The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 1992
Filed:
Jul. 11, 1991
R M Muller, Frankfurt, DE;
Multifastener Corporation, Detroit, MI (US);
Abstract
An improved die member and method of attaching a self-piercing and riveting fastener to a panel wherein a slug pierced from the panel by the riveting fastener is securely staked in the barrel portion of the fastener during the installation of the fastener. The staking method includes driving a plurality of staking projections into said slug, thereby pinching said slug between the projections and a barrel side wall. This pinching action causes the slug to deform outwardly and lodge between the side walls of said fastener. The staking projections are preferably arranged around the perimeter of the die post, and in a most preferred embodiment, the projections have a canted side wall proximal the wall, forcing a portion of said slug toward the barrel side wall, when said slug is pinched between said canted side wall and a bottom wall of said fastener.