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:
Apr. 10, 2001
Filed:
Nov. 05, 1998
Mathias Fuss, Weingarten, DE;
Hawera Probst GmbH, Ravensburg, DE;
Abstract
A drilling tool, especially for the rotary percussion drilling of preferably rock, has a drilling body equipped toward the drilling side preferably with cutting bits, and with an axially arranged bore for receiving an exchangeable centering drill. In order to achieve axial movability and a reliable rotational takeup of the centering drill in the drilling tool, the drilling tool has a transverse bore which is arranged centrally relative to its drill longitudinal axis and into which can be inserted a bar-shaped or tubular holding means which centrally penetrates a corresponding recess on the shank of the centering drill so that the centering drill can be moved in the axial direction.