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:
Oct. 01, 2024
Filed:
Jul. 10, 2018
Nikon Corporation, Tokyo, JP;
Kou Ohno, Sendai, JP;
Hiroyuki Kishida, Yachiyo, JP;
NIKON CORPORATION, Tokyo, JP;
Abstract
An encoder for detecting rotation information of a first rotation shaft includes a first detector which detects a pattern provided in the first rotation shaft, a first housing case which houses the pattern provided in the first rotation shaft and the first detector, a second housing case which houses at least a part of a shaft portion different from a portion where the pattern is provided, of the first rotation shaft, and an adjusting mechanism which adjusts at least one of an atmospheric pressure and a temperature in the first housing case to be higher than at least one of an atmospheric pressure and a temperature in the second housing case. The inflow of the high-humidity air from a motor into the encoder is prevented or suppressed, so that the condensation in the encoder can be prevented or suppressed.