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:
Jun. 16, 1992
Filed:
Mar. 22, 1991
James Medal, Cape Coral, FL (US);
The Fastron Corporation, Franklin Park, IL (US);
Abstract
A threaded fastener is provided with a plastic head section that is interlocked with a metal head end of a metal body having an elongated shank with a thread thereon. The plastic head is polygonal with a higher concentration of a reinforcing filler material such as glass in the outer periphery of the polygon so that the plastic head can be turned with the usual wrenches at a normal turning torque without rounding off of the polygonal corners of the head. The inner section of the plastic head has a lesser concentration of filler material adjacent the juncture of plastic and the metal head end to provide greater ductility and strength resistance to fracture or separation of the plastic from the metal head end. The preferred fastener has a self-tapping, helical screw thread thereon and a plurality of metal washers for receiving and separating electrical conductors that will be attached to the fastener between adjacent washers. The edges of the washers are also coated with plastic having a lesser concentration of the filler material thereby providing greater ductility and more resistance to cracking or chipping of the plastic from the washer edges. The preferred plastic is nylon. A method of molding the plastic with the filler material in a plastics mold is disclosed.