Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kigen Agehara0
Michio Yamashita0
Naohide Murakami0
Date of Patent
July 10, 2007
0Patent Application Number
105282340
Date Filed
September 8, 2003
0Patent Primary Examiner
Patent abstract
In a core bit formed with a boring blade at a front end thereof and integrally formed with a mounting portion, at a rear end portion thereof, formed with a guide portion in a cylindrical shape mounted to a chuck portion formed at a concrete drill, a ring-like seal member forming a seal between the mounting portion and a side of the chuck portion is formed at the guide portion in the cylindrical shape of the core bit.
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