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:
Sep. 24, 1985
Filed:
Feb. 17, 1984
Terry D Capuano, Hinckley, OH (US);
Russell, Burdsall & Ward Corporation, Mentor, OH (US);
Abstract
An improved fastener has a head section and an axially extending shank section. A thread convolution is disposed in a coaxial relationship with the head and shank sections. An improved holding action against rotational and axial movement of the fastener relative to a metal base member is promoted by a plurality of radially extending wedge-shaped compression ramps. The compression ramps are disposed on the head section and slope radially and axially inwardly toward the shank section. The compression ramps are effective to force metal of the base member into an annular groove which circumscribes and undercuts at least a portion of the shank section. The metal which is received in the undercut portion of the groove is effective to hold the fastener against being pushed or pulled axially outwardly from the base member. The compression ramps also force the metal of the base member radially inwardly against corners formed on the shank section of the fastener to hold the fastener against rotation. In addition, the compression ramps are embedded in the base member to further hold the fastener against rotation relative to the base member. The compression ramps are separated by flat arcuate stop surface areas which limit the extent to which the fastener is pressed into the base member.