US Patent 7325624 Hammer drill having switching mechanism for switching operation modes

Patent 7325624 was granted and assigned to Hitachi on February, 2008 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Hitachi

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

73256240

Patent Inventor Names

Shingo Yamazaki0

Date of Patent

February 5, 2008

Patent Application Number

112851590

Date Filed

November 23, 2005

Patent Citations Received

‌

US Patent 11839963 Power tool including input control device on top portion of housing

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US Patent 11833652 Power tool

Patent Primary Examiner

Scott A Smith

Patent abstract

A switching mechanism switches on and off transmission of a striking force to a working tool, and switches on and off transmission of a rotational force to the working tool, thereby switching operation modes among at least a rotation and strike mode, a strike only mode, and a neutral mode. A rotation locking mechanism engages a cylinder during the strike only mode, thereby locking rotation of the cylinder. During the neutral mode, the transmission of the striking force, the transmission of the rotational force, and the locking of rotation of the cylinder are all turned off.

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