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. 10, 2018
Filed:
Nov. 27, 2014
Applicant:
Nsk Ltd., Shinagawa-ku, Tokyo, JP;
Inventors:
Kazunari Miyazaki, Fujisawa, JP;
Daisuke Maruyama, Fujisawa, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 25/24 (2006.01); F16H 25/22 (2006.01); F16H 57/04 (2010.01);
U.S. Cl.
CPC ...
F16H 25/2418 (2013.01); F16H 25/2204 (2013.01); F16H 57/0406 (2013.01); F16H 57/0464 (2013.01); F16H 57/0497 (2013.01);
Abstract
There are provided a ball screw that more efficiently prevents accumulation and scattering of extra grease in a nut and a seal used in the ball screw. In order to do that, a grease reservoir portion is provided on an inner peripheral surface of a seal provided at an end of a nut on rear side of a moving direction of a ball screw so as to form a space with respect to a screw shaft. The grease reservoir portion is open to an outer peripheral surface of the seal and communicates with slits formed on the outer peripheral surface of the seal.