Patent · US Active

Drill bit

US7476067B2 · kind B2 · utility

26Cited by

23References

20Claims

0Family size

Assignee

KENNAMETAL INC. · US

Inventors

Bernhard Borschert · Bamberg, DE
Ulrich Krenzer · Zirndorf, DE
Rainer Büttner · Wilhermsdorf, DE

Key dates

Filing date	Jan 20, 2006
Grant date	Jan 13, 2009
Priority date	—
Expiry date	Dec 5, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/9097
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A drill bit having a shank portion and a cutting portion, which cutting portion generally has at least one cutting edge and a chip flute that has a helical portion. The drill bit has at least one straight coolant channel that has a coolant exit orifice disposed at least partially in the flute and oriented toward the cutting edges to supply coolant thereto to cool the cutting edges and chips produced during a cutting operation.

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