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. 30, 2019
Filed:
Nov. 17, 2017
Applicant:
Ntn Corporation, Osaka-shi, JP;
Inventor:
Hayato Kawaguchi, Iwata, JP;
Assignee:
NTN Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H 1/24 (2006.01); F16H 55/02 (2006.01); F16H 25/22 (2006.01); B22F 3/02 (2006.01); F16H 25/24 (2006.01); F16H 35/18 (2006.01);
U.S. Cl.
CPC ...
F16H 25/2228 (2013.01); B22F 3/02 (2013.01); F16H 25/22 (2013.01); F16H 25/2223 (2013.01); F16H 25/24 (2013.01); F16H 35/18 (2013.01);
Abstract
A ball screw () has a bridge member () formed with a linking groove () on its inner surface that makes the rolling track a circulating track. The bridge member () is fit into a bridge window () formed on a barrel of a nut (). The bridge window () has a pair of opposite linear parts or walls (). These linear parts or walls have openings, formed by the helical screw groove, leading to the linking groove of the bridge member. The linear parts or walls are arranged so that they cross the lead angle (θ) of the nut screw groove at a right angle.