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:
Sep. 01, 2009
Filed:
Jun. 13, 2006
Seung-do Han, Incheon, KR;
Seung-suk OH, Gwangmyeong, KR;
Jae-hong Ahn, Anyang, KR;
Hyoun-jeong Shin, Incheon, KR;
Dong-il Lee, Bucheon, KR;
Seung-Do Han, Incheon, KR;
Seung-Suk Oh, Gwangmyeong, KR;
Jae-Hong Ahn, Anyang, KR;
Hyoun-Jeong Shin, Incheon, KR;
Dong-Il Lee, Bucheon, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A motor having a reverse-rotation preventing unit, comprises: a casing; a stator fixedly-coupled to an inside of the casing; a primary rotor rotatably inserted into the stator; a motor shaft coupled to the primary rotor; a secondary rotor having a permanent magnet and rotatably inserted into an air gap between the stator and the primary rotor; a locking unit installed at an inner wall of the casing; a ratchet unit rotatably coupled to the secondary rotor, and locked or unlocked to/from the locking unit when the secondary rotor is forward-rotated or reverse-rotated, for rotating the secondary rotor in a forward direction; and a position setting unit for moving the ratchet unit to a locking position or a unlocking position by a difference between a centrifugal force generated when the secondary rotor is rotated and its restoration force. In the present invention, the motor is only forward-rotated without being reverse-rotated and thus a reliability thereof is enhanced.