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:
Jun. 11, 2002
Filed:
Dec. 27, 2000
Uwe Christiansen, Gelnhausen, DE;
Henning Bierstedt, Friedersdorf, DE;
Hecaeus Quarzglas GmbH & Co. KG, Hanau, DE;
Abstract
The invention concerns a drilling device ( ) for brittle materials with a drill head ( ) detachably fixed to a drilling rod ( ) by means of a positive-lock connection for transmission of the drilling torque. For its exact relative positioning, the drill head ( ) has a conical shape ( ) which in the represented operating state engages centrally into a corresponding recess ( ) of the drilling rod ( ). As a protection against any axial loosening, a fixing device or arrest ( ) designed as a hollow nut is provided engaging into a thread ( ) of the drill head ( ) and into a thread ( ) of the drilling rod ( ), the threads ( ) having countercurrent pitches. By rotating the arrest ( ), the drill head ( ) and the drilling rod ( ) can thus be simply braced against each other or pulled away from each other, the connection enclosed by the arrest ( ) having optimum protection from external influences at the same time. Accordingly, the drilling device ( ) allows for drilling at high accuracy without excessive wear or complicated handling.