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. 13, 2025
Filed:
Oct. 26, 2021
Ntn Corporation, Osaka, JP;
Hayato Kawaguchi, Shizuoka, JP;
Toshiki Masuda, Shizuoka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
An insulated bearing device includes a housing, an outer ring and rolling elements, and an insulating film for providing electrical insulation between the housing and the outer ring is disposed on the surface of the outer ring. The insulating film includes a straight portion extending along the outer periphery of the outer ring and having a constant outer diameter in the axial direction. The housing has, on the inner periphery of its housing hole, an inner peripheral cylindrical surface formed at a position intersecting with the axial centerlines of the rolling elements, and the straight portion is fitted to, and in contact with, the inner peripheral cylindrical surface. The contact range (area of contact) between the inner peripheral cylindrical surface and the straight portion has an axial length shorter than the entire axial length of the straight portion.