Pump pushbutton, with an operating portion movable relative to a portion having a dispensing nozzle or insert and elements for its retention on the pump

Abstract

A pushbutton for a pump or valve for dispensing fluid substances contained in a container on which the pump is mounted. The main portion of the pushbutton has a substance dispensing nozzle and elements for securely retaining said main portion on the pump or on a body rigid therewith. The pushbutton also has an upper or movable portion with a seat for sealedly housing the free end of the pump stem. The two pushbutton portions can translate one relative to the other and are connected together by tubular appendices which are inserted into and sealedly translatable one within the cavity of the other and are connected to said stem seat and to said nozzle respectively.

1 . An operating pushbutton for a pump or valve for dispensing fluid substances contained in containers comprising: 
 two separate pushbutton portions connected together and translatable axially one relative to the other, namely a movable free end portion operable by a finger of one hand and, respectively, a main pushbutton portion provided with elements for its retention on the pump or on a rigid body fixed to the pump;    a seat provided in said pushbutton end portion to sealedly house the free end of the stem of said pump;    a nozzle for discharging the fluid substance to the outside of the pushbutton, said nozzle being provided within the pushbutton main portion, in which there is also provided an aperture into which at least the pump stem can extend;    two tubular appendices projecting one towards the other, one from said end portion and the other from said main portion of the pushbutton, the axes of said appendices being parallel to the axis of said seat for the stem end;    conduits provided in the two pushbutton portions, to connect said seat for the stem to the cavity of that tubular appendix projecting from the pushbutton end portion and, respectively, to connect said nozzle to the cavity of that tubular appendix of the pushbutton main portion;    one of said two tubular appendices being inserted into and sealedly translatable within the cavity of the other tubular appendix to hence directly connect said nozzle to said seat for the pump stem.    
     
     
         2 . A pushbutton as claimed in  claim 1 , wherein said retention elements consist of a plurality of appendices or a continuous tubular wall projecting from said pushbutton main portion on the opposite side to that from which the tubular appendix forming part of the pushbutton main portion projects, said appendices or tubular wall having dimensions such as to fit over the ring cap by which the pump is fixed on to the mouth of a container, and being provided with inwardly projecting teeth or ribs to secure the pushbutton to the ring cap.