# US 12,006,737 B2 · Chain lock > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,737 B2 - Document ID: US12006737B2 - Status: Granted - Kind: B2 - Application number: 17/346,840 - Filed: 2021-06-14 - Published: 2021-12-16 - Granted: 2024-06-11 - Earliest claimed: 2020-06-15 - Assignees: ABUS August Bremicker Söhne KG - Applicants: ABUS August Bremicker Söhne KG - Inventors: Kenneth Wong - Web page: https://patentgrep.com/patent/US12006737B2 ## CPC - E05B 37/025: {in padlocks} - E05B 73/0005: {using chains, cables or the like (chain- or cable-locks of the padlock type E05B67/003; lockable clothing hangers or hanger racks E05B69/006)} - E05B 15/1614: {of hard materials, to prevent drilling (E05B67/04, E05B67/38 take precedence)} - E05B 37/0058: {by axial disengagement between hub and rim of tumbler discs or rings} - E05B 37/02: with tumbler discs or rings arranged on a single axis, each disc being adjustable independently of the others - E05B 67/003: {Chain, wire or cable locks (alarms therefor E05B45/005; E05B69/006 takes precedence)} - E05B 71/00: Locks specially adapted for bicycles, other than padlocks ({locks integral with holders for parking or storing bicycles B62H3/00;} locks integral with cycles B62H5/00) - E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS ## Abstract A chain lock includes a lock body having a first closure part, a second closure part, and a combination locking mechanism that is aligned along a lock axis. The chain lock having a bolt selectively locked to the lock body by the combination locking mechanism. The lock body has a chain connection part permanently connected to the bolt via a chain. The combination locking mechanism having a plurality of rotatable code setting rings arranged between the first and second closure parts. At a first end the lock body has at least one first fastening pin that engages through the housing sleeve into an annular groove of the chain connection part. At a second end the lock body has at least one second fastening pin that engages through the housing sleeve into the second closure part of the lock body and that fixes the second closure part to the housing sleeve. ## Claims ### Claim 1 A chain lock comprising a lock body, which has a first closure part, a second closure part, and a combination locking mechanism that is aligned along a lock axis, and a bolt that has a bolt mandrel, which can be introduced into the lock body, and that can be selectively locked to the lock body by the combination locking mechanism, wherein the lock body has a chain connection part that is permanently connected to the bolt via a chain, wherein the chain connection part and the bolt are aligned coaxially to one another in a locked state of the bolt, wherein the combination locking mechanism comprises a plurality of rotatable code setting rings that are arranged between the first closure part and the second closure part of the lock body, wherein the lock body comprises a housing sleeve that has an access window via which the code setting rings are accessible for a manual rotation, wherein the lock body has, at a first end associated with the chain connection part, at least one first fastening pin that engages through the housing sleeve into an annular groove of the chain connection part such that the chain connection part is rotatably supported at the housing sleeve, and wherein the lock body has, at a second end associated with the bolt, at least one second fastening pin that engages through the housing sleeve into the second closure part of the lock body and that fixes the second closure part to the housing sleeve. ### Claim 2 (depends on 1) The chain lock in accordance with claim 1, wherein the housing sleeve has a cylindrical shape. ### Claim 3 (depends on 1) The chain lock in accordance with claim 1, wherein the housing sleeve is made from steel, and wherein the first closure part of the lock body is made from a zinc die casting. ### Claim 4 (depends on 1) The chain lock in accordance with claim 1, wherein the first closure part of the lock body forms a base body that has a bearing prolongation which is aligned along a lock axis and at which the code setting rings are rotatably supported. ### Claim 5 (depends on 1) The chain lock in accordance with claim 1, wherein the at least one first fastening pin engages through the housing sleeve and through the first closure part of the lock body into the annular groove of the chain connection part. ### Claim 6 (depends on 1) The chain lock in accordance with claim 1, wherein at least one of the at least one first fastening pin or the at least one second fastening pin is radially aligned with respect to the lock axis. ### Claim 7 (depends on 1) The chain lock in accordance with claim 1, wherein the lock body has, at the first end, two first fastening pins that engage into the annular groove of the chain connection part, wherein the two first fastening pins are aligned coaxially to one another. ### Claim 8 (depends on 1) The chain lock in accordance with claim 1, wherein the second closure part of the lock body is annular and has an introduction opening for the bolt mandrel. ### Claim 9 (depends on 1) The chain lock in accordance with claim 1, wherein the second closure part is made from steel. ### Claim 10 (depends on 1) The chain lock in accordance with claim 1, wherein the bolt has a further chain connection part that is rotatably supported at a fastening section of the bolt. ### Claim 11 (depends on 10) The chain lock in accordance with claim 10, wherein the bolt has at least one third fastening pin that engages through the fastening section into an annular groove of the further chain connection part. ### Claim 12 (depends on 1) The chain lock in accordance with claim 1, wherein each of the plurality of code setting rings has, at an inner periphery, a blocking web that extends in a peripheral direction and that is interrupted by a release recess, wherein the bolt mandrel has a number of elevated locking portions along the lock axis corresponding to the number of code setting rings, and wherein the release recesses of the code setting rings are only aligned with respect to the elevated locking portions of the bolt mandrel, and the bolt is thus released for being detached from the lock body, when a secret code is set at the code setting rings. ### Claim 13 (depends on 12) The chain lock in accordance with claim 12, wherein each of the plurality of code setting rings is formed in multiple parts and has an outer marking ring and an inner tumbler ring that are rotationally fixedly connected to one another in an operating state of the combination locking mechanism, wherein, in a lock secret changing state of the combination locking mechanism, an angular position of the marking rings relative to the tumbler rings is selectively adjustable to change the secret code. ### Claim 14 (depends on 1) The chain lock in accordance with claim 1, wherein the at least one first fastening pin engages through the housing sleeve into the annular groove of the chain connection part such that the chain connection part is rotatably supported about the lock axis at the housing sleeve.