Hybrid hot air heater

Details Hybrid hot air heater Hybrid hot air heater

2005-04-19

2005-04-19

Jeffery, John A. (Department: 3742)

Electric resistance heating devices

Heating devices

Combined with nonelectric heating means

C392S365000

Reexamination Certificate

active

06882796

ABSTRACT:
In a configuration of a hybrid hot air heater in which a gas heater unit2and an electric heater unit3are incorporated into one chassis at the upper part and lower part, respectively, in such a manner that their respective air-blowing systems may be independent of each other, the heater itself is made more compact even with increases in the cross-sectional area of inlets13aand13bequipped with anti-dust filters6aand6b, respectively. The second inlet13bof the electric heater unit3provided on the chassis11is arranged below a gas burner20in such a manner as to conserver space and serves as an air inlet passage on the rear side of a housing211of a first air-blowing fan21that separates the gas heater unit2and the electric heater unit3from each other.

REFERENCES:
patent: 2060079 (1936-11-01), Hood
patent: 3295334 (1967-01-01), Lennart
patent: 5937139 (1999-08-01), Peterson
patent: 6795643 (2004-09-01), Ito et al.
patent: 20040103892 (2004-06-01), Shimonoma et al.
patent: 20040109680 (2004-06-01), Ito et al.
patent: 20040151480 (2004-08-01), Ito et al.
patent: 2610089 (1988-07-01), None
patent: 2687899 (1993-09-01), None
patent: 55-63348 (1980-05-01), None

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