Patent · US Active

Drill bit and cutting head for drill bit

US9284787B2 · kind B2 · utility

0Cited by

62References

20Claims

0Family size

Assignee

BLACK & DECKER INC. · US

Inventors

Andreas Hammer · Regensburg, DE
Steve Brocket · Durham, GB
Christoph Gastinger · Hutthurm, DE
Christian Bluemel · Waldkirchen, DE

Key dates

Filing date	May 24, 2013
Grant date	Mar 15, 2016
Priority date	—
Expiry date	Aug 7, 2034

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB23B2251/44
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A cutting head for a drill bit comprises four substantially identically shaped cutting arms extending radially from a common central axial point, each cutting arm comprising a cutting edge extending, outwardly and axially backwards from the common central axial point. The cutting edges are equianguiarly spaced apart from each other about the central axis of the cutting head. Each cutting, arm further comprises a side chamfer extending between its radially outer face and its rotationally trailing side face.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.