Electric spool valve

Details Electric spool valve Electric spool valve

2011-08-30

2011-08-30

Hepperle, Stephen M (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C137S625250, C137S625670, C137S625340, C137S315040, C137S315270

Reexamination Certificate

active

08006718

ABSTRACT:
A sleeve has an input port, an output port, an insertion hole, and only one discharge port. A spool is axially slidable through the insertion hole to communicate among the input port, the output port, and the discharge port. An electric actuator is provided to one end of the sleeve and has a variable volume chamber, which communicates with the discharge port through an axial through hole and a spool breathing hole in the spool. The spool has a communication through hole to lead fluid from the output port to the discharge port through the axial through hole. A passage partition member is in the axial through hole to define an in-spool breathing passage communicating with the spool breathing hole.

REFERENCES:
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patent: 6681806 (2004-01-01), Isobe
patent: 6688334 (2004-02-01), Kawamura et al.
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patent: 6968816 (2005-11-01), Isobe et al.
patent: 7017885 (2006-03-01), Hirata et al.
patent: 7131410 (2006-11-01), Kondo et al.
patent: 2005/0178451 (2005-08-01), Inami
patent: 7-8677 (1995-02-01), None
patent: 9-60757 (1997-03-01), None
patent: 2003-97756 (2003-04-01), None
patent: 2003-214552 (2003-07-01), None
patent: 2005-233282 (2005-09-01), None
Japanese Office Action dated Aug. 18, 2009, issued in corresponding Japanese Application No. 2007-229399, with English Translation.

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