Valve mechanism for tube-type fluid container

Abstract

A valve mechanism adapted for a fluid-discharging port of a tube-type fluid container includes: a valve seat portion having a valve seat surface with an opening for passing a fluid therethrough; a valve portion comprising a valve body having a shape corresponding to the valve seat surface with the opening, and a shaft connected to the valve body and extending downward from the valve body, and a valve support portion for elastically urging the valve body downward to close the opening. An annular convex portion is further formed between the valve seat surface and the valve body on the valve seat surface or the valve body for closing the opening with the valve body at the annular convex portion.

1 . A valve mechanism adapted for a fluid-discharging port of a tube-type fluid container, comprising: 
 a valve seat portion having a valve seat surface with an opening for passing a fluid therethrough;    a valve portion comprising a valve body having a shape corresponding to the valve seat surface with the opening, and a shaft connected to said valve body and extending downward from the valve body, wherein an annular convex portion is formed between the valve seat surface and the valve body on the valve seat surface or the valve body for closing the opening with the valve body at the annular convex portion; and    a valve support portion for elastically urging the valve body downward to close the opening.    
   
   
       2 . The valve mechanism as claimed in  claim 1 , wherein said valve support comprises: (i) a bottom plate to which a tip of the shaft is connected; (ii) an annular support fixedly connected to the valve seat portion; and (iii) multiple connectors connecting the bottom plate and the annular support, said connectors elastically urging the bottom plate downward to close the opening with the valve body and being bendable as the bottom plate moves upward and pushes the valve portion to open the opening.  
   
   
       3 . The valve mechanism as claimed in  claim 1 , wherein said multiple connectors are composed of three or more connectors.  
   
   
       4 . The valve mechanism as claimed in  claim 1 , wherein said multiple connectors have flexions.  
   
   
       5 . The valve mechanism as claimed in  claim 1 , wherein the convex portion facing toward said valve body is formed on the valve seat surface, which convex portion contacts the valve body when the valve body closes the opening.  
   
   
       6 . The valve mechanism as claimed in  claim 1 , wherein the convex portion facing toward said valve seat surface is formed on the valve body, which convex portion contacts the valve seat surface when the valve body closes the opening.  
   
   
       7 . A tube-type fluid container comprising a tubular container main unit, at one end of which a fluid-discharging port is formed, and the valve mechanism as claimed in  claim 1 .  
   
   
       8 . The tube-type fluid container as claimed in  claim 7 , wherein said multiple connectors are composed of three or more connectors.  
   
   
       9 . The tube-type fluid container as claimed in  claim 7 , wherein said multiple connectors have flexions.  
   
   
       10 . The tube-type fluid container as claimed in  claim 7 , wherein said container main unit comprises (A) an internal container storing a fluid, and (B) an external container which is composed of a material having an elasticity recovering force and encompasses said internal container in such a way that an interior space shut off from the outside is formed between said external container and said internal container, and in which a hole communicating with said interior space and the outside is formed.  
   
   
       11 . The tube-type fluid container as claimed in  claim 10 , wherein said hole formed in said external container has a size which can let a small amount of air through.  
   
   
       12 . The tube-type fluid container as claimed in  claim 10 , wherein said hole formed in said external container is formed in a portion to which a pressure is applied when the fluid is discharged.  
   
   
       13 . The tube-type fluid container as claimed in  claim 10 , wherein opening portions of said internal container and of said external container are connected to each other at said fluid-discharging port, and said internal container and said external container are welded at their bottoms.  
   
   
       14 . A valve comprising: 
 a seat having an opening through which a fluid may flow;    a seal comprising a body having a shape corresponding to said opening; and    a support for coupling said seal to said seat, the support comprising multiple elastically deformable connectors, said connectors producing a biasing force that causes the seal to substantially close the opening;    wherein the connectors are adapted to elastically deform in response to a fluid pressure on said seal that overcomes the biasing force so as to permit the flow of fluid through the opening,    wherein the opening comprises a first ledge, the seal comprises a second ledge, the second ledge sits on the first ledge when the opening is closed by the biasing force,    wherein at least one of the first ledge and the second ledge comprises at least one tab.