Manually operable fluid dispenser

摘要

A manually operable fluid dispenser is described in which the pump cylinder (12) is a separate part plugged onto a dispenser body (2) and secured against retraction by stop and counter stop members (18, 10). The pump cylinder (12) is engaging a counter member (9) of the dispenser body (2) and this counter member (9) is surrounded at a distance by an additional casing jacket (5) entirely receiving the pump cylinder (12) in the initial position of the pump piston (20). Although a resiliently opening and closing discharge valve is conceivable a discharge closure device can be provided which, upon initially operating the discharge pump, irreversibly opens. An expel member (34) immersed into the hollow pump piston (20) is provided in the pump chamber (14) in such a way that it immerses at the beginning of the pump stroke. The discharge nozzle is provided with a nozzle cap receiving a separate nozzle mandrel and this nozzle mandrel is inserted into a discharge head, thereby engaging directly into a mounting opening of this discharge head.