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US 6,745,883 B2Granted
Electric power tool
AssigneeHitachi Koki Co., Ltd.
InventorsYasuo Eto, Hideki Kurosawa, Yoshiaki Adachi, Kenichi Takaada
Life of this patent
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Abstract
In an electric power tool having a clutch ring for adjusting a fastening torque, an outer member 3 which are lower in hardness than a base member 2 of the clutch ring 1 has a plurality of projections discontinuously arranged on the outer peripheral face of the base member 2.
Claims7
An electric power tool, comprising:
- a clutch ring for adjusting a fastening torque;
- and
- an outer member having a plurality of projections discontinuously arranged on an outer peripheral face of a base member of said clutch ring, said outer member being lower in hardness than said base member.
Dependencies are inferred from the claim text.