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:
Mar. 05, 1996
Filed:
Apr. 06, 1995
Applicant:
Inventors:
Hiroyuki Matsuzaki, Kanagawa, JP;
Hisakazu Tadokoro, Kanagawa, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M / ;
U.S. Cl.
CPC ...
73593 ;
Abstract
A vibration measurement system 1 comprises a shrink-type chuck 5, a spindle 14, and a servo motor 16 as mechanical elements, and has a vibration pickup 41 attached to the outer peripheral surface of a jaw 5a holding an outer ring 4 of a roller bearing 2. A ring groove 5b is formed on the inner face of the jaw 5a holding the bearing 2, and a shell 18 with oil pressure as back pressure is fitted into the ring groove 5b. When vibration is measured, the oil pressure of the shell 18 is raised to bring bearing clearance to zero, thereby preventing so-called roller drop from causing impulsive vibration.