Patent ID: 8449252
Filing Date: 2013-05-28
Classification: F04D

Abstract:
1. A ceiling fan assembly, the assembly comprising: a motor positioned to rotate about an axis; a motor housing connected to and simultaneously rotatable with the motor about the axis; a first set of fan blades connected to and having at least portions thereof extending radially and outwardly through the motor housing and positioned to rotate in a first rotational direction relative to the axis when the motor operates; a blade housing positioned below the motor housing and rotatable about the axis; and a second set of fan blades connected to and having at least portions thereof extending radially and outwardly through the blade housing and positioned to rotate in a second rotational direction relative to the axis and opposite to the first rotational direction when the motor operates and simultaneous with the first set of fan blades rotating in the first rotational direction so that air currents generated during operation of the first set of blades when being driven by the motor and rotating in the first rotational direction responsively causes simultaneous rotation of the second set of blades in the second rotational direction.