Patent ID: 8080094
Filing Date: 2011-12-20
Classification: B03C

Abstract:
1. Apparatus, comprising: a chamber; an air inlet leading to an air flow pathway through the chamber; an air outlet leading from the air flow pathway through the chamber; a filter disposed in the air flow pathway between the air inlet and the air outlet for entrapping contaminants in an air stream passing through the air flow pathway from the air inlet to the air outlet; an ionizer electrode, electrically connected for carrying a first potential, disposed in the air flow pathway between the air inlet and the filter; an upstream electrode disposed in the air flow pathway between the air inlet and the ionizer electrode; a downstream electrode disposed in the air flow pathway between the air outlet and the filter; an abutment comprising a support member and a length of spring steel, the abutment being disposed in the air flow pathway between the air outlet and the downstream electrode, the abutment acting on the downstream electrode urging the downstream electrode in contact against the filter; the first potential carried by the ionizer electrode imparting through induction a) a second potential to the upstream electrode forming a first ionizing field between the upstream electrode and the ionizer electrode, and b) a third potential to the downstream electrode forming a second ionizing field between the downstream electrode and the ionizer electrode; and the abutment acting on the downstream electrode urging the downstream electrode in contact against the filter maintaining the second ionizing field with the filter.