Patent ID: 6269781
Filing Date: 2001-08-07
Classification: F24V

Abstract:
A heat generator comprising:a housing forming therein a heat-generating chamber and a heat-receiving chamber neighboring said heat-generating chamber and circulating a fluid;a drive shaft rotatably supported by said housing via bearing devices;a rotor rotatably provided in said heat-generating chamber by said drive shaft; anda viscous fluid filled in the gaps among wall surfaces of the heat-generating chamber and outer surfaces of the rotor and generates heat due to the shearing when said rotor is rotated; whereinsaid rotor includes a main rotor body for shearing said viscous fluid made of a material having a coefficient of thermal expansion larger than that of said drive shaft, and a base portion made of a material having a coefficient of thermal expansion equivalent to that of said drive shaft, inserted into said main rotor body and secured to said drive shaft while being positioned upon coming in contact with a positioning member, said rotor main body and said positioning member maintaining a gap which permits a thermal expansion of said rotor main body relative to said positioning member.