US2007248461A1PendingUtilityA1

Fan generating medium wind pressure and air supply

44
Assignee: LEE SHN-YUNGPriority: Apr 25, 2006Filed: Apr 25, 2006Published: Oct 25, 2007
Est. expiryApr 25, 2026(expired)· nominal 20-yr term from priority
Inventors:Shn-Yung LeeShueei-Muh Lin
F04D 17/06
44
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Claims

Abstract

A fan includes a casing with a small inlet and a wide outlet. A blade unit includes a hub and a plurality of inclined blades extend radially from an outer periphery of the hub. The hub is located close to the inlet and the inclined blades extend toward the outlet. A positioning frame is connected to the casing and has a cone-shaped body. A cone-shaped gap is defined between an outer periphery of the cone-shaped body and an inner periphery of the casing. The cone-shaped body and the fan unit can be manufactured by molding and the motor is enclosed by the cone-shaped body so as to reduce the space that the fan occupies. The fan generates medium wind pressure and air supply.

Claims

exact text as granted — not AI-modified
1 . A fan comprising: 
 a casing having an inlet and an outlet which has a diameter larger that a diameter of the inlet;    a blade unit having a hub at a center thereof and a plurality of inclined blades extending radially from an outer periphery of the hub, the hub located close to the inlet and the inclined blades extending toward the outlet, and    a positioning frame having a cone-shaped body and a plurality of arms extending from the cone-shaped body, the cone-shaped body having a narrow end which is located close to the inlet and a wide end which is located close to the outlet, the arms connected to the casing.    
   
   
       2 . The fan as claimed in  claim 1 , wherein the blade unit and the cone-shaped body of the positioning frame can be manufactured individually.  
   
   
       3 . The fan as claimed in  claim 1 , wherein the blade unit and the cone-shaped body of the positioning frame are co-rotated.  
   
   
       4 . The fan as claimed in  claim 1 , wherein the cone-shaped body of the positioning frame is stationary and the blade unit is rotatable.  
   
   
       5 . The fan as claimed in  claim 1 , wherein a reinforcement ring is connected to respective outside of the blades.  
   
   
       6 . The fan as claimed in  claim 1 , wherein the cone-shaped body encloses a motor which drives the fan unit.

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