Tank closure

Abstract

A tank closure comprises a tank cap and an electrically conductive tank neck. The tank cap has, for handling thereof, a grip portion made of electrically conductive material that is in electrical contact with at least one resilient contact projection that is also electrically conductive and, with the tank cap in the screwed-on state, rests against the tank neck. The contact projection or projections is or are shaped onto or molded into the grip portion.

1 . A tank closure ( 1 ) comprising a tank cap ( 3 ) and an electrically conductive tank neck ( 2 ), the tank cap ( 3 ) having, for handling thereof, a grip portion ( 7 ) made of electrically conductive material that is in electrical contact with at least one resilient contact projection ( 12 ,  13 ) that is also electrically conductive and, with the tank cap ( 3 ) in the screwed-on state, rests against the tank neck ( 2 ), 
 wherein the contact projection or projections ( 12 ,  13 ) is or are shaped onto or molded into the grip portion ( 7 ).    
   
   
       2 . The tank closure as defined in  claim 1 , wherein the contact projection or projections ( 12 ,  13 ) is or are made of electrically conductive plastic.  
   
   
       3 . The tank closure as defined in  claim 1 , wherein the grip portion ( 7 ) is made of electrically conductive plastic.  
   
   
       4 . The tank closure as defined in  claim 2 , wherein the contact projection or projections ( 12 ,  13 ) are molded onto the grip portion ( 7 ).  
   
   
       5 . The tank closure as defined in  claim 1 , wherein the contact projection or projections ( 12 ,  13 ) is or are embodied in the manner of a leaf spring, and protrude radially obliquely inward.  
   
   
       6 . The tank closure as defined in  claim 5 , wherein the contact projection or projections ( 12 ,  13 ), viewed in a circumferential direction, protrude radially obliquely inward beginning on the inner side of the grip portion ( 7 ).  
   
   
       7 . The tank closure as defined in  claim 6 , wherein the underside ( 17 ,  18 ) of the contact projection or projections ( 12 ,  13 ) is pulled up toward the free end ( 19 ) and chamfered.  
   
   
       8 . The tank closure as defined in  claim 5 , wherein the inner side of the grip portion ( 7 ) comprises, in the region of the contact projection or projections ( 12 ,  13 ), recesses ( 15 ,  16 ) such that the respective contact projection ( 12 ,  13 ) fits into the receiss ( 15 ,  16 ) upon radial outward motion.  
   
   
       9 . The tank closure as defined in  claim 8 , wherein the contact projection or projections ( 12 ,  13 ) is or are respectively shaped on a rim of the recess ( 15 ,  16 ).  
   
   
       10 . The tank closure as defined in  claim 1 , wherein two contact projections ( 12 ,  13 ), located diametrically opposite one another, are provided.