 4102128 (1978-07-01), Shafer et al.
patent: 4141533 (1979-02-01), Goodman
patent: 4274328 (1981-06-01), Pedersen
patent: 4380325 (1983-04-01), Palmer
patent: 4460152 (1984-07-01), Dipasquale et al.
patent: 4476678 (1984-09-01), Hall
patent: 4585205 (1986-04-01), Coppola et al.
patent: 4585207 (1986-04-01), Shelton
patent: 4621496 (1986-11-01), Lamb
patent: 4679764 (1987-07-01), Smith et al.
patent: 4687179 (1987-08-01), Smith
patent: 4872482 (1989-10-01), Jarrett
patent: 4934652 (1990-06-01), Golden
patent: 5244004 (1993-09-01), Robertson
patent: 5309934 (1994-05-01), Jaeger
patent: 5331882 (1994-07-01), Miller
"GM Series Gas Motor Valve Actuators, " Pneugear, Inc. 1992.

Affiliated with

Also associated with

Rating

Valve actuator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Valve actuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve actuator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1966053