Loading device for a semi-automatic rifle

Abstract

A loading device for a semi-automatic rifle, in which said rifle comprises a barrel ( 2 ) in which a cartridge ( 3 ) may be inserted, operable by a loading and firing mechanism ( 4 ). The device comprises a piston ( 12 ), slidable over a gas cylinder ( 11 ) of said rifle, which operates said loading and firing mechanism ( 4 ), and is actuated by a recovered portion of the gases generated by the combustion of the charge contained in the cartridge.

1 . Loading device for a semi-automatic rifle, said rifle comprising a barrel ( 2 ) in which a cartridge ( 3 ) may be inserted, operable by a loading and firing mechanism ( 4 ), said device comprising a piston ( 12 ), slidable over a gas cylinder ( 11 ) of said rifle, which operates said loading and firing mechanism ( 4 ), and is actuated by a recovered portion of the gases generated by the combustion of the charge contained in the cartridge, characterised in that it comprises 
 a compressible and deformable toroidal, elastomeric body ( 20 ) capable of transmitting to said piston ( 12 ) the thrust generated by said recovered portion of gas in a thrust chamber (S).    
   
   
       2 . Device according to  claim 1 , in which said toroidal, elastomeric body ( 20 ) encloses a sleeve ( 10 ) integral with said piston ( 12 ).  
   
   
       3 . Device according to  claim 2 , in which said sleeve is slidable over said gas cylinder ( 11 ).  
   
   
       4 . Device according to  claim 2 , in which said toroidal, elastomeric body ( 20 ) and said sleeve are inserted in a cylindrical body ( 8 ) joined at one of its ends to a support ( 9 ), connected to said barrel ( 2 ).  
   
   
       5 . Device according to  claim 4 , in which said support ( 9 ) comprises a channelling ( 7 ) which directs the gas recovered from the barrel toward the thrust chamber (S).  
   
   
       6 . Device according to  claim 1 , in which said sleeve comprises an annular portion ( 101 ) at one of its ends which is associated to piston ( 12 ), and at the opposite end a control ring ( 17 ).  
   
   
       7 . Device according to  claim 6 , in which said toroidal, elastomeric body is inserted between said annular portion and said control ring and is maintained in contact with the sleeve by way of an elastic ring ( 18 ).  
   
   
       8 . Device according to  claim 7 , in which said thrust chamber (S) is delimited by the control ring ( 17 ) by the outer surface of the gas cylinder ( 11 ) and by the walls of the support ( 9 ).  
   
   
       9 . Device according to  claim 8 , in which said control ring ( 17 ) determines the thrust surface for the gases which come from the channelling ( 7 ) contained in said thrust chamber.  
   
   
       10 . Device according to  claim 9 , in which said piston ( 12 ) is maintained in contact with said sleeve ( 10 ) by way of an annular spring ( 15 ), enclosing said gas cylinder ( 11 ), and blocked at one of its ends by a shoulder ( 16 ) of said rifle butt ( 14 ).