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:
Nov. 03, 1987
Filed:
Jan. 25, 1984
Knut Guhring, Albstadt, DE;
Gottlieb Guhring, Ebingen, DE;
Abstract
A drill is described having a metal bit carrier part on which a sintered metal bit is placed. The bit possesses at least one enclosed helical cooling channel which continues in alignment into a corresponding cooling channel in the bit carrier part. This drill is particularly characterized by very great mechanical and thermal stability, which is not adversely affected in any way by the system of cooling channels in the interior of the drill, so that the service life and cutting power of the drill can be greatly increased. These advantages apply both to twist drills proper and to single-lipped deep-hole drills, for which there is the particular advantage that the geometry of the drill head can be optimally adapted to the particular material to be processed.