# US 2021/0274876 A1 · Filter mask > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0274876 A1 - Document ID: US20210274876A1 - Status: Published application - Kind: A1 - Application number: 16/913,885 - Filed: 2020-06-26 - Published: 2021-09-09 - Earliest claimed: 2020-03-09 - Assignees: Omachron Intellectual Property Inc. - Applicants: Omachron Intellectual Property Inc. - Inventors: Wayne Ernest Conrad - Web page: https://patentgrep.com/patent/US20210274876A1 ## CPC - A42B 3/22: Visors - A62B 18/02: Masks (gas-masks for animals A62B18/06; masks for welders A61F9/06) - A41D 13/1107: {characterised by their shape} - A41D 13/1184: {with protection for the eyes, e.g. using shield or visor} - A42B 3/286: {with forced flow, e.g. by a fan} - A62B 18/006: {with pumps for forced ventilation (A62B18/045 takes precedence)} - A62B 18/025: {Halfmasks (A62B23/02 takes precedence; surgical face masks A41D13/11)} - A62B 23/02: for respirators - A62B 23/025: {the filter having substantially the shape of a mask (surgical face masks A41D13/11)} - A62B 18/08: Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices (eye-pieces for protective goggles A61F9/02; composition of materials for the windows or other transparent parts A62D7/00) - A62B 18/084: {Means for fastening gas-masks to heads or helmets} - A62B 18/10: Valves - 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) - A41D: OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES ## Abstract A filter mask for biological material is provided wherein the filter mask has a fan assist for inhalation. ## Claims ### Claim 1 A filter mask comprising: (a) a mask body which, when worn by a user, abuts the face of the user and covers the mouth and nose of the user; and (b) a filter assembly that is suitable for having a filter media housed therein, the filter assembly having a port for airflow therethrough, wherein a first fan is provided downstream of the port in a direction of flow of air during inhalation and the first fan comprises a motor and a propeller. ### Claim 2 (depends on 1) The filter mask of claim 1 wherein the port is used for inhalation and exhalation whereby air travels past the first fan during both inhalation and exhalation. ### Claim 3 (depends on 1) The filter mask of claim 1 wherein the filter mask has an inhalation passage and an exhalation passage and the first fan is provided in the inhalation passage. ### Claim 4 (depends on 3) The filter mask of claim 3 wherein a second fan is provided in the exhalation passage. ### Claim 5 (depends on 1) The filter mask of claim 1 wherein the filter media is provided in a filter cartridge, the filter cartridge has an inhalation side and an exhalation side and the first fan is provided on the inhalation side. ### Claim 6 (depends on 1) The filter mask of claim 1 wherein the first fan produces an air flow of 6 to 18 liters/minute. ### Claim 7 (depends on 1) The filter mask of claim 1 further comprising an energy storage member operably connected to the fan and the energy storage member is rechargeable while positioned in the filter mask. ### Claim 8 (depends on 7) The filter mask of claim 7 wherein the filter mask has a charging port. ### Claim 9 (depends on 1) The filter mask of claim 1 wherein the filter media comprises a HEPA filter media. ### Claim 10 (depends on 1) The filter mask of claim 1 wherein the filter media is provided in a filter cartridge, the filter cartridge has first and second opposed sides and walls extending between the opposed sides wherein the walls and opposed sides define a cavity in which the filter media is positioned, the first opposed side has a first port for air flow therethrough, the second opposed side has a second side surface having a second port for air flow therethrough wherein, during inhalation, air travels from the first port, through the filter media and through the second port, the fan is provided downstream of the second port and the second port is provided on only one end of the second side surface. ### Claim 11 (depends on 9) The filter mask of claim 9 wherein the second port occupies less than 50% of the second side. ### Claim 12 (depends on 11) The filter mask of claim 11 wherein the first side is open and comprises the first port. ### Claim 13 (depends on 9) The filter mask of claim 9 wherein, during inhalation, the cavity has a downstream side and the downstream side of the cavity includes a header. ### Claim 14 (depends on 13) The filter mask of claim 13 wherein the header is positioned between the filter media and the second side surface. ### Claim 15 A filter mask comprising: (a) a mask body which, when worn by a user, abuts the face of the user and covers the mouth and nose of the user; and, (b) a filter assembly that is suitable for having a filter media housed therein, wherein the filter mask has an inhalation passage and an exhalation passage, the filter media is provided in the inhalation passage and a first fan is provided in the inhalation passage. ### Claim 16 (depends on 15) The filter mask of claim 15 wherein the filter media is also provided in the exhalation passage and a second fan is provided in the exhalation passage. ### Claim 17 (depends on 15) The filter mask of claim 15 further comprising an energy storage member operable connected to the fan and the energy storage member is rechargeable while positioned in the filter mask. ### Claim 18 A filter mask comprising: (a) a mask body which, when worn by a user, abuts the face of the user and covers the mouth and nose of the user; (b) a filter cartridge having first and second opposed sides and walls extending between the opposed sides wherein the walls and opposed sides define a cavity in which the filter media is positioned, the first opposed side has a first port for air flow therethrough, the second opposed side has a second side surface having a second port for air flow therethrough wherein, during inhalation, air travels from the first port, through the filter media and through the second port; and, (c) a fan provided downstream of the second port wherein the second port is provided on only one end of the second side surface such that the second port occupies less than 50% of the second side. ### Claim 19 (depends on 18) The filter mask of claim 18 wherein the first side is open and comprises the first port. ### Claim 20 (depends on 19) The filter mask of claim 19 wherein, during inhalation, the cavity has a downstream side and the downstream side of the cavity includes a header that is positioned between the filter media and the second side surface.