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:
Jun. 13, 1995
Filed:
Jun. 11, 1992
Applicant:
Inventor:
Hiroyuki Matsuzaki, Kanagawa, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01H / ; G01M / ; G01N / ;
U.S. Cl.
CPC ...
73593 ; 7386259 ;
Abstract
While maintaining an outer ring in a fixed state, an inner ring is rotated. Radial vibrations of the outer ring are detected by a vibration pickup, and detection signals are delivered to a frequency converter via an amplifier. The frequency converter determines, by Fourier transformation, the rotation frequency of the inner ring and the revolution frequency of balls. The processor then calculates the contact angle of a rolling bearing on the basis of these rotation frequency and revolution frequency.