# US 12,215,891 B2 · Wind pressure-driven air intake device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,215,891 B2 - Document ID: US12215891B2 - Status: Granted - Kind: B2 - Application number: 18/233,771 - Filed: 2023-08-14 - Published: 2023-11-30 - Granted: 2025-02-04 - Earliest claimed: 2021-03-03 - Applicants: Jason Lin - Inventors: Jason Lin - Web page: https://patentgrep.com/patent/US12215891B2 ## CPC - F24F 7/02: Roof ventilation (ventilation of roof coverings E04D) - F24F 13/06: Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) ## Abstract This application discloses a wind pressure-driven air intake device for natural ventilation of zero power consumption. Such a device comprises multiple tunnels being arranged around a common central chamber, each having an inflow valve at its inner end connecting the central chamber and an outer end open to ambient airflow. The inflow valve allows only inward flow from a corresponding tunnel into the central chamber. The central chamber has an opening allowing airflow exit to a space to be ventilated. The device is capable of capturing ambient wind flow and wind pressure to be fed to the vented space regardless of wind flow direction towards the device, with no need for a powered air driver. ## Claims ### Claim 1 A natural wind pressure-driven air intake device, comprising: a plurality of tunnels arranged circumferentially around a central chamber, each of said plurality of tunnels having an inflow valve, an inner end radially abutting and connecting said central chamber, and an outer end open to ambient airflow, said inflow valve allowing only inward airflow from each of said plurality of tunnels into said central chamber, said central chamber having an aperture allowing airflow exit to a space to be ventilated, wherein each of said plurality of tunnels being straight, unbent/unturned, and unobstructed except by said inflow valve, and being directed straightly towards said central chamber, and said inner end facing at least one another said inner end. ### Claim 2 (depends on 1) The device of claim 1, wherein said inner end of each of said plurality of tunnels forming part of a circumference of said central chamber. ### Claim 3 (depends on 1) The device of claim 1, wherein at least one of said plurality of tunnels contracting inwardly with its said inner end facing said outer end and being smaller than said outer end. ### Claim 4 (depends on 1) The device of claim 1, wherein longitudinal axes of said plurality of tunnels being coplanar. ### Claim 5 (depends on 4) The device of claim 4, wherein said air intake device also includes at least one additional tunnel with its longitudinal axis being out of plane with the longitudinal axes of said plurality of tunnels. ### Claim 6 (depends on 1) The device of claim 1, wherein said inflow valve comprising a plurality of elongate flaps. ### Claim 7 (depends on 6) The device of claim 6, wherein said elongate flaps being arranged horizontally. ### Claim 8 (depends on 1) The device of claim 1, wherein said aperture being connected with a second chamber allowing fluid communication between said central chamber and said second chamber, and said second chamber having a second aperture allowing fluid communication between said second chamber and said space to be ventilated. ### Claim 9 (depends on 8) The device of claim 8, wherein a cap being supported over said second aperture inside said second chamber, said cap being larger in diameter than said second aperture. ### Claim 10 (depends on 8) The device of claim 8, wherein at least one drain orifice being facilitated at a lower perimeter of said second chamber. ### Claim 11 (depends on 1) The device of claim 1, wherein said aperture being connected with a tube extending away from said central chamber. ### Claim 12 (depends on 11) The device of claim 11, wherein said tube having at least one rainwater-proof mechanism. ### Claim 13 (depends on 12) The device of claim 12, wherein said rainwater-proof mechanism comprising at least one of drip edge and ridge dam on an inner wall of said tube. ### Claim 14 (depends on 1) The device of claim 1, wherein said device being facilitated with at least one protection screen. ### Claim 15 (depends on 14) The device of claim 14, wherein said protection screen being facilitated at said outer end of at least one of said plurality of tunnels. ### Claim 16 (depends on 1) The device of claim 1, wherein said device being facilitated with an air filter. ### Claim 17 (depends on 1) The device of claim 1, wherein said device being facilitated with an on/off switchable shutter to switch on or off said device. ### Claim 18 (depends on 1) The device of claim 1, wherein said device being elevated with at least one hollow support allowing fluid communication between said central chamber and said space to be ventilated through said aperture and said hollow support. ### Claim 19 (depends on 1) The device of claim 1, wherein said aperture being facilitated with a collar around its perimeter, to prevent rainwater from dripping into said space to be ventilated through said aperture. ### Claim 20 (depends on 1) The device of claim 1, wherein a plate surrounding said aperture having an upper surface sloped downwardly and outwardly, to prevent rainwater from dripping into said space to be ventilated.