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:
Jul. 14, 2009
Filed:
May. 25, 2007
Olaf Koch, Kaufering, DE;
Olaf Koch, Kaufering, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A hard material head () for a rotary percussion drill bit () having an elongated shaft () including at least three cutting edges () distributed circumferentially within a circumscribing circle, a bottom surface () located opposite the cutting edges () and fastened by a material bond to an end () of the drill bit shaft () of the rotary percussion drill bit (), concave side surfaces () formed circumferentially between adjacent cutting edges (), and a peripheral pocket () opening toward the bottom surface () and formed, respectively, in at least two concave side surfaces () located opposite one another, and in which a corresponding axial pin () formed on a shaft end () is form-locking engageable.