# US 7,610,788 B2 · Machine and method for preventing torsion of wire, material of prismatic cross-section, and rod material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,610,788 B2 - Document ID: US7610788B2 - Status: Granted - Kind: B2 - Application number: 11/559,488 - Filed: 2006-11-14 - Published: 2007-05-17 - Granted: 2009-11-03 - Earliest claimed: 2005-11-15 - Inventors: Antonios Anagnostopoulos - Web page: https://patentgrep.com/patent/US7610788B2 ## CPC - B21D 11/12: the articles being reinforcements for concrete - B21D 43/006: {Feeding elongated articles, such as tubes, bars, or profiles} - B21F 1/00: Bending wire other than coiling; Straightening wire - B21F 23/00: Feeding wire in wire-working machines or apparatus - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - B21F: WORKING OR PROCESSING OF METAL WIRE (rolling of metal wire B21B1/16; by drawing, auxiliary operations used in connection with metal-working without essentially removing material B21C) ## Abstract A machine and method according to which advancing material (1) such as wire, prismatic material, or rod is gripped during the duration of its advancement from an advancement unit (2) towards a bending unit (3). The gripping is effected by a jaw (4) that grips material (1) with sufficient force so that the material (1) cannot twist. By gripping the advancing material (1), the under-production part (16) is simultaneously gripped and prevented from rotating, so that bends are made in the correct plane and the bent product is produced with great accuracy. ## Claims ### Claim 1 A bending machine preventing torsion in wire, comprising: a bending unit configured to bend wire; an advancement unit configured to advance wire to said bending unit; an antitorsion jaw assembly disposed between said advancement unit and said bending unit; a carrier configured to carry said antitorsion jaw assembly; said carrier being movably supported on a guide; a return mechanism configured to bias said carrier in the direction towards said advancement unit; said antitorsion jaw assembly is configured to grip advancing wire to pull along said jaw assembly, said carrier, and said return mechanism; and, a motor configured to actuate said antitorsion jaw assembly to grip wire. ### Claim 2 (depends on 1) The bending machine preventing torsion in wire as claimed in claim 1, wherein: said return mechanism includes a weight. ### Claim 3 (depends on 1) The bending machine preventing torsion in wire as claimed in claim 1, wherein: said return mechanism includes a spring. ### Claim 4 (depends on 1) A bending machine preventing torsion in wire as claimed in claim 1, further comprising: said carrier including a plate; and, said carrier further including a wagon carrier connected to said plate and movably supported on said guide. ### Claim 5 (depends on 4) The bending machine preventing torsion in wire as claimed in claim 4, wherein: said antitorsion jaw assembly is mounted on said plate. ### Claim 6 (depends on 5) A bending machine preventing torsion in wire as claimed in claim 5, further comprising: said antitorsion jaw assembly including a first jaw piece extending through said plate. ### Claim 7 (depends on 1) A bending machine preventing torsion in wire as claimed in claim 1, further comprising: a limit switch configured to detect position of said antitorsion jaw assembly between said advancement unit and said bending unit. ### Claim 8 (depends on 1) The bending machine preventing torsion in wire as claimed in claim 1, wherein: said motor comprises a pneumatic motor. ### Claim 9 A bending machine preventing torsion in wire, comprising: a bending unit configured to bend wire; an advancement unit configured to advance wire to said bending unit; an antitorsion jaw assembly disposed between said advancement unit and said bending unit; a carrier configured to carry said antitorsion jaw assembly; a first jaw piece, said first jaw piece having a portion extending through said carrier; and, a second jaw piece extending from above said carrier; and, a motor connected to said portion and configured to actuate said first jaw piece to grip wire between said first jaw piece and said second jaw piece to result in said antitorsion jaw assembly and said carrier being pulled along by advancing wire. ### Claim 10 (depends on 9) A bending machine preventing torsion in wire as claimed in claim 9, further comprising: a limit switch configured to detect position of said antitorsion jaw assembly between said advancement unit and said bending unit. ### Claim 11 (depends on 9) A bending machine preventing torsion in wire as claimed in claim 9, further comprising: a return mechanism configured to return said carrier in a direction toward said advancement unit. ### Claim 12 (depends on 9) The bending machine preventing torsion in wire as claimed in claim 9, wherein: said motor is a pneumatic motor. ### Claim 13 An antitorsion assembly for a bending machine, comprising: an antitorsion jaw assembly configured to grip wire against torsion; a carrier configured to carry said antitorsion jaw assembly; a guide configured to movably support said carrier; a return mechanism configured to pull said carrier in a first direction along said guide; and, a motor configured to activate said antitorsion jaw assembly to grip advancing wire to pull along said jaw assembly for passively advancing said antitorsion jaw assembly and said carrier in a second direction along said guide. ### Claim 14 (depends on 13) The antitorsion assembly for a bending machine and claimed in claim 13, wherein: said return mechanism includes a weight. ### Claim 15 (depends on 13) An antitorsion assembly for a bending machine and claimed in claim 13, further comprising: a limit switch configured to detect position of said antitorsion jaw assembly along said guide. ### Claim 16 (depends on 13) An antitorsion assembly for a bending machine and claimed in claim 13, further comprising: said carrier including a plate; and, said carrier further including a wagon carrier connected to said plate and movably supported on said guide. ### Claim 17 (depends on 16) An antitorsion assembly for a bending machine and claimed in claim 16, further comprising: said antitorsion jaw assembly including a first jaw piece extending through said plate. ### Claim 18 (depends on 17) An antitorsion assembly for a bending machine and claimed in claim 17, further comprising: said antitorsion jaw assembly including a second jaw piece extending from said plate. ### Claim 19 (depends on 18) The antitorsion assembly for a bending machine and claimed in claim 18, wherein: said motor activates said first jaw piece.