Diaphragm Valve Soda Dispenser

Abstract

A diaphragm valve soda dispenser comprises a main body with a cavity, an inlet and an outlet; an elastic valve seal having a cup shape located in the cavity of the main body; a main cap with an opening groove and a center hole; a thumb screw with a protuberant ring and a screw hole, the protuberant ring is assembled rotatable in the opening groove; a piston rod with screw, which is assembled in the screw hole of the thumb screw and inserted into the elastic valve seal through the center hole of the main cap; turning the thumb screw moves the piston rod into the valve seal to push a bottom of the valve seal closing the inlet of the main body, vice versa moves the piston rod out the elastic valve seal drawing back to open the inlet of the main body.

What is claimed is: 
     
         1 . A diaphragm valve soda dispenser comprising:
 a main body with a cavity, an inlet and an outlet;   an elastic valve seal having a cup shape located in the cavity of the main body;   a main cap with an opening groove and a center hole, which presses a flange of the elastic valve seal on an edge of the cavity of the main body for preventing leaking of carbon dioxide;   a thumb screw with a protuberant ring and a screw hole, the protuberant ring is assembled rotatable in the opening groove;   a piston rod with screw, which is assembled in the screw hole of the thumb screw and inserted into the elastic valve seal through the center hole of the main cap;   turning the thumb screw moves the piston rod into the valve seal to push a bottom of the valve seal closing the inlet of the main body, vice versa moves the piston rod out the valve seal drawing back to open the inlet of the main body.   
     
     
         2 . The diaphragm valve soda dispenser of  claim 1 , wherein the piston rod has a flange at a rod bottom, the elastic valve seal has a ring groove at a valve seal bottom, the flange of piston is inserted in the ring groove of main cap. 
     
     
         3 . The diaphragm valve soda dispenser of  claim 1 , wherein the center hole of main cap has two parallel opposite edges, the piston rod has two parallel opposite edges, thereby the piston rod is moved into or out the elastic valve seal without rotating. 
     
     
         4 . The diaphragm valve soda dispenser of  claim 1 , wherein the elastic valve seal is made of silicone rubber. 
     
     
         5 . The diaphragm valve soda dispenser of  claim 1 , wherein the inlet of main body is connected with a large bottle of carbonated beverage and the outlet of main body is connected with a small bottle of carbonated beverage, or vice versa. 
     
     
         6 . The diaphragm valve soda dispenser of  claim 1 , wherein the inlet and outlet of main body have seal rings respectively.