Coating film peeling nut

{
  "publication_number": "US11719273B2",
  "country": "US",
  "kind": "B2",
  "title": "Coating film peeling nut",
  "abstract": "The coating film peeling nut of the present invention has a notch 13 formed in an inner surface of a nut main body 10 on which a female screw 12 is formed, the notch 13 extending in a direction different from that of a lead angle of the female screw 12. The notch 13 is formed helically, and a winding direction thereof is the same as that of the female screw 12. A pitch of the notch 13 is 2 to 10 times a pitch of the female screw 12, and a depth of the notch 13 is 20 to 80% of a thread height of the female screw 12.",
  "claims": [
    "1. A coating film peeling nut comprising a notch formed in an inner surface of a nut main body on which a female screw is formed, the notch extending in a direction different from that of a lead angle of the female screw, wherein the notch is formed helically, and a winding direction thereof is the same as that of the female screw.",
    "2. The coating film peeling nut according to claim 1, wherein a pitch of the helically formed notch is 2 to 10 times a pitch of the female screw, and a depth of the notch is 20 to 80% of a thread height of the female screw.",
    "3. The coating film peeling nut according to claim 1, wherein a lead angle of the notch is larger than the lead angle of the female screw.",
    "4. The coating film peeling nut according to claim 1, wherein a lower end of the notch reaches a bearing surface of the nut main body, and an upper end thereof reaches an upper end of the female screw."
  ],
  "description_excerpt": "The present invention relates to a coating film peeling nut which can be tightened while peeling a coating film adhering to a male screw component, and particularly to a coating film peeling nut suitable for use, for example, in undercarriages of automobiles.\n\nIn order to improve the rust prevention performance of automobiles, the coating of automobile components is thickened, and, at the same time, the coating of male screw components such as bolts welded to the automobile components is similarly thickened. However, even if it is attempted to screw a nut onto a male screw component having a thick coating film adhering thereto, the coating film serves as a resistance so that the nut cannot be properly tightened.\n\nTherefore, conventionally, a masking tape is applied to a male screw component before coating to prevent adhesion of a coating film, or a nut with a cap is attached to a male screw component to prevent adhesion of a coating film. In the case of electrode-position coating, an insulating film is formed in advance on a threaded portion of a male screw component. However, these methods require an operation of removing a masking tape or the like after the coating has been performed or peeling off the coating together with the insulating film, which lowers the productivity.\n\nMoreover, in view of the fastening structure, a male screw component needs to be fixed to a mating material to be coated by welding or the like. In such a structure, it is often difficult to weld the male screw component after coating.",
  "cpc": [
    "F16B 33/02",
    "C09D 5/00",
    "F16B 37/00"
  ],
  "ipc": [
    "F16B 33/02",
    "F16B 37/00"
  ],
  "assignees": [
    "Aoyama Seisakusho Co Ltd"
  ],
  "inventors": [
    "Yuichi HIROI",
    "Akihiro Furukawa",
    "Yukinori Fujimoto"
  ],
  "filing_date": "2020-10-30",
  "publication_date": "2023-08-08",
  "grant_date": "2023-08-08",
  "priority_date": "2018-07-19",
  "application_number": "US-202017085199-A",
  "family_id": "66999888",
  "cited_by_count": 0,
  "citations": [
    "US1116241A",
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    "JPS5979613U",
    "US5139380A",
    "JPH0547522U",
    "DE19505227C1",
    "US6406238B2",
    "US20120014764A1",
    "JP2014101990A",
    "EP2924303A1",
    "US20150308483A1",
    "US20170219001A1"
  ]
}