Valves and valve actuation – With non-fluid retarder
Patent
1997-08-25
1999-10-19
Rivell, John
Valves and valve actuation
With non-fluid retarder
25112907, 25112918, F16K 3902, F16K 3106
Patent
active
059674873
ABSTRACT:
A valve assembly (14) has an internal main flow passage through a valve body (24) between a first port (25) and a second port (26), an electric actuator (30), and a valve (86) operated by an armature (58) of the actuator to selectively open and close the passage. A force-balancing mechanism (92) applies to the valve (86) a force that opposes force created by pressure differential between the first and second ports. The valve has cushion media (76, 80, 142) that cushions impact of lateral displacements of the armature and cushion media (76) for cushioning axial impact between the armature and stator. An overmold (32) encloses internal parts, and one of the ports contains sonic nozzle structure (28). the valve exhibits improved noise attenuation, durability, and performance.
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Balsdon David W.
Bruneel Gerry
Busato Murray F.
Cook John E.
Faulkner Robert
Rivell John
Siemens Canada Ltd.
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