Patent · US Active

Drilling tool having point thinning

US8858134B2 · kind B2 · utility

6Cited by

4References

22Claims

0Family size

Assignee

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

Inventors

Helmut Glimpel · Achern, DE
Bernhard Borschert · Bamberg, DE

Key dates

Filing date	Jan 14, 2009
Grant date	Oct 14, 2014
Priority date	—
Expiry date	Nov 15, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/9097
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A rotatable drilling tool has cutting edges (on a face side) that merge inwardly into a chisel edge, with the chisel edge(s) running on the face side about a central region surrounding the tool axis, with the chisel edges forming, in the innermost region (or about a point thinning region), a residual chisel edge, with cutting edge corners being formed at the outer ends of the main cutting edges, with a straight connecting line that runs through two cutting edge corners of main cutting edges situated opposite one another in relation to the tool axis, or if an opposite main cutting edge is not present, through a cutting edge corner and the tool axis, with the chisel edge inner region running from the outer end of the residual chisel edge within a region with an angle of between −15° and +15° in relation to a parallel to the connecting line.

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