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:
May. 19, 2015
Filed:
Dec. 12, 2008
Helmut Glimpel, Lauf a. d. Pegnitz, DE;
Thomas H. Berschneider, Weigendorf, DE;
Dietmar G. Hechtle, Pegnitz, DE;
Thomas A. Zeus, Hersbruck, DE;
Helmut Glimpel, Lauf a. d. Pegnitz, DE;
Thomas H. Berschneider, Weigendorf, DE;
Dietmar G. Hechtle, Pegnitz, DE;
Thomas A. Zeus, Hersbruck, DE;
EMUGE-WERK RICHARD GLIMPEL GMBH & CO. KG, FABRIK FÜR PRÄZISIONSWERKZEUGE, Lauf a.d. Pegnitz, DE;
Abstract
This invention relates to a screw tap which is rotatable about a rotational axis and has a number of thread-cutting teeth, which respectively have a radially outer tip cutter and are disposed mutually offset, with a predefined thread pitch, in an arrangement running spirally or helically around the rotational axis. In a lead region adjoining one end of the screw tap axially to the rotational axis, the maximum radial distance of the tip cutters of the thread-cutting teeth from the rotational axis increases with increasing axial distance of the tip cutters from one end of the screw tap according to a predefined radial distance function. At least some of the thread-cutting teeth in the lead region, at least in the region of the tip cutters, respectively have a defined cutter rounding between tool face and tool flank.