Spool valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 18, 2003
Grant Date -
Dec 20, 2001
app pub date -
Jun 7, 2001
filing date -
Jun 16, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spool valve is provided which has a plurality of small-diameter portions formed at predetermined spacings on a peripheral surface of a shaft, and pairs of annular ridges on peripheral surfaces of the small-diameter portions to have a larger diameter than an inner diameter of collars. The collars are closely fitted between the annular ridges to make valve bodies, and the collars include an inner wall, an outer wall and at least one connection therebetween, and an annular gap is provided between the inner wall and the outer wall.
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Cited Art Landscape
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