Patent ID: 7316545

Claim:
A reducing agent pump for delivering liquid reducing agent to an exhaust-gas aftertreatment system of an internal combustion engine, comprising; a cylindrical pump body; a coil carrier surrounding said pump body and serving to receive an electromagnet; a piston disposed to execute an axial movement in said pump body when said electromagnet is being energized; a pump inlet part and a pump outlet part closing off said pump body at respective ends thereof, each of said inlet part and said outlet part having a central flow passage, at least one of said pump inlet part and said pump outlet part forming a two-piece part having a first element including said central flow passage and a closure element which is fixedly mounted; and a spring element disposed to bias said first element relative to said closure element and to allow a relative movement between said first element and said closure element when a pressure exceeds a spring force of said spring element.