US 9,261,126 B2 · Rivet bolt in combination with an attachment and process for making same

Abstract

A rivet bolt in combination with an attachment wherein the rivet bolt includes: a flange having a top surface and a bottom surface, and, a shaft having a threaded portion. An upper cylindrical portion of the rivet bolt includes an upper edge and an interior base surface having a drive head socket. The attachment receives the rivet bolt and comprises: a top surface, a bottom surface, a cylindrical bore therethrough, and an inverted frusto-conical surface extending from the top surface to the cylindrical bore. The upper cylindrical portion of the rivet bolt is deformed and rotatably and slidingly engages the inverted frusto-conical surface extending from the top surface of the attachment to the cylindrical bore therethrough. The upper cylindrical portion of the rivet bolt resides partially within the cylindrical bore. A process for making a rivet bolt in combination with an attachment is disclosed.

Claims24

Dependent claims

A rivet bolt in combination with an attachment, comprising:

said rivet bolt comprising:
a flange;
said flange includes a top surface and a bottom surface:
an upper cylindrical portion;
a first fillet between said upper cylindrical portion and said flange;
a shaft;
a second fillet between said shaft and said flange;
said shaft includes a threaded portion;
said upper cylindrical portion includes an upper edge;
said upper cylindrical portion includes an interior base surface;
an inverted frusto-conical surface extending from said upper edge of said cylindrical upper portion to interior base surface;
said attachment comprising:
a top surface and a bottom surface;
a cylindrical bore therethrough;
an inverted frusto-conical surface extending from said top surface of said attachment to said cylindrical bore through said attachment;
said top surface of said flange of said rivet bolt engages said bottom surface of said attachment;
and,
said upper cylindrical portion of said rivet bolt resides partially within said cylindrical bore of said attachment.

15 more elements

A process for making a rivet bolt in combination with an attachment, comprising the steps of:

positioning an attachment, said attachment having a cylindrical bore therethrough and said attachment having an inverted frusto-conical surface extending from a top surface of said attachment to said cylindrical bore of said attachment, in alignment with axis, A, of said rivet bolt, said rivet bolt having an upper cylindrical portion;
positioning a support block in alignment with axis, A, of said rivet bolt;
inserting said upper cylindrical portion of said rivet bolt into and through said cylindrical bore of said attachment;
forcefully engaging the top of the flange of said rivet bolt with the bottom surface of said attachment;
inserting the threaded portion of the shaft of said rivet bolt and the unthreaded portion of the shaft of said rivet bolt in a bore of said support block aligned with said axis A;
forcefully engaging the top surface of said block into engagement with the bottom surface of the flange of said rivet bolt;
deforming, using a punch operating along the axis A, the inverted frusto-conical surface of said rivet bolt extending from the upper edge of said cylindrical upper portion to the interior base surface, such that said cylindrical upper portion of said rivet bolt is reciprocally shaped with respect to said inverted frusto-conical surface of said attachment;
and,
removing said threaded portion of said shaft of said rivet bolt and said unthreaded portion of said shaft of said rivet bolt from said bore of said support block allowing said rivet bolt to slidingly engage said inverted frusto-conical surface extending from said top surface of said attachment to said cylindrical bore through said attachment.

6 more elements

Dependencies are inferred from the claim text.

Rivet bolt in combination with an attachment and process for making same

Life of this patent

Rivet bolt in combination with an attachment and process for making same

Life of this patent

Abstract

Claims24