Fuel injection hold down bolt repair kit

{
  "publication_number": "US10227960B2",
  "country": "US",
  "kind": "B2",
  "title": "Fuel injection hold down bolt repair kit",
  "abstract": "An improved apparatus for repairing fuel injector hold-down bolt holes is disclosed. The apparatus can be readily mounted to the passage through which the fuel injector passes via a flange that fits inside the passage and thus generally avoids the need to remove the engine in order to conduct the repairs. The apparatus further provides guides or bushings that allow for the precise alignment of various tools to repair the hold-down bolt hole.",
  "claims": [
    "1. An apparatus for repairing a fuel injector, comprising: a plate with a top surface and a bottom surface; an arbor channel located in the plate; a flange that protrudes from the bottom surface of the plate about the arbor channel and that has a flange radius; a repair guide located in the plate that extends from the top surface through the bottom surface and that has an effective radius, wherein the center of the repair guide is separated from the center of the arbor channel by a distance greater than the sum of the flange radius and the effective radius; and an arbor extending through the flange and the arbor channel.",
    "2. The apparatus of claim 1, wherein the plate is generally in the shape of an ovoid cylinder.",
    "3. The apparatus of claim 1, wherein the flange contains a plurality of slots.",
    "4. The apparatus of claim 1, wherein the arbor is comprised of a threaded end and a frustoconical end.",
    "5. The apparatus of claim 4, further comprising a nut attached to the threaded end of the arbor.",
    "6. The apparatus of claim 4, wherein the frustoconical end has a slant angle between 55° and 65°.",
    "7. The apparatus of claim 1, wherein the repair guide is threaded.",
    "8. The apparatus of claim 1, further comprising a bushing configured to fit inside the repair guide.",
    "9. The apparatus of claim 8, wherein the bushing is generally cylindrical in shape.",
    "10. The apparatus of claim 8, wherein the bushing is generally rectangular in shape.",
    "11. The apparatus of claim 8, further comprising a pin extending from the top surface that connects to the bushing when the bushing is in the repair guide.",
    "12. The apparatus of claim 1, further comprising an alignment guide separate and distinct from the repair guide.",
    "13. The apparatus of claim 12, wherein the plate has a side and the alignment guide is located along the side.",
    "14. The apparatus of claim 13, wherein the alignment guide is comprised of a semi-circular channel.",
    "15. The apparatus of claim 1, wherein the plate has two sides and further comprising an alignment guide along each side.",
    "16. A method for repairing a fuel injector hold-down bolt hole, comprising: removing a fuel injector from an engine; placing an apparatus comprised of a plate with a top surface and a bottom surface; an arbor channel located in the plate; a flange that protrudes from the bottom surface of the plate about the arbor channel and that has a flange radius; a repair guide located in the plate that extends from the top surface through the bottom surface and that has an effective radius, wherein the center of the repair guide is separated from the center of the arbor channel by a distance greater than the sum of the flange radius and the effective radius; and an arbor extending through the flange and the arbor channel into a fuel injector passage in the engine by placing the flange in the fuel injector passage; aligning the apparatus so that the repair guide is aligned with the fuel injector hold-down bolt hole in the engine; securing the apparatus into the fuel injector passage; inserting a repair tool through the repair guide; repairing the fuel injector hold-down bolt hole with the repair tool; and removing the apparatus after repairing the fuel injector hold-down bolt hole.",
    "17. The method of claim 16, wherein the apparatus is further comprised of a nut screwed onto the arbor; and the step of securing the apparatus into the fuel injector passage is further comprised of rotating the nut.",
    "18. The method of claim 16, wherein the apparatus is further comprised of a bushing inserted into the repair guide; and the step of inserting the repair tool through the repair guide is further comprised of inserting the repair tool through the bushing in the repair guide.",
    "19. The method of claim 16, wherein the apparatus further consists of the plate having a side and an alignment guide located in the side; and the step of aligning the apparatus is further comprised of using the alignment guide to align the apparatus."
  ],
  "description_excerpt": "This application claims the benefit of U.S. Provisional Patent Application No. 62/461,964, filed on Feb. 22, 2017, the contents of which are hereby incorporated herein by reference.\n\nThe present invention generally relates to an apparatus for repairing or restoring a cylinder head fuel injector hold-down bolt hole that secures a fuel injector retaining bolt or fastener in an engine.\n\nModern gas and diesel internal combustion engines require precise control of fuel delivery to a combustion chamber in order to operate at peak performance (such as optimal efficiency, power, reliability, etc.). This fuel control is typically accomplished via a fuel injector, which provides a mechanism for reliably and accurately injecting fuel into the combustion chamber of an internal combustion engine, such as one found in automotive and truck engines. Fuel injectors require frequent service to operate efficiently in dispersing precise amounts of fuel into the combustion chamber. The life cycle of the fuel injector depends on the ability to provide consistent fuel pressure and cylinder head pressure to deliver fuel at incremental moments as determined by the engine's controls and requirements.\n\nFuel injectors are typically mounted onto an engine by a retaining assembly and are positioned such that the injector can deliver fuel directly into the combustion chamber. The retaining assembly typically consists of a small steel dual fork-like object that straddles the fuel injector and is secured via an injector hold-down bolt that passes through the valve cover and into the cylinder head.",
  "cpc": [
    "F02M 61/168",
    "F02M 2200/8023",
    "F02M 2200/8076",
    "F02M 2200/8092",
    "F02M 2200/85",
    "F02M 61/14",
    "F16B 13/065",
    "F16B 33/002",
    "F16B 39/04"
  ],
  "ipc": [
    "F02M 61/14",
    "F02M 61/16",
    "F16B 13/06",
    "F16B 33/00",
    "F16B 39/04"
  ],
  "inventors": [
    "Jeffrey Del Rossa"
  ],
  "filing_date": "2018-02-22",
  "publication_date": "2019-03-12",
  "grant_date": "2019-03-12",
  "priority_date": "2017-02-22",
  "application_number": "US-201815902748-A",
  "family_id": "63167668",
  "cited_by_count": 2,
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  ]
}