Patent · US Active

Screw tap and method for the production of a screw tap

US9033624B2 · kind B2 · utility

2Cited by

7References

19Claims

0Family size

Assignee

EMUGE-WERK RICHARD GLIMPEL GMBH & CO. KG FABRIK FUR PRAZISIONSWERKZEUGE · DE

Inventors

Helmut Glimpel · Achern, DE
Thomas Berschneider · Sulzbach-Rosenberg, DE
Dietmar Hechtle · Pegnitz, DE
Thomas Zeus · Hersbruck, DE

Key dates

Filing date	Dec 12, 2008
Grant date	May 19, 2015
Priority date	—
Expiry date	Oct 5, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/9048
WIPO fieldMachine tools
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.