Patent ID: 6601621
Filing Date: 2003-08-05
Classification: B23Q,B27C,B27G,Y10T

Abstract:
power wood working tool for performing a wood working operation on a wood workpiece, the wood working operation producing a sawdust byproduct, the power wood working tool comprising:a motor providing a source of rotary power, the motor having an output shaft and a housing, the housing having at least one air inlet aperture; a dust collection mechanism associated with the motor and having a volute housing, a dust hood and an impeller, the volute housing having a first inlet, a second inlet and an outlet, the first inlet being coupled in fluid connection to the air inlet aperture in the housing of the motor the dust hood enclosing an area proximate wood workpiece and being coupled in fluid connection to the second inlet in the volute housing, the impeller being rotatably coupled to the output shaft and disposed in the volute housing between the first and second inlets, the impeller including a first set of impeller blades and a second set of impeller blades, the first set of impeller blades generating a first air flow in which air flows through the air inlet aperture in the motor and into the first inlet in the volute housing, the second set of impeller blades generating a second air flow in which air flows through the dust hood and into the second inlet in the volute housing, the second air flow being sufficient to carry away at least a portion of the sawdust byproduct, the first and second air flows combining in the volute housing and being discharged through the outlet.