Patent ID: 8616158
Filing Date: 2013-12-31
Classification: F04D

Abstract:
1. A heater blower apparatus that is attachable to an exterior surface of a heater having an exhaust opening on the exterior surface with the exhaust opening having a center axis that defines mutually perpendicular axial and radial directions relative to the heater, the apparatus comprising: a motor, the motor having a shaft that is rotated on operation of the motor, the shaft having an axis of rotation that defines mutually perpendicular axial and radial directions relative to the apparatus; a fan connected to the motor shaft for rotation of the fan with rotation of the motor shaft, the fan having an axis of rotation and a circumference of rotation; a blower housing having an interior containing the fan, the motor being supported by the blower housing with the motor shaft extending into the interior of the blower housing to the fan contained inside the blower housing interior, the blower housing having an output opening that communicates the blower housing interior with an exterior environment of the blower housing and is positioned on the blower housing at a radially spaced position from the fan contained in the blower housing interior, the blower housing output opening having a center axis, and the blower housing being attachable to the heater exterior surface with the heater exhaust opening contained inside the blower housing interior in a manner such that a center axis of the heater exhaust opening is substantially coaxial with the center axis of the blower housing output opening and with interior structure of the blower housing together with the heater exhaust opening and heater exterior surface defining an exhaust gas flow path that extends axially from the heater exhaust opening into the blower housing interior volume, then extends radially through the blower housing interior toward the fan, then extends axially through the blower housing interior outside of the fan circumference of rotation, then extends radially through the blower housing interior toward the motor shaft axis of rotation, then extends axially through the blower housing interior and into the fan circumference of rotation, then extends radially through the blower housing interior away from the motor shaft axis of rotation and through the fan circumference of rotation toward the blower housing output opening, and then extends axially through the blower housing interior and axially through the blower housing output opening to the exterior environment of the blower housing.