Valves and valve actuation – Fluid actuated or retarded – Fluid and non-fluid actuators
Patent
1977-08-01
1980-06-10
Schwadron, Martin P.
Valves and valve actuation
Fluid actuated or retarded
Fluid and non-fluid actuators
92 75, 92 76, 251 31, 251 58, 251229, 251280, F16K 31143, F16K 3150
Patent
active
042069009
ABSTRACT:
An actuator for actuating valves and the like which comprises a pair of opposed cylinders, the axes of which are generally perpendicular to a valve stem. Pistons in the cylinders are connected to the valve stem by toggle links, the pistons being resiliently urged toward the center of the assembly which corresponds to a closed valve position. To open the valve, a fluid, such as air, is introduced between the pistons, so as to move them away from their rest (valve closed) positions. A handwheel is provided to manually open the valve by moving the pistons from their rest positions.
A solenoid controlled pneumatic valve may be used to control the supply of air to the actuator. Either a failure in air pressure or an electrical failure will result in the pistons being urged to the rest positions and also result in closing the connected valve, i.e., the failure mode.
REFERENCES:
patent: 535614 (1895-03-01), Corey, Jr.
patent: 872369 (1907-12-01), Rankin
patent: 1007275 (1911-10-01), Desmond
patent: 1532029 (1925-03-01), Bobbitt
patent: 1603005 (1926-10-01), Flam
patent: 1627658 (1927-05-01), Mauss
patent: 2042906 (1936-06-01), McElwaine
patent: 2344594 (1944-03-01), Bryant
patent: 2354987 (1944-08-01), Fawkes
patent: 2370604 (1945-02-01), DeCraene et al.
patent: 2885172 (1959-05-01), Natho
patent: 2890014 (1959-06-01), Luoma et al.
patent: 2908477 (1959-10-01), Buri
patent: 3452766 (1969-07-01), Fenster
patent: 3643688 (1972-02-01), Meinert
patent: 3801062 (1974-04-01), Arn et al.
patent: 3958493 (1976-05-01), Fujita et al.
patent: 3971542 (1976-07-01), Lee
patent: 4029289 (1977-06-01), Miffre
patent: 4050670 (1977-09-01), Borg et al.
patent: 4141534 (1979-02-01), Goga et al.
Masoneilan International, Inc. "The EF System of Control Valves"--1976--Bulletin No. 377E.
Borg-Warner Corporation
Burgess Aubrey L.
Schwadron Martin P.
Walton G. L.
LandOfFree
Valve operator 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 operator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve operator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-859101