Clousure System For Fuel Tank Filling Pipe

Abstract

A closure system for the head of a fuel tank filling pipe, including: an essentially circular closure piece provided with a relief; and a moving part for (un)locking the closure piece by a rotational movement about the axis of the closure piece, the moving part including a relief configured to engage with the relief of the closure piece by a bayonet system. The reliefs are of a symmetrical shape allowing continuous rotation in both the clockwise and anticlockwise directions of the moving part relative to the closure piece.

1 - 10 . (canceled) 
   
   
       11 . A closure system for a head of a fuel tank filling pipe, comprising:
 an essentially circular closure piece provided with a relief; and   a moving part for (un)locking the closure piece by a rotational movement about the axis of the closure piece, the moving part including a relief configured to engage with the relief of the closure piece by a bayonet system,   the reliefs being of a symmetrical shape allowing continuous rotation in both clockwise and anticlockwise directions of the moving part relative to the closure piece.   
   
   
       12 . The system according to  claim 11 , the system enabling automatic opening of the pipe through action of a filling nozzle when in the unlocked position. 
   
   
       13 . The system according to  claim 12 , wherein the closure piece is in a form of a moving plate pivoting about an axis. 
   
   
       14 . The system according to  claim 11 , further comprising a rod connected to the pipe head, fixed to a periphery of the closure piece and enabling the closure piece to pivot, the rod including a torsion spring with one end connected to the closure piece and enabling the closure piece to be kept in a closed position. 
   
   
       15 . The system according to  claim 11 , wherein the reliefs of the bayonet system are located in a first case on an inner surface of the rotary piece, which is in a shape of a ring, and a second case on a perimeter of the closure piece, and wherein the reliefs have a geometry that allows a rotary movement of the ring between locked and unlocked positions of the bayonet, and also allows a vertical movement parallel to the axis of the closure piece of the ring for compression/decompression of a seal situated between the closure piece and the pipe head. 
   
   
       16 . The system according to  claim 15 , wherein the closure piece comprises arms and the ring comprises a shelf and recesses corresponding in number, size, and shape to the arms of the closure piece, and wherein the shelf and the arms are bevelled in a complementary manner. 
   
   
       17 . The system according to  claim 16 , wherein the shelf comprises a repetition of a following alternation: descending profile; flat profile; rising profile; recess. 
   
   
       18 . The system according to  claim 11 , wherein the moving part comprises a drive tongue. 
   
   
       19 . The system according to  claim 11 , wherein the moving part includes teeth on its outer perimeter. 
   
   
       20 . The system according to  claim 11 , further comprising a protective shield for the closure piece, which is movable in a same plane by pivoting about an axis parallel to the axis of the pipe.