# US 2014/0359986 A1 · Fuel injector assembly apparatus and method

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- Number: US 2014/0359986 A1
- Document ID: US20140359986A1
- Status: Published application
- Kind: A1
- Application number: 13/911,954
- Filed: 2013-06-06
- Published: 2014-12-11
- Earliest claimed: 2013-06-06
- Assignees: LR Inventions, LLC
- Applicants: LR Inventions, LLC
- Inventors: Ricardo Perez, JR.
- Web page: https://patentgrep.com/patent/US20140359986A1

## 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; and
a pressure rod coupled to the push rod via the pressure rod adaptor nut, the pressure rod being arranged and constructed to apply pressure to a tip of an injector.

### Claim 2 (depends on 1)

The tool of claim 1, comprising 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 3 (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 4 (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 5 (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 6 (depends on 1)

The tool of claim 1, further comprising a rectangular socket coupled to a drive ratchet constructed to torque a body of the injector.

### Claim 7 (depends on 1)

The tool of claim 1, further comprising 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 8 (depends on 7)

The tool of claim 7, further comprising at least one magnet embedded within at least one of the two alignment plates.

### Claim 9 (depends on 1)

The tool of claim 1, wherein the injector is a hydraulically actuated electronic unit injection (HEUI) fuel injector system.

### Claim 10 (depends on 1)

The tool of claim 1, wherein the pressure rod is arranged and constructed 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 11

A fuel injector assembly tool, comprising:
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; and
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.

### Claim 12 (depends on 11)

The fuel injector assembly tool of claim 11, wherein the injector is a hydraulically actuated electronic unit injection (HEUI) fuel injector system.

### Claim 13 (depends on 11)

The fuel injector assembly tool of claim 11, 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 14 (depends on 11)

The fuel injector assembly tool of claim 11, further comprising a pressure rod adaptor nut coupling the push rod to the pressure rod.

### Claim 15

A method, comprising:
fixing a lower injector housing portion of the fuel injector assembly in a fixed position with a vice;
separating a body from the fuel injector assembly from the upper injector housing portion and exposing internal components;
loosening the lower injector housing portion from the vice;
inverting the lower injector housing portion and vertically feeding the lower injector housing up a push rod configured to traverse through a frame and a gun body of a fuel injector assembly tool, 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;
magnetically holding the lower injector housing in place up a portion of the pushrod;
inverting the body of the fuel injector assembly and placing the body on a front end of the frame constructed to fit the body;
fixing the body and the front end of the frame within the vice;
building up the internal components of the fuel injector upon the body forming a built-up body having a tip;
aligning the lower injector housing with the built-up body using the push rod;
decoupling the lower injector housing from at least one magnet coupled to the lower injector housing;
mating the lower injector housing with the built-up body by sliding the lower injector housing down the push rod and having the tip of the built-up body protruding through a center of the body;
actuating the trigger to apply pressure to the tip to compress springs within the fuel injector and maintain internal alignment of fuel injector components; and
rotating the lower injector housing on threads of the body to fix the lower injector housing to the built-up body to form a fuel injector sub-assembly.

### Claim 16 (depends on 15)

The method of claim 15, further comprising releasing the push rod from the tip protruding from a center of the lower injector housing.

### Claim 17 (depends on 16)

The method of claim 16, further comprising inverting the fuel injector subassembly and fixing the fuel injector subassembly within a vice.

### Claim 18 (depends on 17)

The method of claim 17, wherein fixing the fuel injector subassembly within the vice comprises fixing the fuel injector subassembly within an injector holder comprising two alignment plates spring biased in opposing directions and constructed to fit within the vice, wherein each alignment plate includes a guide pin arranged to maintain placement a lower injector housing of the injector.

### Claim 19 (depends on 18)

The method of claim 18, further comprising at least one magnet embedded within at least one of the two alignment plates and at least one detent on at least one of the two alignment plates to maintain the fuel injector subassembly in place during further assembly.

### Claim 20 (depends on 15)

The method of claim 15, further comprising removing an upper portion of the fuel injector assembly from the body during disassembly and further comprising mating the upper portion of the fuel injector assembly with the body during reassembly.