Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1986-09-16
1988-08-30
Bartis, Anthony
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
34 97, 34243R, 219364, 219367, 219375, 219376, H05B 102, H05B 300, A45D 2010, A45D 2038
Patent
active
047679140
ABSTRACT:
A hair dryer with a frusto-conical casing tapering from a larger rear air inlet end to a smaller air outlet end contains in coaxial alignment therewith in an electric heater element shaped as a cylindrical open-ended cage and an electric motor extending partly into the cage and driving axial fan positioned rearwardly of the cage. The cage consists of series connected spaced parallel metal strips held by electrically non-conductive end rings and inclined to the cage circumference to form air guide vanes. The cage divides the casing space into an annular outer duct decreasing in cross section toward its front end and closed by contact with the casing and an annular inner duct between the cage and motor. Part of the air from the fan flows through the outer duct and through the vanes to the cage interior while the remainder flows through the inner space to cool the motor. The two air streams mix to the required temperature in the cage interior downstream of the motor for discharge through the air outlet. The heater element may comprise a pair of same diameter cages arranged end to end or a pair of nested inner and outer cages with the pairs of cages being energizable separately or in parallel.
REFERENCES:
patent: 2158603 (1939-05-01), Calhoun
patent: 4039774 (1977-08-01), Kata et al.
patent: 4066865 (1978-01-01), Godel et al.
patent: 4197448 (1980-04-01), Harigai
patent: 4328818 (1982-05-01), Glucksman
patent: 4350872 (1982-09-01), Meywald et al.
patent: 4647757 (1987-03-01), Haastrup
Bartis Anthony
Bundren William J.
Roberts, Jr. John S.
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