Patent ID: 6210118
Filing Date: 2001-04-03
Classification: F04D,Y10S

Abstract:
A thin, motor-driven centrifugal blowing fan apparatus provided in a housing with an inlet, an outlet and bottom face for drawing in air in the direction of an axis of rotation and discharging the air through the outlet substantially perpendicular to the axis of rotation, comprising:a rotor centrally located on the axis of rotation and rotating about the axis of rotation in a rotational direction;a plurality of axial blade sections disposed around a peripheral portion of said rotor and individually arranged at predetermined acute angles to said rotational direction; anda like plurality of centrifugal blade sections, each of said centrifugal blade sections extending from a corresponding axial blade sections and individually arranged substantially at an angle of 90 degrees to said rotational direction through the entirety of a tip of the centrifugal blade section, each of said centrifugal blade sections and said axial blade sections having a bottom edge positioned parallel to the bottom face of the housing.