Patent ID: 7363917

Claim:
A valve for use in a filter unit for a fuel supply system of an internal combustion engine, the filter having a pipe portion capable of having a flow passing therethrough, the valve comprising: (i) a pipe body capable of being inserted into the pipe portion and which comprises a transverse wall forming a valve seat and a through-flow cross-section and dividing an inner chamber of the pipe body into a pressure side and a relief side; (ii) a damping cylinder; (iii) a blocking body which, under a resilient force of pretensioning, lies against a relief side of the valve seat and has an end portion that faces away from the valve seat and is received and guided in the damping cylinder, wherein a liquid-filled chamber bounded by the damping cylinder and the end portion is in fluid communication with an inner chamber of the pipe body via a throttle which issues into the portion of the inner chamber which is on the relief side of the transverse wall; (iv) a sleeve connected to the damping cylinder and which can be screwed into the pipe body from a relief side thereof, wherein the throttle is formed by an annular gap between the outside of the end portion and an inner side of the damping cylinder that faces the end portion; and (v) a sealing body which is formed of an elastomeric material and cooperates with the valve seat.