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:
Feb. 02, 2016
Filed:
Sep. 25, 2013
Applicant:
Mori Seiki Co., Ltd., Yamato-Koriyama, Nara, JP;
Inventors:
Masaaki Kusumi, Isehara, JP;
Daisuke Uchiyama, Isehara, JP;
Assignee:
MORI SEIKI CO., LTD., Yamato-Koriyama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01B 7/14 (2006.01); G01D 5/38 (2006.01); G11B 3/00 (2006.01); G01D 5/245 (2006.01);
U.S. Cl.
CPC ...
G01B 7/14 (2013.01); G01D 5/38 (2013.01); G01D 5/2457 (2013.01); G11B 3/00 (2013.01); G11B 2209/00 (2013.01); G11B 2220/00 (2013.01);
Abstract
A displacement detection apparatus includes a scale unit and a detection head unit. The scale unit has a reference track unit and sub-track units, the pitch directions of these units being different from one another. The detection head unit has three or more detection units configured to read scales of the reference track unit and the sub-track units and to output signals in accordance with the read scales. The three detection units detect displacement in two orthogonal directions on a plane parallel to a plane along which the detection head unit moves.