Solenoid valve having a hollow cap mounted on a leading end...

Details Solenoid valve having a hollow cap mounted on a leading end... Solenoid valve having a hollow cap mounted on a leading end...

2008-05-28

2011-10-18

Bastianelli, John (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C137S625270, C251S129190, C251S129200, C251S337000

Reexamination Certificate

active

08037901

ABSTRACT:
A solenoid valve that is constructed as follows: a cap is mounted on a movable iron core such that forward movement thereof is restricted; a pressing member is displaceably arranged between abutting seat surfaces of the cap and the movable iron core; biasing forces F1, F2, and F3of an iron core return spring for biasing the movable iron core toward a initial position, a cushioning spring provided between the movable iron core and the pressing member, and a valve return spring for biasing a valve member in a direction to open a valve are set so as to be F1>F2>F3; and gaps x and y are provided between the pressing member and the movable iron core and between the pressing member and the cap, respectively, when the movable iron core is at the initial position.

REFERENCES:
patent: 6390445 (2002-05-01), Fukano
patent: 6542059 (2003-04-01), Sato et al.
patent: 6655411 (2003-12-01), Sato et al.
patent: 6745790 (2004-06-01), Sato et al.
patent: 2006/0108551 (2006-05-01), Yoshimura et al.
patent: 2002-188749 (2002-07-01), None
patent: 2003-56740 (2003-02-01), None
patent: 2004-156709 (2004-06-01), None
patent: 500888 (2002-09-01), None
patent: 531617 (2003-05-01), None
U.S. Appl. No. 12/129,899, filed May 30, 2008, Matsumoto.
Office Action issued Apr. 20, 2011, in Taiwan Patent Application No. 097121548.

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