Edwards & Angell, LLP
Spool valve and manufacturing method therefor
 The invention relates to a spool valve having an inner hybrid construction and a method of manufacturing the same, and the spool valve comprising sliding surface portions and grooves, the sliding surface portions and the grooves being arranged alternately adjacent to each other in a longitudinal direction of the spool valve, the sliding surface portions being formed by sliding members, which are provided on a base portion of a synthetic resin to be fitted thereon. 
Aoyama Seisakusho Co., Ltd.
F Y F Y
F16K Y10T F16K Y10T
inventional additional inventional additional
Toshiya Hideki
Mori Kakamu