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Polygonal driving means with inbuilt collar

  • US 10,378,574 B2
  • Filed: 07/01/2018
  • Issued: 08/13/2019
  • Est. Priority Date: 10/20/2008
  • Status: Active Grant
First Claim
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1. An assembly of a washer and a monolithic nut, wherein the monolithic nut comprises a polygonal shank with lateral sides and an inner wall on the polygonal shank having cylindrical threads along the inner wall of the polygonal shank, the monolithic nut having a frustoconical collar having a spherical lower portion and a bottom surface wherein the threads and the bottom surface are configured such that a threading movement of the nut along a mating threaded surface puts the spherical lower portion into contact with the washer, such that the contact places an axial load on the spherical lower portion of the collar, an upper-most collar surface opposite the bottom surface and a frustoconical curved surface between the bottom surface and the upper-most collar surface, wherein the frustoconical collar comprises a plurality of socket faces hollowed out from and relative to the frustoconical curved surface in an area between the bottom surface and the upper-most collar surface and wherein the socket faces extend to a plane defined by the respective polygonal shank lateral side, each lateral side of the polygonal shank being aligned with a respective hollowed-out socket face, and each lateral side of the polygonal shank terminates at a substantially transverse surface between the lateral side and a respective hollowed-out socket face at the intersection of the upper-most collar surface and the polygonal shank.

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