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. 25, 1983
Filed:
Aug. 12, 1981
Terry D Capuano, Hinckley, OH (US);
Russell Burdsall & Ward Corporation, Mentor, OH (US);
Abstract
The present invention provides an improved method of forming improved dies for rolling an article, such as a lock thread convolution. The dies are formed by rolling a circular hob along a flank of a thread form ridge on the die. As the hob is rolled along the thread form ridge, teeth on the hob are pressed against the thread form ridge with a constant force to form uniform indentations and/or projections in the thread form ridge. The indentations and/or projections which are formed in the thread form ridge by the hob all have the same configuration since the hob is pressed against the thread form ridge with a force of a constant magnitude as the hob is rolled along the thread form ridge. During the rolling of an external thread convolution on a bolt blank with the improved die, the indentation and/or projections on the thread form ridge shape teeth on the flank of an external thread convolution on the bolt. Since the indentations and/or projections were originally rolled into the thread formed ridges on the die with a circular hob and since the indentations and/or projections on the die roll teeth on a circular bolt blank, the teeth formed on the flank of the external thread convolution have the same configuration as the teeth on the hob.