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:
Jan. 07, 2020
Filed:
Dec. 11, 2016
Applicant:
Bell Helicopter Textron, Inc., Fort Worth, TX (US);
Inventor:
Ryan Thomas Ehinger, Southlake, TX (US);
Assignee:
Textron Innovations Inc., Providence, RI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C 27/14 (2006.01); F16H 57/021 (2012.01); F16H 57/00 (2012.01); F16C 19/26 (2006.01); F16C 33/30 (2006.01); F16H 57/02 (2012.01); F16C 35/063 (2006.01);
U.S. Cl.
CPC ...
B64C 27/14 (2013.01); F16C 19/26 (2013.01); F16C 33/30 (2013.01); F16H 57/0018 (2013.01); F16H 57/021 (2013.01); F16C 35/063 (2013.01); F16C 2206/00 (2013.01); F16C 2361/61 (2013.01); F16H 2057/02043 (2013.01); Y10S 384/907 (2013.01); Y10S 384/9071 (2013.01); Y10S 464/902 (2013.01);
Abstract
A gear shaft allows a ceramic bearing to be used in environments where gear steel is desirable for driving a gear. The gear shaft includes a gear region and a bearing region. A bearing can be disposed about the bearing region of the gear shaft. A gear can be disposed about the gear region of the gear shaft. The bearing includes a ceramic material. The gear region of the gear shaft includes gear steel, whereas the bearing region of the gear shaft includes a bearing-region material that has a coefficient of thermal expansion (CTE) that is close to the CTE of the ceramic material.