US Patent 7281445 Gear speed reducer

Patent 7281445 was granted and assigned to Keihin Corporation on October, 2007 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Keihin Corporation

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

72814450

Patent Inventor Names

Hideki Sasaki0

Date of Patent

October 16, 2007

Patent Application Number

112403280

Date Filed

September 30, 2005

Patent Primary Examiner

‌

Thomas R. Hannon

Patent abstract

When a rotational shaft of a gear speed reducer is rotated, a small-diameter gear of a first gear is held in mesh with first internal teeth of a fixed gear and a large-diameter gear of the first gear is held in mesh with second internal teeth of a second gear. The first gear and the second gear comprise cycloidal gears, respectively, and transmit rotational drive power to the second gear. The rotational drive power is output from an output shaft of the second gear. The gear speed reducer has a default mechanism for holding the output shaft at a predetermined angular position when an electric signal applied to an actuator is interrupted, and a self-lock function for preventing drive power applied from the output shaft from being transmitted to the actuator.