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. 14, 2012
Filed:
Oct. 30, 2009
Chin-shiong Tsai, Taoyuan Shien, TW;
Hong-cheng Sheu, Taoyuan Shien, TW;
Mi-tien Tsai, Taoyuan Shien, TW;
Chun-chin Su, Taoyuan Shien, TW;
Chin-Shiong Tsai, Taoyuan Shien, TW;
Hong-Cheng Sheu, Taoyuan Shien, TW;
Mi-Tien Tsai, Taoyuan Shien, TW;
Chun-Chin Su, Taoyuan Shien, TW;
Delta Electronics, Inc., Taoyuan, TW;
Abstract
An encoder having an oil mist prevention structure includes: an encoding body including a cylindrical base, a light emitter and a secondary encoding piece; an oil-containing bearing received and fixed in the cylindrical base; a shaft penetrating the oil-containing bearing to protrude beyond an end surface of the bearing; a rotary disk fixed onto the shaft to cover one side of the secondary encoding piece; a light acceptor fixed to the cylindrical base to correspond to the light emitter and the secondary encoding piece, thereby receiving the signals emitted by the light emitter; and an oil mist prevention structure including a mask integrally formed with the shaft and exposed beyond an end surface of the bearing and a ring extending from the mask for covering an outer periphery of the bearing.