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:
Aug. 16, 1977
Filed:
Aug. 24, 1976
Daniel Joseph Herkes, Aurora, IL (US);
Ernest William Reinwall, Jr, McHenry, IL (US);
Illinois Tool Works Inc., Chicago, IL (US);
Abstract
A threaded fastener unit and driver system for maximizing driving force distribution, the fastener unit having a composite head section comprised of a thin-walled uniform thickness plastic coating covering all surfaces of an enlarged head portion on a drilling or tapping device. The composite head includes internal torque transmitting surfaces formed by slots intersecting at generally right angles to one another forming four upstanding posts with a radially extending flange at the base of the posts. The fastener unit is configured so that the driving force distribution is maximized to eliminate damage to the plastic during installation of the fastener in a workiece.