Sealing valve for vacuum container

Abstract

A kind of sealing valve for vacuum container comprising: the cap body, the connecting body and the locking portion; the cap body is to be jointed to the locking portion through the connecting body; the locking portion is formed with the concave portion; the locking portion is to lock onto the hole on the upper cap via the concave portion, thus when the vacuum pump proceeds to extract air out of the vacuum container, the cap body is to be deflected and deformed by air flow, so that the air hole of the upper cap is to be opened, and then the cap body is to automatically close the air hole of the upper cap after the pressure difference between the interior and exterior of the vacuum container has reached the predetermined value.

What is claimed is:  
     
         1 . A sealing valve for vacuum container comprising: a cap body, a connecting body and a locking portion, wherein said cap body, of umbrella shape, is to be jointed with said locking portion through said connecting portion; said cap body, connecting body and locking portion are integrally formed.  
     
     
         2 . A sealing valve for vacuum container as in  claim 1 , wherein said locking portion is formed with a concave portion.  
     
     
         3 . A sealing valve for vacuum container as in  claim 1 , wherein said sealing valve is made of rubber material.  
     
     
         4 . A sealing valve for vacuum container as in  claim 1 , wherein the vertical length from the top of said cap body to the edge thereof is larger than that from said top of said cap body to the bottom surface of said locking portion.  
     
     
         5 . A sealing valve for vacuum container as in  claim 1 , wherein the inner surface of said cap body is of arc shape.