# US 7,610,843 B2 · Individual firearm with improved recock device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,610,843 B2 - Document ID: US7610843B2 - Status: Granted - Kind: B2 - Application number: 11/191,836 - Filed: 2005-07-28 - Published: 2007-01-18 - Granted: 2009-11-03 - Earliest claimed: 2004-08-03 - Assignees: Fabrica d'Armi Pietro Beretta S.p.A. - Inventors: Ugo Gussalli Beretta - Web page: https://patentgrep.com/patent/US7610843B2 ## CPC - F41A 5/30: Gas- or recoil-operated, e.g. selection of gas- or recoil-operated systems - F41A 5/28: Adjustable systems - F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE ## Abstract An individual firearm with improved recock device comprising a casing (12), a barrel (13), a breech bolt (14), a breech bolt slide (15), wherein the barrel (13) has at least one hole (32), or gas bleeding port, communicating with a gas intake cylinder (19) which houses a piston gas intake assembly (20), which is connected to operating rods (31) integral to the breech bolt slide (15), comprises at least one first inertial spring (27, 27′) arranged between the breech bolt slide (15) and the gas intake cylinder (19), adapted for causing a variable, inertial and/or gas intake actuation. ## Claims ### Claim 1 An individual firearm with improved recock device comprising: a casing (12), a barrel (13), a breech bolt (14), a breech bolt slide (15), said barrel (13) being housed in casing (12) and comprising at least one gas bleeding port (32), which communicates with a gas intake cylinder (19) which in turn houses a piston gas intake assembly (20), said piston gas intake assembly (20) being connected to operating rods (31) which arc connected to said breech bolt slide (15), which is connected to the breech bolt (14) at an end of said barrel (13), said piston gas intake assembly (20) comprising inertial spring (27) which is compressible by the recoil of the casing and breech bolt (14) by the firing of a cartridge, said inertial spring (27) being positioned between said breech bolt slide (15) and said gas intake cylinder (19), said gas intake cylinder (19) having a piston body (21) which is capable of moving independently of the piston gas intake cylinder (20) by force resulting from firing a cartridge, said piston gas intake assembly (20) further comprising an elastic scaling band (22) which is adapted to close said at least one gas bleeding port (32) when sufficient force is applied to inertial spring (27) by the firing of said cartridge, said elastic sealing band (22) being fitted on piston body (21), said inertial spring being a helical spring which is arranged so that in response to the firing of a cartridge, said piston body (21) and said inertial helical spring cause said operating rods (31) to recock said firearm. ### Claim 2 (depends on 1) A firearm according to claim 1, wherein said piston body (21) having an elastic sealing band (22) adapted for closing said gas bleeding ports (32), said elastic sealing band being positioned at an end of said piston body (21) which is opposite to an end of said piston body (21) which has a ring nut element (26) which communicates with a fixed point of said inertial spring (27) of the piston gas intake assembly (20) so as to contain said inertial spring while under compression, said piston body (21) further comprising a flange (24) which is capable of sliding along said piston body (21), to exert a compressive force on mobile paint of said inertial spring of piston gas intake assembly (20). ### Claim 3 (depends on 1) A firearm according to claim 1, wherein piston body (21) is calibrated to change its resting position with respect to gas bleeding ports (32) during the firing of strong cartridges (33) said piston body (21) has a relative in dial advance motion relative to said gas intake cylinder (19) for an inertial operation of said firearm, which completely closes said gas bleeding ports (32) to gases (37) wider pressure in said barrel (13), and during the firing of weak cartridges (34), said piston body (21) has a lower relative advance motion as compared to the motion of piston body (21) during firing of strong cartridges (33), which causes said piston body (21) not to interfere with said ports (32) so that said ports (32) remain open to allow said gases (37) to act on said piston body (21). ### Claim 4 (depends on 1) A firearm according to claim 1, wherein inertial spring (27) has an elastic characteristic by which the moment of maximum compression under the effect of the recoil of said casing (12), coincides with the gas bleeding through gas bleeding port (32) in the firing of weak cartridges (34), or with the passage of a wad (35) of a weak cartridge (34) on said gas bleeding ports (32), to recock the firearm. ### Claim 5 An individual firearm with improved recock device comprising: a casing (12), a barrel (13), a breech bolt (14), a breech bolt slide (15), said barrel (13) being housed in casing (12) and comprising at least one gas bleeding port (32), which communicates with a gas intake cylinder (19) which in turn houses a piston gas intake assembly (20), said piston gas intake assembly (20) being connected to operating rods (31) which are connected to said breech bolt slide (15), which is connected to the breech bolt (14) at an end of said barrel (13), said piston gas intake assembly (20) comprising a piston body (21) in gas intake cylinder (19), said piston body (21) being in contact with operating rods (31), said firearm having an inertial spring (27′) arranged between said breech bolt (14) and said breech bolt slide (15) where it is compressed by the recoil of breech bolt (14) against said breech bolt slide (15), said gas intake cylinder (19) being adapted to receive gas (37) resulting from firing a cartridge, said gas (37) being passed from barrel (13) to said gas intake cylinder (19) though said gas bleeding port (32) where said gas exerts a force on said piston body (21) and said piston body (21) in cooperation with said compressible inertial spring (27′) exerts a force on said operating rods (31) that recock said firearm wherein piston body (21) is calibrated to change its resting position with respect to said at least one gas bleeding port (32) during the firing of strong cartridges (33) said piston body (21) having a relative inertial advance motion relative to said gas intake cylinder (19) for an inertial operation of said firearm, which completely closes said gas bleeding ports (32) to gases (37) under pressure in said barrel (13), and during the firing of weak cartridges (34), said piston body (21) has a lower relative advance motion as compared to the motion of piston body (21) during firing of strong cartridges (33), which causes said piston body (21) not to interfere with said ports (32) so that said ports (32) remain open to allow said gases (37) to act on said piston body (21). ### Claim 6 (depends on 5) A firearm according to claim 5 wherein said piston gas intake assembly (20) comprises a second return spring (127) so as to return the said flange (24) to a position in said gas intake piston body (21). ### Claim 7 (depends on 5) A firearm according to claim 5, wherein said inertial spring (27′) has an elastic characteristic by which the moment of maximum compression under the effect of the recoil of said casing (12), coincides with the gas bleeding through gas bleeding port (32) in the firing of weak cartridges (34), or with the passage of a wad (35) of a weak cartridge (34) on said gas bleeding ports (32), to recock the firearm.