Patent · US Expired

Tool bits and method of shaping

US4941339A · kind A · utility

1Cited by

3References

6Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Dieter Soehnlein · Kaufering, DE
Dieter Wirths · Landsberg am Lech, DE
Anton Knoller · Landsberg, DE
Peter Kunert · Laufenbürg, DE

Key dates

Filing date	May 23, 1989
Grant date	Jul 17, 1990
Priority date	—
Expiry date	May 23, 2009

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB21H7/18
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

Grooves are formed in an insertion end of a working tool, such as a tool bit or a chisel bit by pivoting a grooving tool about a pivot axis extending perpendicularly to the axis of the insertion end. By pivoting the grooving tool about the pivot axis, it moves along the axial direction of the insertion end forming the grooves. A plurality of the grooving tools can be ganged together and moved by a single drive unit for simultaneously forming angularly spaced grooves in the insertion end.

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