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:
Mar. 27, 2001
Filed:
Jun. 18, 1999
Woang Sik Park, Suwon, KR;
Chang Keun Jun, Shiung, KR;
Samsung Electro-Mechanics Co., Ltd., Kyungki-Do, KR;
Abstract
Disclosed is a micro fan. The micro fan comprises a hub rotatably mounted to a shaft, and a plurality of blades radially formed on a circumferential outer surface of the hub, wherein each blade has an airfoil-shaped cross-section which generates lift force larger than drag force; and wherein, when assuming that one end of the airfoil-shaped cross-section of each blade, which is rounded at a predetermined radius, is a leading edge, the other end of the airfoil-shaped cross-section of each blade is a trailing edge, a straight line which connects the leading edge and the trailing edge with each other is a chord line, a thickness center line between the leading edge and the trailing edge is a mean line, and an inclination angle of the chord line with respect to a parallel line which is drawn from the leading edge is a blade angle, a blade angle at a root of the blade which is adjacent to the hub is about 24°-34°, a blade angle at a tip of the blade which is adjacent to a duct of the micro fan is about 18°-28°, and a span twist angle which is represented by a difference between the blade angles at the root and the tip is 2°-12° of helical twist.