Full-root-radius-threaded wing nut having increased wall thickness

  • US 10,557,576 B2
  • Filed: 06/14/2016
  • Issued: 02/11/2020
  • Est. Priority Date: 06/15/2015
  • Status: Active Grant
First Claim
Patent Images

1. A hammer union, the hammer union comprising:

  • a threaded female sub;

    a male sub;

    a plurality of retainer segments concentrically disposed about the male sub; and

    a threaded wing nut that is concentrically disposed about each of the threaded female sub, the male sub, and the plurality of retainer segments to couple the threaded female sub to the male sub;

    wherein the threaded wing nut comprises;

    a body having an axial length defined between first and second end surfaces, the body having an exterior surface extending between the first and second end surfaces;

    a passage axially extending through the body from the first end surface to the second end surface, wherein the passage defines an interior surface of the body;

    a first internal shoulder formed by the interior surface of the body that defines a portion of the passage;

    an internal threaded connection formed by the interior surface that extends from the first end surface and towards the first internal shoulder; and

    a plurality of circumferentially-spaced lugs extending radially from the exterior surface of the body;

    wherein the plurality of retainer segments is radially positioned between the male sub and the threaded wing nut such that the threaded wing nut is concentrically disposed about the male sub but the interior surface of the body of the wing nut is spaced radially from the male sub;

    wherein the body has a variable wall thickness defined between the interior surface of the body and the exterior surface of the body, with the variable wall thickness at the first internal shoulder being greater than the variable wall thickness at the first end surface;

    wherein the internal threaded connection includes a first slanted surface;

    a second opposing slanted surface; and

    a curved surface that extends from the first slanted surface and to the second opposing slanted surface; and

    wherein a first lug of the plurality of lugs extends along the entirety of the axial length of the body.

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