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:
Nov. 22, 1994
Filed:
Dec. 10, 1993
Jack Rath, Los Angeles, CA (US);
Other;
Abstract
A prevailing torque fastener has a portion of the internal thread deformed from a circular cross-section to an approximately elliptical cross-section by a pair of die impressions on diametrically opposed sides of the exterior of the body. Each die impression is skewed from a plane normal to the axis of the fastener at an angle corresponding to the lead of the thread. Each die impression is made with a jaw having a central circular arc with a radius greater than the radius of the undeformed fastener. The opening between the jaws has a perimeter equal to the circumference of the undeformed fastener. Each edge of the die impression is at a predetermined elevation relative to the thread profile, preferably aligned with the crest of the thread. The location of the die impression is controlled by threading the fastener against a stop and crimping the fastener between jaws spaced a known distance from the stop.