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:
Oct. 08, 2019
Filed:
Jul. 04, 2013
Ntn Corporation, Osaka, JP;
Takashi Ito, Kuwana, JP;
Takumi Fujita, Kuwana, JP;
NTN CORPORATION, Osaka, JP;
Abstract
The lifetime estimation device for a rolling bearing includes a buildup height estimation unit operable for estimating the buildup height of the indentation from a rolling surface from the depth of an indentation or the indentation size in accordance with a predetermined rule; and a lifetime estimation unit for estimating the service life of the rolling bearing in accordance with a rule stipulated according to the relationship between the estimated buildup height of the indentation and the rate of reduction of the rolling fatigue life and a dynamic equivalent load. The lifetime estimation unit calculates the service life of the rolling bearing corresponding to the contact surface pressure.