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:
Jan. 08, 1991
Filed:
Jan. 26, 1990
Francis C Peterson, Woodbury, CT (US);
Dennis Buss, Thomaston, CT (US);
Buell Industries, Inc., Waterbury, CT (US);
Abstract
A die (20) particularly adapted for making a screw blank having a reduced diameter, offset or asymmetric section has a first die section (30) having a central bore (32), which mates with a second die section (50) having a smaller diameter and/or offset bore (52). A shaped end (57) of the smaller or offset bore (52), which forms the reduced diameter, offset or asymmetric section of a screw blank, is coated with a hard lubricating material. The method of manufacturing the die (20) involves making two first die sections (30), which are preferably identical, from a first die body (130), and two second die sections (50), which are also preferably identical and adapted to mate with the first die section (30), from a second die body (150).