Diameter expansion drill bit

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9573238
APP PUB NO 20150165583A1
SERIAL NO

14406775

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A diameter expansion drill bit used for inserting in a prepared hole perforated in a framework to expand a diameter of a portion of the prepared hole by grinding has a plurality of blade sections that grind the portion of the prepared hole, a blade holding section that holds the plurality of blade sections movably in a radial direction respectively, and a shank section that supports the blade holding section, and the plurality of blade sections move to spread outwardly in the radial direction with respect to the blade holding section by centrifugal force due to rotation.

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Patent Owner(s)

Patent OwnerAddress
FS TECHNICAL CORPORATIONTOKYO 125-0054

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujita, Shogo Tokyo, JP 18 23

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