The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2007
Filed:
Jan. 20, 2004
Applicants:
Ryoichi Otaki, Kanagawa, JP;
Koji Hashimoto, Kanagawa, JP;
Inventors:
Ryoichi Otaki, Kanagawa, JP;
Koji Hashimoto, Kanagawa, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02K 7/10 (2006.01); H02K 7/116 (2006.01); F16D 65/18 (2006.01); F16H 25/20 (2006.01);
U.S. Cl.
CPC ...
Abstract
An actuator has an electric motor, a screw shaft connected to a rotational shaft of the electric motor in such a manner as to be capable of transmitting power, a nut member disposed on peripherally of the screw shaft and connected to the rotational shaft of the electric motor in such a manner as to be capable of transmitting the power and a ball rolling within a spiral groove formed between the screw shaft and the nut member, characterized in that the rotational speed of the screw shaft and the rotational speed of the nut member are different.