Pump dispenser with flexible valves

Abstract

The invention relates to a pump chamber ( 12 ) for a dispenser ( 1 ), for example for a dispenser for liquid or paste-like substances, comprising a valve body ( 17, 18 ), the valve body ( 17, 18 ) consisting of a soft plastics material. In order to provide a pump chamber for a dispenser with a valve body, which pump chamber can be manufactured directly in an advantageous manner as regards the valve body, while having a manner of operation similar to that of conventional valve bodies, the invention proposes that the valve body ( 17, 18 ), which is formed in the shape of a cup, is accommodated in a receiving body ( 19, 20 ) that is formed from a hard plastics material, with a cup wall ( 31 ) of the valve body engaging in an elastically flexible manner against an inner surface ( 15 ) of a receiving wall of the receiving body which is formed as a receiving cup ( 19, 20 ), a fluid passage ( 21, 23 ) being furthermore provided in the receiving wall.

1 . Pump chamber ( 12 ) for a dispenser ( 1 ), for example for a dispenser for liquid or paste-like substances, comprising a valve body ( 17 ,  18 ), the valve body ( 17 ,  18 ) consisting of a soft plastics material, wherein the valve body ( 17 ,  18 ), which is formed in the shape of a cup, is accommodated in a receiving body ( 19 ,  20 ) that is formed from a hard plastics material, with a cup wall ( 31 ) of the valve body engaging in an elastically flexible manner against an inner surface ( 15 ) of a receiving wall of the receiving body which is formed as a receiving cup ( 19 ,  20 ), a fluid passage ( 21 ,  23 ) being furthermore provided in the receiving wall. 
     
     
         2 . Pump chamber according to  claim 1  or in particular according thereto, wherein the valve body ( 17 ,  18 ) is plug-connected to the receiving cup ( 19 ,  20 ). 
     
     
         3 . Pump chamber according to  claim 1  or in particular according thereto, wherein the valve body ( 17 ,  18 ) is connected to the receiving cup ( 19 ,  20 ) in the two-component injection-molding process. 
     
     
         4 . Pump chamber according to  claim 1  or in particular according thereto, wherein the valve body ( 17 ,  18 ) has a portion that passes through the receiving cup ( 19 ,  20 ). 
     
     
         5 . Pump chamber according to  claim 1  or in particular according thereto, wherein the through-passing portion has its base in the cup base ( 24 ) of the valve cup. 
     
     
         6 . Pump chamber according to  claim 1  or in particular according thereto, wherein the through-passing portion passes through the base of the receiving cup. 
     
     
         7 . Pump chamber according to  claim 1  or in particular according thereto, wherein the pump chamber has two valves with features of  claim 1 .