Patent ID: 9457304
Filing Date: 2016-10-04
CPC Classification: B01D,E04D,F24F,Y02B

Claim Text:
1. A roof vent for ventilating a roof of a building via a hole in the roof to the atmosphere, the roof vent comprising: a flange portion for resting on the roof, the flange portion having an opening for overlapping with the hole; a frame portion having sides extending upwardly from the flange portion about the opening, the frame portion for maintaining a cap in a spaced apart relationship with the flange portion; the cap connected to the frame portion and covering over the opening; and a corrugated filter plate positioned between the cap and the flange portion, the corrugated filter plate having a corrugated surface simultaneously, exposing a plurality of alternating folds as furrows and ridges to a passage of air providing a surface area to the passage of air greater than a corresponding planar cross-sectional area of a side of the roof vent, each of the plurality of folds comprising a fold line extending in a direction from the flange portion to the cap, each of the alternating folds having a plurality of individual pores spaced apart from one another on a respective surface of each of the plurality of folds, the corrugated filter plate facilitating the passage of air between the atmosphere and the opening by having a pore size of each of the plurality of individual pores sufficient for facilitating the passage of air through the corrugated filter plate while blocking passage of water droplets through the corrugated filter plate; wherein summation of an effective open area of said each of the plurality of individual pores satisfies a minimum net open area threshold for the planar cross-sectional area.