Drill and a production method for a drill

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United States of America Patent

PATENT NO 9114462
APP PUB NO 20130089384A1
SERIAL NO

13601089

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Abstract

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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.

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Patent Owner(s)

  • HILTI AKTIENGESELLSCHAFT

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Glaser, Arno Schaanwald, LI 4 7
Moseley, Steven Nenzing-Gurtis, AT 14 74

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