Apparatus for emitting a volatile chemical agent by heating and

Details Apparatus for emitting a volatile chemical agent by heating and Apparatus for emitting a volatile chemical agent by heating and

1992-04-29

1995-03-28

Walberg, Teresa J.

Electric resistance heating devices

Heating devices

Vaporizer

392390, 392392, A61L 902

Patent

active

054025176

ABSTRACT:
An apparatus for emitting a chemical agent includes a housing defined by first and second co-axial housing sections received in end-to-end engagement, a heating element in the second housing section. The heat supplied to the chemical agent is varied so that the rate of vaporization can be controlled. The first housing section includes a vented base portion and a wall portion connected to the base portion so as to define a recess for receiving a volatile chemical agent. The chemical agent or a carrier therefor is secured within the recess. The second housing section includes a solid base portion and a wall portion connected to the base portion. An electric heater element is imbedded within the base portion of the second housing section so that it is electrically isolated from the base surface. The wall portions of each section are received in co-axial engagement so that the chemical agent is adjacent to the heated base. The spacing is varied by relatively movable cooperating formations on the wall portions of the two housing sections which guide and facilitate movement of the first housing section with respect to the second housing section. In a preferred embodiment the cooperating formations are cooperating threads on the surfaces of the wall portions.

REFERENCES:
patent: 2588471 (1952-03-01), Bauer
patent: 3431393 (1969-03-01), Katsuda
patent: 3948445 (1976-04-01), Andeweg
patent: 4769528 (1988-09-01), Von Philipp et al.
patent: 5115975 (1992-05-01), Shilling

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