Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1997-12-30
2000-07-25
Shaver, Kevin
Valves and valve actuation
Electrically actuated valve
Including solenoid
13762565, F16K 3102
Patent
active
060927844
ABSTRACT:
A coil assembly for miniature solenoid valves, such as size SAE-6 valves, includes a flux tube which passes through the hollow core of the coil assembly. The flux tube is formed against a shoulder of a coupling member by using the "Tammel" orbital head forming technique in which a forming tube orbits around the end of the flux tube to form a flange which bears against the shoulder. A flux washer is disposed adjacent the coil and is held tightly thereagainst by the flux tube to help linearize magnetic force exerted upon energizing the coil. In order to facilitate stroking and destroking the solenoid valve, the tank ports close slightly before the pressure ports are opened when stroking and slightly after when destroking. The coil is designed to saturate the magnetic circuit early to diminish the effect of coil heating and resultant force loss at a given stroke displacement.
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Dana Corporation
Shaver Kevin
Welsh John P.
LandOfFree
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