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:
Dec. 03, 2013
Filed:
Feb. 21, 2008
Sven Matthiesen, Lindau, DE;
Peter Hertlein, Ruggell, LI;
Michael Baumgartner, Montlingen, CH;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A chipless thread-forming screw () has a thread-carrying shank () provided at its opposite ends with a tip () and a head (), respectively, and having a diameter between 0.25 and 0.35 mm, with the shank () having at least one frustroconical section () extending from the tip () in direction of the head () and having, with respect to the thread root (), a point angle (α) between 200 and 300, and a cylindrical section () extending between the frustroconical section () and the head (), and with a starting line () of the thread () remote from the head () being spaced from the tip () by a distance (L) from 0 to 0.3 mm.