Spool valve
AssigneeSumitomo Precision Products Co., Ltd.
InventorKazuhiro MASUTANI
Life of this patent
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Abstract
A spool valve includes: a spool; a housing that houses the spool so as to allow the spool to reciprocate along an axis; and an electric device that switches the hydraulic fluid path by moving the spool along the axis. The spool includes a first end face that is perpendicular to the axis. The housing includes a stopping surface that positions the spool in a neutral position by abutting against the first end face of the spool. Either one or both of the first end face and the stopping surface have one or more projections or recesses.
Claims7
A spool valve that switches a hydraulic fluid path, the spool valve comprising:
- a spool;
- a housing having a sleeve bore into which the spool is inserted, and housing the spool so as to allow the spool to reciprocate along an axis;
- and
- an electric device connected to the spool and switching the hydraulic fluid path by moving the spool along the axis, wherein
- the spool includes a first end face on a first side in a direction along the axis, the first end face being perpendicular to the axis,
- the housing includes a stopping surface perpendicular to the axis, the stopping surface abutting against the first end face of the spool, and
- either one or both of the first end face and the stopping surface have one or more projections or recesses.
Dependencies are inferred from the claim text.