Patent ID: 7661654

Claim:
A valve unit adapted to being connected with a fixed member and an external member, the valve unit comprising: a valve member for communicating and blocking a fluid passage; an actuator for actuating the valve member; a housing defining a chamber therein for absorbing variation in pressure, the housing including a mount member for securing the housing to the external member, the housing further including a protruding portion provided at a location other than a location of the mount member, the protruding portion outwardly extending and adapted to being inserted into an insertion hole of the fixed member; a bias member provided to a substantially annular groove in an outer periphery of the protruding portion; and an eccentrically positioning unit for eccentrically positioning a bottom surface of the substantially annular groove with respect to the insertion hole to bias the bias member to an inner periphery defining the insertion hole, in a condition where the protruding portion is inserted in the insertion hole.