Blowing device for removing wooden powder

Abstract

A blowing device includes a casing having an circular wall located eccentrically in the casing. A rotor is rotatably received in the circular wall and a plurality of blades retractably extend from the rotor and contact an inner periphery of the circular wall. A first inlet is defined through the casing and an outlet is defined through the circular wall. A second inlet is defined through the circular wall. A fitting extends through the casing and is engaged with the outlet. When the rotor is rotated in the circular wall, a plurality of partitions are defined by the blades in the circular wall and is sent out from the fitting to blow the wood powder or debris.

What is claimed is:  
     
         1 . A blowing device comprising: 
 a casing having an circular wall which is located eccentrically in the casing with ribs connected between an inner periphery of the casing and the circular wall, a first inlet defined through the casing and an outlet defined through the circular wall, a fitting extending through the casing and engaged with the outlet, and    a rotor rotatably received in the circular wall and a plurality of blades retractably extending from the rotor and contacting an inner periphery of the circular wall, a second inlet defined through the circular wall.    
     
     
         2 . The blowing device as claimed in  claim 1  further comprising an inlet valve engaged with the first inlet and an air filter received in the inlet valve.  
     
     
         3 . The blowing device as claimed in  claim 1  further comprising a hose connected to the fitting.  
     
     
         4 . The blowing device as claimed in  claim 1  wherein the circular wall  22  has a ring  31  which is connected to the inner periphery of the circular wall  2  by connection members, each connection member has a chamber  33  defined therein and the blades  34  having an end thereof retractably received in the chambers  33 .