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Injectable nut cap

  • US 9,416,811 B2
  • Filed: 05/09/2014
  • Issued: 08/16/2016
  • Est. Priority Date: 05/16/2013
  • Status: Active Grant
First Claim
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1. A method of forming a seal around an end of a fastener protruding from a structure, a cap comprising a cap body with a cavity;

  • a sealing material inlet comprising an opening in the cap body;

    three or more ridges protruding from the cap body into the cavity; and

    three or more channels between the ridges, the method comprising;

    installing the cap body over the end of the fastener so that it is enclosed within the cavity and contacted by the ridges;

    injecting sealing material into the cavity via the sealing material inlet so that the sealing material flows along the channels, fills the cavity, contacts the end of the fastener, and contacts the structure; and

    curing the sealing material to form the seal;

    wherein the cap body and the cavity terminate at an annular rim;

    the cap body is installed over the end of the fastener with an annular gap between the annular rim and the structure; and

    the sealing material flows from the sealing material inlet to the annular rim and out of the annular gap to form an annular bead in contact with the structure.

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