Patent · US Expired

Drilling and/or chiseling tool

US7455129B2 · kind B2 · utility

9Cited by

10References

14Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rainer Widmann · Trochtelfingen, DE
Bernhard Moser · Altshausen, DE

Key dates

Filing date	Sep 23, 2004
Grant date	Nov 25, 2008
Priority date	—
Expiry date	Mar 23, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/9065
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A drilling and/or chiseling tool, in particular for machining materials such as concrete, rock, masonry, and the like, having a hard metal cutting element (1) contained in the machining end of the tool head, a radially outer, second working region (II) of the hard metal cutting element (1) being set back in relation to a central, first working region (I) of the hard metal cutting element (1) and the two working regions (I, II) transitioning into each other via a third working region (III). The third working region (III) is at least partially comprised of at least one partial circumference surface (5, 6) of at least one conical surface.

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