Electric hair dryer with clogged filter indicator

Details Electric hair dryer with clogged filter indicator Electric hair dryer with clogged filter indicator

1994-04-21

1995-09-05

Jeffery, John A.

Electric resistance heating devices

Heating devices

Concentrated heated air stream

34 85, 34 97, 7320425, 55274, 340607, A45D 2030, H05B 102

Patent

active

054486777

ABSTRACT:
A hair dryer has a housing including an air inlet opening and an air exit opening for passage of an air stream. The housing accommodates a blower structure and a heater, and the air inlet opening has associated to it a filter element. Provided in the housing are a detector producing an output signal in dependence upon at least one temperature prevailing in the housing and having associated thereto a signaling device which is actuatable on attainment of a predeterminable threshold value of the output signal. The signaling device indicates to the user of the hair dryer that the filter element requires cleaning or replacement.

REFERENCES:
patent: 2514528 (1950-07-01), Wahl
patent: 2625239 (1953-01-01), Senne
patent: 3611337 (1971-10-01), Balzer et al.
patent: 3812370 (1974-05-01), La Violette
patent: 3955065 (1976-05-01), Chambon
patent: 4311995 (1982-01-01), Kinzie
patent: 4634839 (1987-01-01), Gilbertson
patent: 4642128 (1987-02-01), Solozano
patent: 5111692 (1992-05-01), McQueen et al.
Braun PF1600 hair dryer product literature, 1990.

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