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:
Jul. 16, 2013
Filed:
Mar. 17, 2011
Ikuo Watanabe, Yokohama, JP;
Masahiko Igaki, Yokohama, JP;
Chihiro Nagura, Yokohama, JP;
Hiraku Kozuka, Hiratsuka, JP;
Satoru Hamasaki, Yamato, JP;
Makoto Ogura, Sagamihara, JP;
Tsutomu Nagao, Hirosaki, JP;
Yasuji Yokoyama, Hirosaki, JP;
Ikuo Watanabe, Yokohama, JP;
Masahiko Igaki, Yokohama, JP;
Chihiro Nagura, Yokohama, JP;
Hiraku Kozuka, Hiratsuka, JP;
Satoru Hamasaki, Yamato, JP;
Makoto Ogura, Sagamihara, JP;
Tsutomu Nagao, Hirosaki, JP;
Yasuji Yokoyama, Hirosaki, JP;
Canon Kabushiki Kaisha, , JP;
Canon Precision Inc., , JP;
Abstract
Provided is a rotary encoder, including: a rotary scale, which has a predetermined pattern including continuous patterns and a rotational angle original point formed thereon with reference to a pattern center, has a polygonal outer shape, and has the rotational angle original point defined with reference to at least one side of sides of the polygonal outer shape; a hub, which includes projections for abutting the sides of the polygonal outer shape of the rotary scale and positioning the rotary scale; a rotating shaft, which is press-fitted into the hub and rotates coaxially with the pattern center of the rotary scale; and detecting units for irradiating the rotary scale with light and detecting the light reflected by the rotary scale.