Patent ID: 7086832

Claim:
A high pressure rotary pump comprising a pot housing including a pressure cap which has a flange part with a flange with which the pressure cap is fastened to an end face and annular first sealing surface of the housing by being screwed into place so that the flange is elastically deformed, the flange defining a base zone and a second sealing surface, the first sealing surface including at least one annular groove and a seal placed into the at least one annular groove, the first sealing surface being in contact with the second sealing surface in the region of a base zone of the flange, the first and second sealing surfaces lying on two at least approximately radially extending conical or annular surfaces prior to being screwed up and enclosing a small angle χ which opens outwardly with respect to a central axis such that, after the screwing up of the flange, the first and second sealing surfaces are pressed onto one another due to its elastic deformations so that the angle between the sealing surfaces is equal to zero.