Patent ID: 7095953

Claim:
Electrical device for releasing active substances, which includes a container ( 1 ) for an active substance in a liquid state, a heater ( 9 ) for evaporating this active substance and a socket plug ( 7 ) for power supply to the heater, characterised in that the container ( 1 ) includes a permeable membrane ( 3 ) which seals an open base of said container, said membrane ( 3 ) being composed of a polymeric material which allows vapour of the active substance to pass through the membrane but prevents the active substance in liquid state from passing through the membrane, the inner face of said membrane ( 3 ) being provided with a plain porous support ( 5 ) defining a wick by way of which the active substance is taken to the centre of the membrane ( 3 ), whilst, externally to the membrane, in correspondence with an intermediate area of the membrane and adjacent to said membrane, lies the heater element ( 9 ).