Container for receiving and discharging a flowable medium

Abstract

A container for receiving and discharging a flowable medium comprises a resilient wall enclosing a volume receiving the flowable medium, an opening through which the flowable medium may be discharged when the volume of the container is reduced by applying pressure to the resilient wall, and an automatically resetting pneumatic device for indirectly applying the pressure to the resilient wall. This device may be an actuating hollow body comprised at least partly of a resilient material, the hollow body bordering on the resilient wall, and the resilient wall and hollow body together closing the volume of the container. Alternatively, the device may comprise an outer container for a gaseous medium, the outer container hermetically enclosing the container receiving the flowable medium, except for the opening, and the outer container having a resilient wall for applying pressure on the gaseous medium, which pressure is transmitted to the resilient wall of the container receiving the flowable medium, the proportion of the volume of the outer container to the container hermetically enclosed thereby being between 1.2:1 to 20:1.

What is claimed is:  
     
         1 . A container for receiving and discharging a flowable medium, which comprises 
 (a) a resilient wall,    (b) an opening through which the flowable medium may be discharged when the volume of the container is reduced by applying pressure to the resilient wall, and    (b) an automatically resetting pneumatic means for applying the pressure to the resilient wall, the automatically resetting pneumatic means comprising 
 (1) an actuating hollow body comprised at least partly of a resilient material, the hollow body bordering on the resilient wall, and the resilient wall and hollow body together closing the volume of the container.  
   
     
     
         2 . The container of  claim 1 , wherein the container is substantially cylindrical, the resilient wall forms a bottom of the cylindrical container and is arranged opposite the opening.  
     
     
         3 . The container of  claim 1 , wherein the cross section of the container is substantially oval.  
     
     
         4 . The container of  claim 1 , wherein the cross section of the container is substantially round.  
     
     
         5 . The container of  claim 1 , being of tubular shape.  
     
     
         6 . The container of  claim 1 , wherein the actuating hollow body is substantially hemispherical.  
     
     
         7 . A container for receiving and discharging a flowable medium, which comprises 
 (a) a resilient wall enclosing a volume receiving the flowable medium,    (b) an opening through which the flowable medium may be discharged when the volume of the container is reduced by applying pressure to the resilient wall, and    (b) an automatically resetting pneumatic means for indirectly applying the pressure to the resilient wall, the automatically resetting pneumatic means comprising 
 (1) an outer container for a gaseous medium, the outer container hermetically enclosing the container receiving the flowable medium, except for the opening, and the outer container having a resilient wall for applying pressure on the gaseous medium, which pressure is transmitted to the resilient wall of the container receiving the flowable medium, the proportion of the volume of the outer container to the container hermetically enclosed thereby being between 1.2:1 to 20:1.  
   
     
     
         8 . The container of  claim 7 , wherein the proportion is 1.5:1 to 6.5:1.  
     
     
         9 . The container of  claim 7 , wherein a major part of the outer container is comprised of a resilient wall material.  
     
     
         10 . The container of  claim 7 , further comprising a gas-tight seal at the opening between the container receiving the flowable medium and the outer container.  
     
     
         11 . The container of  claim 7 , wherein a major part of the container receiving the flowable medium is comprised of a resilient wall material.  
     
     
         12 . The container of  claim 7 , wherein the outer container is substantially cylindrical.  
     
     
         13 . The container of  claim 12 , wherein the cross section of the outer container is substantially oval.  
     
     
         14 . The container of  claim 12 , wherein the cross section of the outer container is substantially round.