Patent ID: 6901960

Claim:
A spool valve comprising: a valve housing formed of a reinforced polymer and having an inner surface, the inner surface having a first surface roughness and at least partially defining a generally cylindrical valve chamber; a first insert formed of a non-reinforced polymer and including an inner surface at least partially defining the valve chamber; a second insert formed of a non-reinforced polymer and including an inner surface at least partially defining the valve chamber, the inner surface of the first insert and the inner surface of the second insert having a second surface roughness, the second surface roughness being less than the first surface roughness, the housing being molded around the first insert and the second insert; and a spool slidably positioned within the valve chamber and including a first seal engaging the inner surface of the first insert, and a second seal engaging the inner surface of the second insert, the first and second seals delimiting the valve chamber into valve subchambers.