Spool valve

Details Spool valve Spool valve

2011-04-19

2011-04-19

Schneider, Craig M (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C251S050000

Reexamination Certificate

active

07926513

ABSTRACT:
A spool valve includes a valve housing, a spool and radial damper device. The valve housing has a shaft bore. The spool is slidably supported within the shaft bore in a longitudinal direction, and the spool has a first diameter portion and a second diameter portion. The radial damper device has a radial damper chamber and a radial chamber restrictor. The radial damper chamber is defined by a diameter difference between the first diameter portion and the second diameter portion. The radial chamber restrictor provides communication between the radial damper chamber and an adjacent chamber disposed adjacent to the radial damper chamber in the longitudinal direction.

REFERENCES:
patent: 3176721 (1965-04-01), Gordon
patent: 3266522 (1966-08-01), Gordon
patent: 5533551 (1996-07-01), Grancher
patent: 7066206 (2006-06-01), Ino et al.
patent: 7104283 (2006-09-01), Ino et al.
patent: 2002/0134443 (2002-09-01), Sudani et al.
patent: 2006/0081298 (2006-04-01), Segi et al.
patent: 55-2828 (1980-01-01), None
patent: 2002-130515 (2002-02-01), None
patent: 2003-56515 (2003-02-01), None
patent: 2005-325891 (2005-11-01), None
patent: 2006-46640 (2006-02-01), None
patent: 2006-112514 (2006-04-01), None
Japanese Office Action dated Nov. 9, 2010, issued in corresponding Japanese Application No. 2006- 256128 with English Translation.

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