US Patent 11009253 Vent structure

A vent apparatus that prevents the ingress of flames, superheated air, and/or flaming materials (e.g., embers) from an external fire to a building or structure is disclosed. The vent apparatus comprises a frame that defines an inlet, and outlet, and an internal passage. A guiding member is disposed within the internal passage to thereby deflect or direct a portion of a flow of material between the inlet and outlet. A blocking element is disposed on the guiding member that is configured to expand to at least partially block the flow of material between the inlet and outlet.