Sealing System For Fill Pipe Head And Associated Pipe

Abstract

Sealing system for fuel tank fill head comprising: a valve ( 3 ) that can be moved between an open position, in which fuel may be introduced into a fill pipe, and a closed position in which the fill pipe is closed, the valve ( 3 ) passing from one position to the other under the effect of a pressure exerted by a filling nozzle head; and a locking system comprising at least two rotatable fingers ( 4 ) and an actuation system capable of controlling the moveable fingers ( 4 ), the system additionally comprising a rotatable ring ( 1 ) equipped with pins ( 5 ) that are capable of cooperating with the moveable fingers ( 4 ) and the valve ( 3 ) that comprises housings ( 6 ) that are capable of cooperating with the moveable fingers ( 4 ) when the sealing system is in a locking position. The invention also relates to a fill pipe equipped with such a sealing system.

1 . A sealing system for fuel tank fill head comprising
 a valve ( 3 ) that can be moved between an open position, in which fuel may be introduced into a fill pipe, and a closed position in which the fill pipe is closed, the valve ( 3 ) passing from one position to the other under the effect of a pressure exerted by a filling nozzle head; and   a locking system comprising at least two rotatable fingers ( 4 ) and an actuation system capable of controlling the moveable fingers ( 4 ),   the system additionally comprising a rotatable ring ( 1 ) equipped with pins ( 5 ) that are capable of cooperating with the moveable fingers ( 4 ) and the valve ( 3 ) that comprises housings ( 6 ) that are capable of cooperating with the moveable fingers ( 4 ) when the sealing system is in a locking position.   
   
   
       2 . The sealing system according to the preceding claim, wherein each finger ( 4 ) is associated with a vertical rod ( 2 ′) firmly attached to a pipe head body ( 2 ) and onto which rod the finger ( 4 ) is inserted via an opening ( 4 ′) made in the finger ( 4 ). 
   
   
       3 . The sealing system according to  claim 1 , wherein the locking system comprises at least three moveable fingers ( 4 ) that are positioned symmetrically relative to the longitudinal axis of the fill head. 
   
   
       4 . The sealing system according to  claim 1 , wherein the housings ( 6 ) are produced in the valve ( 3 ) and have an opening oriented substantially orthogonal relative to the longitudinal axis of the fill head. 
   
   
       5 . The sealing system according to the preceding claim, in which the housings ( 6 ) have at least one sloping surface against which the moveable fingers ( 4 ) press, so that when the system is locked the moveable ring ( 1 ) and the valve ( 3 ) compress the gasket. 
   
   
       6 . The sealing system according to the preceding claim, in which the moveable fingers ( 4 ) are substantially thinner (narrower) than the housings ( 6 ) and are equipped with an excrescence ( 4 ″) of appropriate shape and size so that the fingers ( 4 ) slide over the sloped surface of the housings ( 6 ) with the aid of said relief. 
   
   
       7 . The sealing system according to  claim 1 , wherein each moveable finger ( 4 ) has a guide ( 9 ) intended to receive a pin ( 5 ) of the moveable ring ( 1 ) so that when this ring is rotated, each pin ( 5 ) exerts a force on the guide which has the effect of moving the moveable finger ( 4 ). 
   
   
       8 . The sealing system according to the preceding claim, in which the guide has a substantially oblong shape. 
   
   
       9 . A fill pipe for a fuel tank equipped with a sealing system according to  claim 1 . 
   
   
       10 . The fuel tank equipped with a fill pipe according to the preceding claim.