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:
Jul. 07, 2009
Filed:
Feb. 27, 2007
Applicants:
Koichiro Ono, Fujisawa, JP;
Nagao Dohi, Fujisawa, JP;
Inventors:
Koichiro Ono, Fujisawa, JP;
Nagao Dohi, Fujisawa, JP;
Assignee:
NSK Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 7/30 (2006.01);
U.S. Cl.
CPC ...
Abstract
There are provided first and second characteristic change portionsandhaving characteristic boundary inclination directions different from each other in an inner half portion and an outer half portion of the encoder. Detections portions of one pair of sensors() and() are opposed to three circumferential positions of both the characteristic change portionsand. A operator has a function of calculating the displacements x, y, z, and inclinations Φx, Φz, on the basis of phase differences among output signals of the sensors, and.