Patent · US Active

Drill and a production method for a drill

US9114462B2 · kind B2 · utility

0Cited by

2References

19Claims

0Family size

Assignee

Hilti Aktiengesellschaft · LI

Inventors

Arno Glaser · Schaanwald, LI
Steven Moseley · Bludenz, AT

Key dates

Filing date	Aug 31, 2012
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Oct 2, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T408/89
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A drill includes a drill bit, an intermediate part, and a shaft. The drill bit is made from a sintered carbon-containing hard metal. The intermediate part is made from steel and arranged along an axis between the drill bit and the shaft. An activity of carbon in the steel of the intermediate part is greater at a temperature ranging from 1100° C. to 1450° C. than an activity of carbon in the sintered hard metal at the temperature.

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