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. 11, 1983
Filed:
Oct. 26, 1981
Richard H Corrette, Cleveland, OH (US);
Colt Industries Operating Corp., Cleveland, OH (US);
Abstract
A cylindrical through-feed thread rolling die having a tapered lead-in portion, a cylindrical dwell portion, and a tapered exit portion is disclosed. Such die provides uniform spacing between the crests of the thread forms thereon throughout the lengths of the die. The spacing between the roots of the die is uniform except at the junction between the dwell portion and the two tapered end portions, where a larger spacing exists between the roots of adjacent thread forms. Because the crest spacing on the thread forms of the die is uniformly maintained throughout the length of the die, excessive pressures do not exist at the junction between the dwell portion and the two end tapers, and drunken threads on the workpiece being rolled are virtually eliminated.