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:
Jul. 16, 2019
Filed:
Dec. 18, 2015
Applicant:
Nabtesco Corporation, Tokyo, JP;
Inventors:
Koji Ito, Gifu-ken, JP;
Atsushi Fukui, Gifu-ken, JP;
Assignee:
NABTESCO CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 21/08 (2006.01); F01C 9/00 (2006.01); F01C 21/02 (2006.01); F04C 15/00 (2006.01); F15B 15/12 (2006.01);
U.S. Cl.
CPC ...
F01C 9/002 (2013.01); F01C 21/02 (2013.01); F01C 21/08 (2013.01); F04C 15/0076 (2013.01); F15B 15/125 (2013.01);
Abstract
A rotary actuator includes an output shaft, a housing, a piston, and a friction reducer. The housing includes an arcuate bore that extends around the output shaft. The piston is coupled to the output shaft and moved in the arcuate bore. Pressure fluid acts to move the piston. The friction reducer is configured to reduce friction between a peripheral surface of the piston and an inner circumferential surface of the housing forming the arcuate bore.