Safety pushbutton for operating fluid substance dispensing pumps

Abstract

An operating pushbutton for dispensing pumps for fluid substances contained in containers on which the pumps are mounted. The pushbutton has an end portion which can translate on a portion thereof applicable to the pump stem, such that when a pressure is exerted on said end portion it undergoes a free translation before causing the other pushbutton portion to move, hence preventing accidental dispensing of the fluid substance.

1 . A safety pushbutton applicable to the stem of a pump or valve for dispensing fluid substances comprising two separate portions, namely a free end portion and, respectively, a main portion in which there are provided a seat for the free end of said stem and a nozzle for the exit of fluid substance originating from said seat, to which the nozzle is connected by a conduit provided in the main portion of the pushbutton, said end portion being movable relative to the main portion of the pushbutton, on which it is retained by retention elements which hold together these two pushbutton portions, between which there is interposed an elastically deformable element which urges the free end portion away from the main portion of the pushbutton towards and against said retention elements.  
   
   
       2 . A safety pushbutton as claimed in  claim 1 , wherein said elastically deformable element consists of at least one deformable appendix projecting from one of the two pushbutton portions and resting on the other pushbutton portion.  
   
   
       3 . A safety pushbutton as claimed in  claim 1 , wherein said retention elements consist of teeth or ribs projecting from one of said pushbutton portions and interacting with ribs or recesses provided on the other pushbutton portion.  
   
   
       4 . A safety pushbutton as claimed in  claim 2 , wherein said retention elements consist of teeth or ribs projecting from one of said pushbutton portions and interacting with ribs or recesses provided on the other pushbutton portion.