Air heater

Details Air heater Air heater

2005-06-28

2005-06-28

Robinson, Daniel (Department: 3742)

Electric heating

Heating devices

With power supply and voltage or current regulation or...

Reexamination Certificate

active

06911630

ABSTRACT:
Air heater with PTC heating element with semiconductor switch, the semiconductor switch (5) without the housing being located in the heating tube (9) in the immediate vicinity of the PTC heating element (15).

REFERENCES:
patent: 4196338 (1980-04-01), Edel
patent: 4237366 (1980-12-01), Berg
patent: 4506137 (1985-03-01), Meister
patent: 4716279 (1987-12-01), Hori et al.
patent: 5598502 (1997-01-01), Takahashi et al.
patent: 6320159 (2001-11-01), Topp
patent: 6410886 (2002-06-01), Julien
patent: 19751423 (1997-11-01), None
patent: 197 38 318 (1999-03-01), None
patent: 198 48 169 (1999-05-01), None
patent: 197 51 423 (1999-06-01), None
patent: 0 554 459 (1993-08-01), None

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