# US 7,578,161 B1 · Pneumaticaly driven pipe swedging and flaring tools > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,578,161 B1 - Document ID: US7578161B1 - Status: Granted - Kind: B1 - Application number: 12/175,460 - Filed: 2008-07-18 - Granted: 2009-08-25 - Earliest claimed: 2008-07-18 - Inventors: Marion M. Sizemore - Web page: https://patentgrep.com/patent/US7578161B1 ## CPC - B21J 13/02: Dies or mountings therefor - B21D 41/021: {by means of tube-flaring hand tools} - Y10T 29/49373: Tube joint and tube plate structure - Y10T 29/49375: including conduit expansion or inflation - B21J: FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P9/04; compacting surfaces by blasting with particulate material B24C1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27) - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Tools for expanding (i.e., flaring and swedging) the ends of metal tubes are configured for attachment to a powered impact hammer, such as an air hammer. A swedging tool for swedging an end of a metal tube has a swedging body with a die section for expanding the tube when driven thereinto and a flanged shank attached to the swedging body and configured for engagement by a powered impact hammer. A flaring tool for flaring an end of a metal tube includes a flaring body having a die section for flaring the tube when driven thereinto. A flanged shank is attached to the flaring body and configured for engagement by a powered impact hammer. A method for expanding an end of a metal tube entails attaching a die body for expanding the end of the metal tube to a powered impact hammer, aligning the die body with the inner diameter of the metal tube, activating the powered impact hammer, and urging the die body a determined distance into the metal tube. ## Claims ### Claim 1 A swedging tool for expanding an end of a first metal tube having a first inner diameter and a first outer diameter and an end of a second metal tube having a second inner diameter and a second outer diameter comprising a swedging body having a die section for expanding the first metal tube when driven thereinto; and a flanged shank attached to said swedging body and configured for engagement by a powered impact hammer, said die section comprising: a cylindrical first body section having a diameter that is equal to the first inner diameter of the first metal tube, and a cylindrical second body section having a diameter that is equal to the first outer diameter the first metal tube, and a first chamfered transition from said first body section to said second body section, and a cylindrical third body section having a diameter that is about equal to the second outer diameter of the second metal tube, and said cylindrical second body section having a diameter that is about equal to the second inner diameter the second metal tube, and a second chamfered transition from said second body section to said third body section. ### Claim 2 (depends on 1) A swedging tool according to claim 1, said flanged shank being configured for engagement by a retainer spring of a powered impact hammer. ### Claim 3 (depends on 2) A swedging tool according to claim 2, said flanged shank having a cylindrical proximal shank body sized for engagement by a powered impact hammer, a distal shank body, and a flange disposed therebetween. ### Claim 4 (depends on 3) A swedging tool according to claim 3, said flange having a chamfered trailing edge and a leading edge substantially perpendicular to a longitudinal axis of the swedging tool. ### Claim 5 (depends on 4) A swedging tool according to claim 4, said proximal shank body having a diameter of about 0.40 inches. ### Claim 6 (depends on 4) A swedging tool according to claim 4, said distal shank body having a diameter of about 0.50 inches. ### Claim 7 (depends on 4) A swedging tool according to claim 4, said flange having a diameter of about 0.80 inches. ### Claim 8 (depends on 4) A swedging tool according to claim 4, said proximal shank body having a diameter of about 0.40 inches and said distal shank body having a diameter of about 0.50 inches. ### Claim 9 (depends on 4) A swedging tool according to claim 4, said proximal shank body having a diameter of about 0.40 inches and said distal shank body having a diameter of about 0.50 inches, and said flange having a diameter of about 0.80 inches. ### Claim 10 (depends on 1) A swedging tool according to claim 1, said flanged shank being threadedly connected to the swedging body. ### Claim 11 (depends on 1) A swedging tool according to claim 1, said flanged shank being integrally formed and permanently connected to the swedging body. ### Claim 12 (depends on 1) A swedging tool according to claim 1, said swedging tool being further configured to expand an end of a third metal tube having a third inner diameter and a third outer diameter, said die section further comprising a cylindrical fourth body section having a diameter that is about equal to the third outer diameter of the third metal tube, and said cylindrical third body section having a diameter that is about equal to the third inner diameter the third metal tube, and a third chamfered transition from said third body section to said fourth body section.