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:
Jan. 25, 2022
Filed:
Oct. 02, 2018
Jacob Lach Gmbh & Co. KG, Hanau, DE;
Horst Lach, Hanau, DE;
JAKOB LACH GMBH & CO. KG, Hanau, DE;
Abstract
The invention relates to a drilling tool (), in particular a dowel hole drill, for the machining of workpieces, in particular workpieces made of wood, plastics, composite materials, comprising a drill shaft () with a front surface (), and to a drill head () with at least one cutting edge (), which is firmly connected, such as soldered, to the drill shaft (). In order to make available a drilling tool of the type mentioned at the start, which has a broad range of application and is simple to produce, it is provided that the drill head () is formed from a composite material with exclusively two layers (), namely a hard metal layer () and an ultra-hard layer () which is connected to the hard metal layer () and preferably formed from polycrystalline diamond or polycrystalline boron nitride, that the ultra-hard layer () is connected directly to the front surface () of the drill shaft () and that the at least one cutting edge () is formed by the ultra-hard layer (), and a drill bit () such as a centering tip is formed by the hard metal layer ().