# US 7,610,709 B2 · Antidismantling device for hand-guns > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,610,709 B2 - Document ID: US7610709B2 - Status: Granted - Kind: B2 - Application number: 12/223,547 - Filed: 2007-01-26 - Published: 2009-09-03 - Granted: 2009-11-03 - Earliest claimed: 2006-02-04 - Assignees: Carl Walther GmbH - Inventors: Stefan Eith; Wulf-Heinz Pflaumer; Franz Wonisch - Web page: https://patentgrep.com/patent/US7610709B2 ## CPC - F41A 17/42: Safeties for locking the breech-block or bolt in a safety position (F41A17/32, F41A17/36, F41A17/40 take precedence {; anti-rebound arrangements F41A3/70}) - F41A 9/53: Charged-condition indicators, i.e. indicating the presence of a cartridge in the cartridge chamber - F41A: FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE ## Abstract An antidismantling device for preventing dismantling of a hand-gun when a cartridge is present in the barrel (102) of the hand-gun, the barrel (102) being mounted in a breech block (110), and a guide pin (123), which is biased at least indirectly in the direction of the longitudinal axis of the barrel (102), is slidably mounted in a bearing (113) in the breech block (110), and one end of the guide pin at least indirectly abuts a contact surface (121) for making contact with part of a cartridge (101), and the position of the guide pin in relation to the breech block (110) when a cartridge (101) is present in the barrel (102) differs from the position thereof assumed in the absence of a cartridge (101) in the barrel (102) is created in that the guide pin (123) interacts at least indirectly with a safety mechanism (141) provided on the grip of the hand-gun in order to prevent dismantling of the breech block (110) when a cartridge (101) is present in the barrel (102) of the handgun. ## Claims ### Claim 1 An antidismantling device for preventing dismantling of a hand-gun when a cartridge is present in the barrel (102) of the hand-gun, said barrel (102) being mounted in a breech block (110), and a sensor element (123), which is biased at least indirectly in the direction of the longitudinal axis (143) of the barrel (102), is located in the breech block (110) and comprises in the region of one end thereof at least indirectly a contact surface (121) for making contact with part of a cartridge (101) and assumes a position in relation to the breech block (110) when a cartridge (101) is present in the barrel (102) which differs from the position thereof assumed in the absence of a cartridge (101) in the barrel (102) and the sensor element (123) interacts at least indirectly with a safety mechanism (141) provided on the grip of the hand-gun in order to prevent dismantling of the breech block (110) when a cartridge (101) is present in the barrel (102) of the hand-gun wherein the sensor element is in the form of a guide pin which is biased at least indirectly in the direction of the longitudinal axis of the barrel and is slidably mounted in a bearing in the breech block, and one end of the guide pin at least indirectly abuts a contact surface for making contact with part of a cartridge and the guide pin (123) comprises a bearing surface (124) for functioning coactively with a pressure piece (131), which is biased by a spring (130) and which urges the indicator element (120) and thus the contact element (122) in the direction of the longitudinal axis of the barrel (102). ### Claim 2 (depends on 1) The device as defined in claim 1, wherein the safety device (141) is formed by a guide means (127) of the hand-gun provided on a grip of the hand-gun and aligned parallel to the longitudinal axis of the breech block (110) and formed on the breech block guide (140) of the hand-gun. ### Claim 3 (depends on 2) The device as defined in claim 2, wherein a recess (126) is provided near the other end (125) of the guide pin (123), which recess is dimensioned in such a way that the guide means (127) can be inserted in the recess only in the absence of a cartridge (101) in the barrel (102). ### Claim 4 (depends on 2) The device as defined in claim 2, wherein the guide means (127) is formed by the breech block guide (140) of the gun. ### Claim 5 (depends on 3) The device as defined in claim 3, wherein the guide pin (123) is connected to a contact element (122), on which the contact surface (121) that makes contact with part of a cartridge (101) is formed. ### Claim 6 (depends on 5) The device as defined in claim 5, wherein the contact element (122) is in the form of a pin which is at a predefined angle in relation to the guide pin (123) and is mounted in a bearing (113) of the breech block (110) in such a way that its free end (125) is disposed in the region of a lateral surface 112 of the breech block. ### Claim 7 (depends on 6) The device as defined in claim 6, wherein said angle is from approx. 35° to 65°. ### Claim 8 (depends on 1) The device as defined in claim 1, wherein the guide pin (123) comprises a bearing surface (124) for functioning coactively with a pressure piece (131), which is biased by a spring (130) and which urges the indicator element (120) and thus the contact element (122) in the direction of the longitudinal axis of the barrel (102). ### Claim 9 (depends on 3) The device as defined in claim 3, wherein the recess of the guide pin (123) is preferably moved in such a way that, when a cartridge (101) is present in the barrel (102), the free end (125) of the guide pin (123) obstructs insertion of the guide means (127) and prevents removal of the breech block (110). ### Claim 10 (depends on 6) The device as defined in claim 6, wherein a subregion of the breech block guide (140) comprises a shift gate (141) acting as a safety device for interaction with the free end (125) of the guide pin (123). ### Claim 11 (depends on 6) The device as defined in claim 6, wherein a subregion of the breech block guide (140) comprises a shift gate (141) for interaction with the recess (126) in the guide pin (123). ### Claim 12 (depends on 5) The device as defined in claim 5, wherein a contact element (122) is disposed in an upper region of the breech block (110) and is mounted such that when a cartridge (101) is present in the barrel (102), the contact element projects from that region of the surface (111) of the breech block that is centrally disposed in relation to the lateral surfaces (112) of the breech block, in order to act as an optical and/or tactile indicator element (120) for indicating the presence of a cartridge (101) in the barrel (102). ### Claim 13 (depends on 12) The device as defined in claim 12, wherein the indicator element (120) is guided at least partly in a recess (103) of the barrel (102). ### Claim 14 (depends on 12) The device as defined in claim 12, wherein the indicator element (120), the contact element (122), and the guide pin (123) are formed as a single piece.