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:
Jan. 01, 2013
Filed:
May. 16, 2007
Sven Matthiesen, Lindau, DE;
Frank Rieger, Zellerberg, DE;
Peter Hertlein, Gams, CH;
Michael Baumgartner, Kriessern, CH;
Peter Mugg, Nueziders, AT;
Matthias Schaefer, Coburg, DE;
Sven Matthiesen, Lindau, DE;
Frank Rieger, Zellerberg, DE;
Peter Hertlein, Gams, CH;
Michael Baumgartner, Kriessern, CH;
Peter Mugg, Nueziders, AT;
Matthias Schaefer, Coburg, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A chiplessly thread-forming screw has a stem () at one end of which a tip () is provided and at another end of which a head () is provided, and which has a pointed conical section () extending from the tip () in a direction of the head (), a cylindrical section () arranged between the first pointed section () and the head (), a first cambered section () adjoining the pointed conical section () in the direction of the head, and a second cambered section () arranged between the first cambered section () and the cylindrical section () and an outer surface () of which has a second curvature radius (R) unequal to the first curvature radius (R) of the outer surface () of the first cambered section ().