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:
Feb. 08, 2011
Filed:
Jun. 09, 2005
Olaf Koch, Kaufering, DE;
Joachim Woerz, Landsberg, DE;
Karl-heinz Hofmann, Weil, DE;
Werner Britten, Saarbruecken, DE;
Olaf Koch, Kaufering, DE;
Joachim Woerz, Landsberg, DE;
Karl-Heinz Hofmann, Weil, DE;
Werner Britten, Saarbruecken, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A drill, which is used in a hammer drill for drilling holes in stone, concrete and the like, includes a one-piece drilling head () formed of a hard material and provided, at its first end (), with at least one main bit having a tip () and at least one cutting structure () integral to the one-piece drilling head (), and at a second end () located opposite the first end (), with a bottom surface () for the mounting the drilling head () on the drill stem (), and having a plurality of axially extending through-grooves () for removing drillings produced during a drilling process and having a cross-section which increases, at least regionwise, in a direction toward the bottom surface () of the drilling head ().