Atomised liquid dispenser for manually operated pumps - includes chamber with piston having appendix projecting from it, this appendix urged by the spring towards dispensing nozzle

摘要

The dispenser includes a seat (2) for fixing onto the free end of a pump stem (3) and communicating with an elongate chamber (4) closed at one of its ends by an insert (6) traversed by a discharge nozzle (7). There is a piston (13) in the chamber, with lip, near the piston, sealing against the surface of the chamber. There is also an appendix (16), on the other end of the piston, which is urged towards the nozzle (7) by a spring (15) acting on the piston. Within the chamber there extends a stop (17), against which, when under rest conditions, the spring urges the piston while the end of the appendix (16) remains spaced from the opposing surface of the insert. There is provided within the insert, in correspondence with the nozzle (7) a partially cylindrical seat (18) into which a corresponding cylindrical portion of the appendix can be inserted. The length of the piston (13) and of its appendix is such that the removal of the piston from its rest position causes firstly the removal of the piston from the respective stop (17) followed by the emergence of the cylindrical portion of the appendix from the respective cylindrical seat (18) provided in the insert (6).