US Patent 9364906 Power tool with high-speed electric motor

Patent 9364906 was granted and assigned to Makita on June, 2016 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Patent Applicant

Makita

Current Assignee

Makita

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

9364906

Date of Patent

June 14, 2016

Patent Application Number

14155358

Date Filed

January 15, 2014

Patent Primary Examiner

‌

David S Luo

Patent abstract

A hand-held power tool includes a motor having a stator and a rotor, the motor being configured to rotate the rotor at a speed of at least 40,000 rpm, an output shaft directly driven by the rotor, a tool accessory shaft configured to support a tool accessory, and a two-stage speed reducing transmission operably connecting the output shaft to the tool accessory shaft. The two-stage speed reducing transmission is configured to drive the tool accessory shaft at a rate less than the rotor speed, for example, at a rate less than or equal to 37.5% of the rotor speed.