Self-actuating firearm
First Claim
Patent Images
1. A self-actuating firearm comprising:
- a frame;
a breechblock;
a barrel provided with a bore;
a cylinder associated with said barrel and forming an internal chamber which is connected to the bore of the barrel by means of a gas tap; and
a piston which is at least partially accommodated in said chamber and can be actuated by gases that arrive from said bore upon firing of the firearm, said piston floating with respect to said cylinder and said frame and being integral with a recocking element which is external to said cylinder and is adapted to act with an impulsive action on said breechblock In order to recock the firearm upon firing, a seal means being provided between said piston and an Inner surface of said cylinder in order to improve the sliding of said piston inside said cylinder, said seal means comprising external seal rings and internal seal rings, wherein said external seal rings provide a seal on the cylinder surface while having a play with respect to the piston, said internal seal rings providing a seal with respect to an outer piston surface while having a play with respect to the cylinder, in order to simplify the production of said seal means and in order to provide a self centering assembly of respective parts of the firearm.
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Accused Products
Abstract
A self-actuating firearm comprising a frame, a breechblock, a barrel provided with a bore, a cylinder which is associated with the barrel and forms an internal chamber which is connected to the bore of the barrel, by means of a gas tap, and a piston which is at least partially accommodated in the chamber and can be actuated by the gases that arrive from the bore upon firing. The piston floats with respect to the cylinder and the frame and comprises a portion which is external to the cylinder and is adapted to act with an impulsive action on the breechblock in order to recock the firearm upon firing.
64 Citations
20 Claims
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1. A self-actuating firearm comprising:
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a frame;
a breechblock;
a barrel provided with a bore;
a cylinder associated with said barrel and forming an internal chamber which is connected to the bore of the barrel by means of a gas tap; and
a piston which is at least partially accommodated in said chamber and can be actuated by gases that arrive from said bore upon firing of the firearm, said piston floating with respect to said cylinder and said frame and being integral with a recocking element which is external to said cylinder and is adapted to act with an impulsive action on said breechblock In order to recock the firearm upon firing, a seal means being provided between said piston and an Inner surface of said cylinder in order to improve the sliding of said piston inside said cylinder, said seal means comprising external seal rings and internal seal rings, wherein said external seal rings provide a seal on the cylinder surface while having a play with respect to the piston, said internal seal rings providing a seal with respect to an outer piston surface while having a play with respect to the cylinder, in order to simplify the production of said seal means and in order to provide a self centering assembly of respective parts of the firearm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A self-actuating firearm comprising:
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a frame;
a breechblock;
a barrel provided with a bore;
a cylinder associated with said barrel and forming an internal chamber which is connected to the bore of the barrel by means of a gas tap;
a piston which is at least partially accommodated in said chamber and can be actuated by gases that arrive from said bore upon firing of the firearm; and
a pair of floating pins each comprising a stem slidably inserted in a respective guide formed in said frame, a free end of the stem being adapted to make contact with a surface of the breechblock, said piston floating with respect to said cylinder and said frame and being integral with a recocking element which is external to said cylinder and is adapted to act with an impulsive action on said pins In order to recock the firearm upon firing, said pins being located between said recocking element and said breechblock.
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17. A self-actuating firearm comprising:
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a frame;
a breechblock;
a barrel provided with a bore;
a cylinder associated with said barrel and forming an internal chamber which is connected to the bore of the barrel by means of a gas tap;
a piston which is at least partially accommodated in said chamber and can be actuated by gases that arrive from said bore upon firing of the firearm;
a post rigidly coupled to said frame and extending along an entire length of said cylinder inside said chamber, said piston being slidingly mounted on said post, said post comprising a cylindrical block at an end opposite said piston, said cylindrical block protruding at least partially from a front end of the cylinder and extending into a front cylinder or cap; and
a safety valve arranged in a discharge chamber which is substantially inside said front cylinder or cap, said discharge chamber extends inside a fastening cap, screwed on said front cylinder or cap, with the interposition of a contrast spring which is substantially arranged inside a front portion of said discharge chamber. - View Dependent Claims (18, 19, 20)
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Specification