Patent ID: 7195227

Claim:
A valve arrangement comprised of a base body for mounting at an opening to be closed of a container or tube, the base body having a through passage with axial ends and close to one axial end of the through passage a first valve surface, a valve element held by the base body and having axial ends and forming a second valve surface proximal to one of its axial ends which can sealingly engage with the first valve surface to close the through passage, the valve element being movable relative to the base body between a closed position with the valve surfaces sealingly engaging each other and an open position, a stem element which engages in the through passage from the side of its other axial end and has first coupling means for releasable engagement with second coupling means on the valve element in order to move the valve element from the closed position into the open position, the base body and the valve element being separate molded parts, and a plurality of abutment arms projecting inward from an inner peripheral wall of the through passage, defining with a shaft region of the valve element a clearance, and defining a radial gap between opposite arms which is greater than a radial dimension of the shaft region and smaller than a radial dimension of a shoulder of the valve element so that the shoulder can axially engage the abutment arms upon movement of the valve element into the open position and the abutment arms limit the opening movement of the valve element, the abutment arms being elastically yieldable to exert a force opposing the opening movement of the valve element.