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:
Dec. 25, 2018
Filed:
Aug. 14, 2017
Taiyo Yuden Co., Ltd., Tokyo, JP;
Hiroya Kakimoto, Tokyo, JP;
TAIYO YUDEN CO., LTD., Tokyo, JP;
Abstract
A rotary joint includes a fixed unit and a rotating unit arranged substantially orthogonal to a center axis and facing one another, as well as a substantially cylindrical light guide member arranged therebetween. A light-emitting device and a light-receiving device are provided on each of the units. The light guide member is configured such that an amount of the light from the light-emitting device on the fixed unit that is received by the light-receiving device on the rotating unit and an amount of the light from the light-emitting device on the rotating unit that is received by the light-receiving device on the fixed unit both exceed a prescribed minimum amount regardless of rotational positions of the rotating unit.