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:
Feb. 02, 1993
Filed:
May. 12, 1992
Gerald D Barth, South Elgin, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A torque-absorbing rotary threaded fastener for joining metal panels has a stripping torque sufficiently in excess of its driving torque to ensure that it will be relatively unlikely to be stripped when mechanically driven home. The fastener has a clamping face which includes a number of polyhedral nibs extending axially therefrom and separated from one another by substantially planar uninterrupted portions of the clamping face. The nibs include a leading wall and a trailing wall, facing in the direction of tightening and opposite thereto, respectively. The leading wall may be inclined at a steeper angle with respect to the plane of the clamping face than is the trailing wall, or vice versa. The leading wall and the trailing wall meet to form an apex which is also inclined with respect to the plane of the clamping face, so that the nibs increase in axial height as one views outward toward the periphery of the clamping face.