Unidirectional relief valve of flat kind

Abstract

A unidirectional relief valve of flat kind to be applied inside hermetic containers, characterized by the fact that the cap ( 2 ), which is of circular shape and has a central hole ( 3 ), has a symmetric structure, and on both faces are present identical ribs ( 5 ), allowing such identity and symmetry to insert the cap ( 2 ) inside the valve body ( 13 ) without the need to pre-orient it.

1 . A unidirectional relief valve of flat kind to be applied inside hermetic containers, comprising a cap ( 2 ), which is of circular shape and has a central hole ( 3 ), has a symmetric structure, and on both faces are present identical ribs ( 5 ), allowing such identity and symmetry to insert the cap ( 2 ) inside a valve body ( 13 ) without the need to pre-orient it. 
     
     
         2 . A unidirectional relief valve of flat kind to be applied inside hermetic containers, as in  claim 1 , further comprising a sealing seat ( 9 ) covered by a viscous layer ( 7 ) presents an eccentric configurations to optimize the oriented lifting of an elastic membrane ( 6 ) during a relief phase, even at very small overpressures of the residual gassy content inside the hermetic container. 
     
     
         3 . A unidirectional relief valve of the flat kind to be used in a hermetic container comprising:
 a circular symmetrical cap;   a central hole formed in said circular symmetrical cap; and   identical ribs formed on both faces of said circular symmetrical cap,   whereby said circular symmetrical cap can be inserted into a valve body without the need to pre-orient said circular symmetrical cap.   
     
     
         4 . A unidirectional relief valve of the flat kind to be used in a hermetic container as in  claim 3  further comprising:
 a viscous layer in an eccentric configuration; and   an elastic membrane placed between said circular symmetrical cap and said viscous layer,   whereby oriented lifting occurs of said elastic membrane during very small overpressures inside the hermetic container.