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. 07, 1995
Filed:
Mar. 28, 1994
Li-Mei Chen, Tai-Ping Hsiang, Taichung Hsien, TW;
Other;
Abstract
A fan is capable of directing air passing between upstream and downstream ends of the fan to flow in both axial and radial directions and includes a hub, a plurality of fan blades and a ring. The hub is shaped as a truncated cone with a wide upstream end and a narrow downstream end. Each of the fan blades has an upstream edge, an outer end and an inner end connected to the hub. The fan blades project radially and outwardly from the hub and are spaced circumferentially. The ring is disposed at the upstream edges of the fan blades and interconnects the outer ends of the latter. The ring is formed with a plurality of curved strips which extend respectively between two adjacent fan blades to permit air flow in the radial direction. The curved strips cooperate with the hub to form passages which permit air flow in the axial direction, and are shaped as sections of a parabolic surface which opens toward the upstream end of the hub.