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:
Oct. 15, 1985
Filed:
Jul. 21, 1983
Horace D Holmes, Farmington Hills, MI (US);
Other;
Abstract
A self-locking fastener includes a male member, such as a bolt, having a standard, helical, male thread of constant diameter which is deformed by the special female locking threads of a female member, such as a nut. The female threads are defined by leading and trailing flanks which converge to provide a truncated root that frictionally engages and deforms a portion of the male crest. The trailing flanks of the male and female threads are inclined at the same angle and frictionally engage each other throughout their entire depth. The leading flanks of the male and female threads diverge away from each other to provide a space adjacent the truncated female root for receiving the deformed portion of the male crest therewithin. The deformed portion of the male crest and the full engagement of the trailing flanks produces firm metal-to-metal contact between the members throughout the entire length of the female thread, thereby procluding lateral movement of one member relative to the other. A tapping tool having a male thread which is the mirror image of the female thread to be formed is employed to produce the thread form in the female member.