Patent ID: 7360558

Claim:
A control valve, comprising: a valve housing having an inside formed with a receiving chamber; a valve seat mounted in the receiving chamber of the valve housing; wherein: the valve seat is forced into the receiving chamber of the valve housing by a rib and groove engagement so that the valve seat is secured in the receiving chamber of the valve housing; the receiving chamber of the valve housing has a periphery formed with a plurality of longitudinally extended locking grooves, and the valve seat has a periphery formed with a plurality of longitudinally extended locking ribs forced into and locked in the locking grooves of the valve housing respectively; the valve seat is a substantially cylindrical body formed by a plastic injection molding process; each of the locking ribs of the valve seat has a shape and a size matching that of a respective locking groove of the valve housing; each of the locking ribs of the valve seat is forced into the respective locking groove of the valve housing without producing a gap between each of the locking ribs of the valve seat and the respective locking groove of the valve housing to prevent vibration from producing between the valve seat and the valve housing; the valve housing has an open first end formed with an inner threaded portion having a stepped shape and a closed second end formed with a threaded locking hole and an insertion hole each connected to the receiving chamber; the valve seat has a central portion formed with a valve chamber having a first end formed with a stepped hole and a second end connected to the locking hole of the valve housing and has a side formed with a water outlet port connected to the valve chamber and the insertion hole of the valve housing.