# US 9,517,551 B2 · Fuel injector assembly apparatus and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,517,551 B2 - Document ID: US9517551B2 - Status: Granted - Kind: B2 - Application number: 13/911,954 - Filed: 2013-06-06 - Published: 2014-12-11 - Granted: 2016-12-13 - Earliest claimed: 2013-06-06 - Assignees: LR Inventions, LLC - Applicants: LR Inventions, LLC - Inventors: Ricardo Perez, Jr. - Web page: https://patentgrep.com/patent/US9517551B2 ## CPC - B25B 27/0035: {for motor-vehicles (wrenches for mounting or dismounting wheels B60B29/003)} - B25B 27/04: inserting or withdrawing keys - F02M 61/168: {Assembling; Disassembling; Manufacturing; Adjusting} - Y10T 29/49405: Valve or choke making - Y10T 29/53552: Valve applying or removing - B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A fuel injector assembly tool includes a frame coupled to a gun body, and a push rod configured to traverse through the frame and the gun body, the gun body having a fixed handle and a trigger for causing distal movement of the push rod as the trigger moves towards the fixed handle. The tool further includes a pressure rod coupled to or forming a portion of the push rod, the pressure rod being arranged and constructed to apply pressure to a tip of a fuel injector to compress springs within the fuel injector and maintain internal alignment of fuel injector components. In one arrangement, the tool includes a pressure rod adaptor nut coupling the push rod to the pressure rod. A method of re-assembly of a fuel injector using the fuel injector assembly tool is disclosed. Additional embodiments are disclosed. ## Claims ### Claim 1 A tool, comprising: a modified caulking gun assembly having a gun rack, a gun body, and a push rod configured to traverse through the gun rack and the gun body, the gun body having a fixed handle and a trigger for causing distal movement of the push rod as the trigger moves towards the fixed handle; a pressure rod adaptor nut coupled to the push rod; a pressure rod coupled to the push rod via the pressure rod adaptor nut, the pressure rod configured to apply pressure to a tip of an injector; and at least one magnet coupled to the pressure rod adaptor nut and arranged and constructed to hold a lower injector housing of the injector in place for assembly. ### Claim 2 (depends on 1) The tool of claim 1, comprising two magnets coupled to the pressure rod adaptor nut and arranged and constructed to hold a lower injector housing of the injector in place for assembly. ### Claim 3 (depends on 1) The tool of claim 1, comprising a release lever behind the fixed handle enabling the distal extension of the push rod in a forward or backward direction. ### Claim 4 (depends on 1) The tool of claim 1, comprising a front end of the gun rack constructed to fit an upper injector housing of the injector. ### Claim 5 (depends on 1) The tool of claim 1, further forming a system operating cooperatively with a rectangular socket coupled to a drive ratchet constructed to torque a body of the injector. ### Claim 6 (depends on 1) The tool of claim 1, further forming a system operating cooperatively with an injector holder comprising two alignment plates spring biased in opposing directions and constructed to fit within a vice, wherein each alignment plate includes a guide pin arranged to maintain placement of a lower injector housing of the injector. ### Claim 7 (depends on 6) The tool of claim 6, the system further comprising at least one magnet embedded within at least one of the two alignment plates. ### Claim 8 (depends on 1) The tool of claim 1, wherein the tool is configured to assemble or disassemble the injector in the form of a hydraulically actuated electronic unit injection (HEUI) fuel injector system. ### Claim 9 (depends on 1) The tool of claim 1, wherein the pressure rod is configured to apply pressure to a tip of the injector to compress springs within the injector and maintain internal alignment of components of the injector during assembly. ### Claim 10 A fuel injector assembly tool, comprising: a frame coupled to a caulking gun body, and a push rod configured to traverse through the frame and the caulking gun body, the caulking gun body having a fixed handle and a trigger for causing distal movement of the push rod as the trigger moves towards the fixed handle; and a pressure rod coupled to or forming a portion of the push rod, the pressure rod being configured to apply pressure to a tip of a fuel injector to compress springs within the fuel injector and maintain internal alignment of fuel injector components; and at least one magnet coupled to a pressure rod adaptor nut that couples the push rod to the pressure rod and is arranged and constructed to hold a lower injector housing of the fuel injector in place for assembly. ### Claim 11 (depends on 10) The fuel injector assembly tool of claim 10, wherein the tool is configured to assemble or disassemble the injector in the form of a hydraulically actuated electronic unit injection (HEUI) fuel injector system. ### Claim 12 (depends on 10) The fuel injector assembly tool of claim 10, comprising at least two magnets coupled to a pressure rod adaptor nut that couples the push rod to the pressure rod and is arranged and constructed to hold a lower injector housing of the fuel injector in place for assembly. ### Claim 13 (depends on 10) The fuel injector assembly tool of claim 10, further comprising a release lever behind the fixed handle enabling the distal extension of the push rod in a forward or backward direction.