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:
May. 26, 2020
Filed:
Mar. 31, 2016
Applicant:
Nsk Ltd., Tokyo, JP;
Inventors:
Kazunari Miyazaki, Tokyo, JP;
Keisuke Muto, Fujisawa, JP;
Yutaka Nagai, Fujisawa, JP;
Satoru Arai, Fujisawa, JP;
Daisuke Maruyama, Fujisawa, JP;
Masahiro Nobutomo, Fujisawa, JP;
Assignee:
NSK LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 25/22 (2006.01); F16H 25/24 (2006.01);
U.S. Cl.
CPC ...
F16H 25/2409 (2013.01); F16H 25/22 (2013.01); F16H 25/2204 (2013.01); F16H 25/24 (2013.01); F16H 25/2427 (2013.01); F16H 2025/2481 (2013.01);
Abstract
Provided is a screw shaft in a ball screw device. At least a part of the screw shaft includes a cylindrical body which is manufactured by a filament winding method or a sheet winding method, and a spiral member or a partitioned spiral member which is fixed to an outer circumferential surface of the cylindrical body and forms a thread groove.