Patent ID: 7195182

Claim:
A dosing device for dosing a pressurized fluid, comprising: a housing with an actuator chamber for accommodating an actuator, a dosing orifice which is controllable by means of an actuator-induced axial displacement of a valve needle, a fluid chamber module disposed in the area of the orifice end of the housing and welded to said housing, a guide shaft which encloses one part of the valve needle and together with it forms a valve chamber, one end of the guide shaft together with one end of the valve needle forming the dosing orifice, while the other end of the valve needle extends through the fluid chamber module into the housing interior, and the other end of the guide shaft is retained on the fluid chamber module, a line hydraulically connecting the valve chamber to a high-pressure port for a dosing fluid, the fluid chamber module and the housing being fitted together along a pressure-loaded interface pressurized by the dosing fluid and formed virtually only by axial cylindrical wall surface portions.