Invention Grant
- Patent Title: Drill bit
- Patent Title (中): 钻头
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Application No.: US13376376Application Date: 2010-06-08
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Publication No.: US08801344B2Publication Date: 2014-08-12
- Inventor: Ulrich Krenzer , Peter Marz
- Applicant: Ulrich Krenzer , Peter Marz
- Applicant Address: DE Aalen
- Assignee: MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG
- Current Assignee: MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG
- Current Assignee Address: DE Aalen
- Agency: Kilpatrick Townsend & Stockton LLP
- Priority: DE102009025223 20090608
- International Application: PCT/EP2010/003417 WO 20100608
- International Announcement: WO2010/142411 WO 20101216
- Main IPC: B23B51/02
- IPC: B23B51/02

Abstract:
The invention proposes a drill bit (1) leaving at least one main cutting edge (3, 3′) and at least one center cutting edge (15, 15′), wherein the drill bit (1) comprises a longitudinal axis (13), and wherein the at least one main cutting edge (3, 3′) and the at least one center cutting edge (15, 15′) are each assigned a rake face (7, 7′, 11, 11′). The drill bit (1) is characterized in that the rake face (11, 11′) assigned to the at least one center cutting edge (15, 15′) has at least two part faces (19, 19′; 21, 21′) which—as seen as perpendicular to the longitudinal axis (13) of the drill bit (1)—form an obtuse angle with one another, so that the at least one center cutting edge (15, 15′) comprises at least two part cutting edges (23, 23′; 25, 25′).
Public/Granted literature
- US20120076597A1 DRILL BIT Public/Granted day:2012-03-29
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