Laminar streamflow-guided hair dryer with finned PTC heating mea

Details Laminar streamflow-guided hair dryer with finned PTC heating mea Laminar streamflow-guided hair dryer with finned PTC heating mea

1992-07-09

1993-09-07

Bartis, Anthony

Electric resistance heating devices

Heating devices

Concentrated heated air stream

165183, 219505, 219530, 219540, 219544, 338 22R, 338 51, 392360, 392365, 392385, 392485, H05B 102, H05B 310, F24H 302, A45D 2010

Patent

active

052436837

ABSTRACT:
A hair dryer includes a plurality of elongated positive-temperature-coefficient (PTC) semiconductor heating units disposed in transverse side-by-side spaced relation in a linear array in a central air flow passage of an elongated tubular duct connected to a discharge port of a casing having an air fan rotatably mounted in the casing for blowing air through the air flow passage of the duct, each PTC heating unit defining a longitudinal axis disposed perpendicular to a longitudinal axis of the air flow passage of the duct and a plurality of elongated spaced fins longitudinally juxtapositionally mounted on the PTC semiconductor heating unit transversely of the longitudinal axis of the PTC heating unit, whereby upon a powering of the PTC heating unit and the fan to heat air as blown by the fan, the heated air will be guided in the tubular duct by the plurality of elongaed spaced fins to produce laminar air streamflow helpful for smoothly setting and drying hair or the like.

REFERENCES:
patent: 1730982 (1929-10-01), Pankratz et al.
patent: 1771752 (1930-07-01), Fischer
patent: 1928270 (1933-09-01), Shirley
patent: 2085772 (1937-07-01), Soverhill
patent: 2405722 (1946-08-01), Villier
patent: 3263749 (1966-08-01), Dormiter
patent: 4939349 (1990-07-01), Liu
patent: 4942289 (1990-07-01), Roller et al.
patent: 4990748 (1991-02-01), Starck

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