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:
Sep. 30, 2014
Filed:
Jun. 20, 2009
Ulrich Krenzer, Zirndorf, DE;
Ulrich Krenzer, Zirndorf, DE;
Abstract
A drill bit, has a front side () and a circumferential surface () adjoining the front side (). The front side () has a main cutting edge () including a transverse cutting edge () extending through a center axis () of the drill bit (), and has two first and second main cutting-edge regions () adjoining the transverse cutting edge () and extending radially toward the circumferential surface (). The circumferential surface () comprises at least two chip flutes (), which between them delimit a first and a second web (), and three lands, of which a first land adjoins the end of the first main cutting-edge region () facing away from the transverse cutting edge (), and serves as a free cutting-edge land (), and additionally has a free cutting edge (), a second land adjoins the end of the second main cutting-edge region () facing away from the transverse cutting edge (), and serves as a guide land (), and a third land serves as a support land (). The drill bit is characterized in that the guide land () is disposed on the first web () and the support land () is disposed, together with the free cutting-edge land () having the free cutting edge (), on the second web ().