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:
May. 04, 2021
Filed:
Oct. 02, 2019
Mitutoyo Corporation, Kanagawa, JP;
Hiroto Kubozono, Kanagawa, JP;
MITUTOYO CORPORATION, Kawasaki, JP;
Abstract
An electromagnetic induction type encoder includes a detection head and a scale. The detection head has a transmitter coil configured to generate magnetic flux. The scale has connection coils that are arrayed in a measurement axis direction, are configured to be electromagnetically coupled with magnetic flux generated by the transmitter coil and generate magnetic flux that fluctuates in a predetermined spatial period in the measurement axis direction. The detection head has a receiver coil having a plurality of coils that are arrayed in the measurement axis direction on a predetermined face of the detection head, are configured to be electromagnetically coupled with the magnetic flux generated by the connection coils and detect a phase of the magnetic flux. A current direction of one of the plurality of coils is opposite to a current direction of another coil of the plurality of coils next to each other.