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:
Jul. 17, 1990
Filed:
May. 23, 1989
Applicant:
Inventors:
Dieter Soehnlein, Kaufering, DE;
Dieter Wirths, Landsberg am Lech, DE;
Anton Knoller, Landsberg am Lech, DE;
Peter Kunert, Kaufering, DE;
Assignee:
Hilti Aktiengesellschaft, Furstentum, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21K / ;
U.S. Cl.
CPC ...
72189 ; 72406 ;
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.