Strainer and control valve

Details Strainer and control valve Strainer and control valve

2011-03-15

2011-03-15

Rivell, John (Department: 3753)

Fluid handling

With means for separating solid material from the fluid

Planar strainer normal to flow path

C210S418000, C210S429000

Reexamination Certificate

active

07905248

ABSTRACT:
The present invention prevents foreign matter from infiltrating into a control valve and enables reduction in the cost of the valve. A strainer is mounted on an attachment portion of a valve sleeve, and a valve spool is disposed in the sleeve so as to be free to slidably advance and retreat. The strainer includes engagement portions m1contacting first contact sites ε1and ε2formed on the attachment portion and a contact portion contacting second contact sites ε3and ε4formed on the attachment portion. Since the strainer includes the engagement portions m1in contact with the first contact sites ε1and ε2and the contact portion in contact with the second contact sites ε3and ε4, the sleeve has sufficient sealing contact with the strainer73at the first and second contact sites ε1to ε4.

REFERENCES:
patent: 1173157 (1916-02-01), Allen
patent: 3006371 (1961-10-01), Giles
patent: 3097660 (1963-07-01), Priesmeyer
patent: 5062454 (1991-11-01), Ichihashi et al.
patent: 7000633 (2006-02-01), Okada et al.
patent: 7040874 (2006-05-01), Martin et al.
patent: 2003/0226593 (2003-12-01), Okada et al.
patent: 05-306783 (1993-11-01), None
patent: 2000266235 (2000-09-01), None
patent: 2001-041349 (2001-02-01), None
patent: 3324140 (2002-09-01), None
patent: 2004-150444 (2004-05-01), None

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