Patent ID: 6324340
Filing Date: 2001-11-27
Classification: F04D,F24H

Abstract:
In an electric fan, comprising a motor case, an externally-threaded boss formed at a front center of said motor case, a parabolic rear safety net detachably held on said boss using an annular nut tightened on said boss, a motor shaft projecting forward from a fan motor within the motor case through the center of said boss, a blade unit detachably held on the motor shaft using a knob nut tightened on said motor shaft, and a parabolic front safety net assembled with the rear safety net at their edges so as to form a safety net assembly covering the blade unit, the improvement comprising:a parabolic reflector designed to be detachably attached to a front end surface of said motor case using a nut while replacing the rear safety net; anda heat radiating body externally wound with a heating coil and designed to be detachably held on a seat of said parabolic reflector prior to being attached to the front end surface of the motor case using a plurality of locking screws while replacing the blade unit, with the heating coil being operated in conjunction with an existing electric circuit of the fan,whereby the electric fan is selectively usable as an electric radiation heater as desired.