# US 12,213,553 B2 · Head protection with integrated air filtration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,553 B2 - Document ID: US12213553B2 - Status: Granted - Kind: B2 - Application number: 18/031,577 - Filed: 2021-10-09 - Published: 2023-12-07 - Granted: 2025-02-04 - Earliest claimed: 2020-10-13 - Assignees: Gilz LLC - Applicants: Gilz LLC - Inventors: Michael Joshua Kefauver; Brandon Lance Johnson - Web page: https://patentgrep.com/patent/US12213553B2 ## CPC - A42B 3/286: {with forced flow, e.g. by a fan} - A62B 18/04: Gas helmets - A42B 3/24: with means for avoiding fogging or misting - A42B 3/288: {with means for attaching respirators or breathing masks} - A62B 18/006: {with pumps for forced ventilation (A62B18/045 takes precedence)} - A42B: HATS; HEAD COVERINGS (headbands A41D20/00; head-scarves A41D23/00) - A62B: DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING (valves specially adapted for medical use A61M39/00; life-saving devices, apparatus or methods specially adapted for use in water B63C9/00; divers' equipment B63C11/00; specially adopted for use with aircraft, e.g. parachutes, ejector seats, {B64D17/00, B64D25/10}; rescue devices peculiar to mining E21F11/00) ## Abstract A system of head protection with an integrated air filtration mechanism for protecting the user from impact/concussion and ambient air pollution. Example embodiments comprise a rigid helmet shell covering the head of the user and a fabric air barrier around the user's neck, a battery powered filtered centrifugal fan contained inside an external detachable cowl apparatus adjoins to a helmet external top spoiler with a mounting system that is easily removable to meet impact attenuation standards. The cowl apparatus directs clean filtered air into the duct system—a top spoiler funnel connected to an internal clean air duct and exits the visor air curtain providing continual clean laminar airflow between the user's face and the face shield. One or more sensors, calibrated to detect harmful particulates and a processor to automatically activate the system as a protective measure when harmful particulates are encountered and a sensor to detect when filter element needs replacement. ## Claims ### Claim 1 An apparatus comprising: (a) a helmet; (b) a connector configured to mount with an air filter; (c) an airflow system mounted with the helmet and configured to draw air from the connector and produce laminar air flow over the nose, mouth, or both of an individual wearing the helmet; and (d) a cowl detachably mounted with a rear exterior of the helmet, wherein the airflow system comprises an microprocessor control board mounted within the cowl, a centrifugal fan mounted within the cowl, a battery mounted within the cowl, and wherein the connector is configured to accept an air filter; wherein the microprocessor control board controls the operation of a centrifugal fan, the centrifugal fan forces air from the connector to produce laminar flow, and the battery supplies power to the microprocessor control board and to the centrifugal fan. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the airflow system comprises a visor air curtain, and the centrifugal fan is configured to force air from the connector through the visor air curtain. ### Claim 3 (depends on 2) The apparatus of claim 2, further comprising a neck dam mounted to a base of the helmet such that it surrounds the neck of the individual, and wherein air from the visor air curtain passes through the neck dam to the surrounding environment. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the cowl mounts with the helmet using one or more magnets. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the cowl detaches from the helmet at a predetermined impact velocity or loading conditions. ### Claim 6 (depends on 2) The apparatus of claim 2, wherein the visor air curtain comprises a T-junction that evenly distributes air across a knife edge plane formed by the visor air curtain. ### Claim 7 (depends on 2) The apparatus of claim 2, wherein the airflow system comprises a duct extending from the connector to the visor air curtain. ### Claim 8 (depends on 1) The apparatus of claim 1, wherein the cowl mounts with the rear exterior of the helmet magnetically. ### Claim 9 (depends on 2) The apparatus of claim 2, further comprising a pressure sensor mounted with the apparatus and providing a signal representative of pressure differential between the inside and outside of the airflow system. ### Claim 10 (depends on 1) The apparatus of claim 1, further comprising an air trap baffle formed in the helmet. ### Claim 11 (depends on 1) The apparatus of claim 1, further comprising an air quality sensor mounted with the apparatus and providing a signal representative of the quality of air supplied to the individual. ### Claim 12 (depends on 1) The apparatus of claim 1, wherein the microprocessor control board is configured to control the airflow system. ### Claim 13 (depends on 12) The apparatus of claim 12, wherein the microprocessor control board comprises a switch responsive to the individual and controls the airflow system responsive to the switch. ### Claim 14 (depends on 12) The apparatus of claim 12, further comprising an air quality sensor mounted with the apparatus and providing a signal representative of the quality of air supplied to the individual, and wherein the microprocessor control board controls the airflow system responsive to the air quality sensor.