Round shaft chisel

United States of America Patent

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Feb 17, 2009
Grant Date
Jan 17, 2008
app pub date
Jun 19, 2007
filing date
Jun 23, 2006

priority date (Note)
Expired

status (Latency Note)

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Abstract

, improved dirt removal can be assured during operations. The improved rolling action results in reduced wear between the clamping sleeve and the chisel shaft, which has advantageous results regarding the service life.

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First Claim

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Patent Owner(s)

Patent Owner	Address
BETEK BERGBAU-UND HARTMETALLTECHNIK KARL-HEINZ SIMON GMBH & CO KG	SULGENERSTRASSE 21-34 D-78733 AICHHALDEN

International Classification(s)

E21C:MINING OR QUARRYING

[Classification Symbol]

[Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Holl, Bernd	Neustadt/Wied, DE	26	989

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Round shaft chisel

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United States of America Patent

11820491

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PATENT NO	7490912
APP PUB NO	20080012419A1
SERIAL NO	11820491
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
February 17, 2009	US,7490912,B2 US7490912B2	GRANTED PATENT AS SECOND PUBLICATION
January 17, 2008	US,20080012419,A1 US20080012419A1	FIRST PUBLISHED PATENT APPLICATION

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11820491

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