Valves and valve actuation – Electrically actuated valve – Balanced valve
Reexamination Certificate
2005-12-06
2005-12-06
Douglas, Steven O. (Department: 3751)
Valves and valve actuation
Electrically actuated valve
Balanced valve
Reexamination Certificate
active
06971627
ABSTRACT:
A solenoid valve appropriately used for pressure control of various fluids, or the like is concerned, and a solenoid valve is provided, which achieves improvement in sliding property of a plunger and is excellent in control characteristics. More specifically, a plunger1is substantially cylindrical-shaped and slidably supported at its outer peripheral side by a sleeve, the plunger being provided with a large-diameter portion1a,which constitutes a sliding portion, the large-diameter portion1abeing alternately provided with a plurality of convex surface portions1dand a plurality of groove portions1eand having a cross sectional shape like petals.
REFERENCES:
patent: 4313571 (1982-02-01), Bellicardi et al.
patent: 4946132 (1990-08-01), Reiter
patent: 3904447 (1990-08-01), None
patent: 3933331 (1991-04-01), None
patent: 54-139321 (1979-09-01), None
patent: 57-141278 (1982-09-01), None
patent: 6-137453 (1994-05-01), None
patent: 10-196829 (1998-07-01), None
patent: 2000-46227 (2000-02-01), None
Hirata Ichiro
Kasagi Yoshinari
Uemura Norio
Douglas Steven O.
Jacobson & Holman PLLC
NOK Corporation
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