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:
Mar. 02, 1993
Filed:
Oct. 21, 1991
Alicia Wieder, Willowbrook, IL (US);
Ralph D Tenuta, Mt. Prospect, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A self-drilling anchor for insertion into a workpiece such as a drywall to secure an element to the workpiece comprises a drilling portion having substantially parallelo-gram configured blade means for drilling a bore of pre-determined diameter into the workpiece, and a threaded portion including a generally cylindrical body of a diameter substantially the same as the diameter of the bore. The body has thread means for tapping into the bore to secure the anchor in the workpiece. The body also has a section having portions comprising a tapered portion of the threaded body portion and rearwardly inclined portions of the blade means of substantially less diameter or lateral extent than the diameter of the bore joining the drilling and threaded portions. The section receives particulate dislodged from the workpiece by the drilling of the bore, thereby preventing accumulation of particulate impeding insertion of the anchor.