Patent · US Expired

Spade drill bit

US7267513B2 · kind B2 · utility

21Cited by

4References

22Claims

0Family size

Assignee

Credo Technology Group Limited · US

Inventors

Juergen Wiker · Echterdingen, DE
Gregory A. Phillips · Crestwood, US

Key dates

Filing date	Mar 11, 2003
Grant date	Sep 11, 2007
Priority date	—
Expiry date	Mar 11, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/909
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

A spade drill bit (202) comprises a shaft (204) having one end (205) configured to be engaged to a driving tool and a cutting head (206) attached at an opposite end of said shaft (204). The cutting head (206) includes a center point (216) having threads (240) defined thereon, including continuous threads (247) adjacent the tip and discontinuous threads (242) thereafter toward the base.

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