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. 25, 2020
Filed:
Nov. 01, 2018
Mitutoyo Corporation, Kawasaki, Kanagawa, JP;
Tomohiro Tahara, Tokyo, JP;
MITUTOYO CORPORATION, Kawasaki, JP;
Abstract
The electromagnetic induction type position detector includes a scale having a plurality of gradation coils, a head having a transmission unit and a reception unit, and a control unit. Each of the plurality of graduation coils includes a transmission graduation arranged with a pitch L, a reception graduation arranged with a pitch Ldifferent from the pitch L, and a connection unit. The transmission unit includes three transmission coil groups that are constituted by pluralities of transmission coils, each being arranged with a pitch L, and that are arranged such that adjacent transmission coil groups have a phase difference. The reception unit includes three reception coil groups that are constituted by pluralities of reception coils, each being arranged with a pitch L, and that are arranged such that adjacent reception coil groups have a phase difference identical to the phase difference of the three transmission coil groups.