Maskless respiratory and eye protection device for aerosols and vapors including chemical, biological, radiological, and nuclear (CBRN) contaminants

A personal respiratory and eye protection device comprising:

• a frame for accommodating a user of the respiratory and eye protection device;
• an air processing assembly comprising:
• an air processing assembly inlet for receiving ambient air;
• an air processing assembly outlet;
• at least one axial fan that is configured to generate an airflow in an inhalation zone of the user at a nose level, wherein the inhalation zone is about a 10-inch radius around the nose and mouth of the user;
• and
• at least one filter stacked together with the at least one axial fan and positioned between the air processing assembly inlet and the air processing assembly outlet in a stacking direction, wherein the air processing assembly is disposed upstream from the inhalation zone with respect to a direction of the airflow generated by the at least one axial fan in the inhalation zone, wherein the air processing assembly is in-line with the inhalation zone,
• wherein the at least one filter reduces contaminated air in the inhalation zone and comprises an aerosolized particle contamination filter configured to achieve an aerosolized particle contamination filtration efficiency of 50% or greater for particles having a size of about 1.0 μm, as measured in the inhalation zone at the nose level, wherein the aerosolized particle contamination filtration efficiency is calculated using an input from outside the inhalation zone and an output from within the inhalation zone,
• wherein substantially all air released from the air processing assembly outlet in the inhalation zone has been filtered by the at least one filter, and
• wherein the air processing assembly is coupled to the frame and processes substantially all ambient air in a direction of generated airflow by the at least one axial fan before entering the inhalation zone.

A personal respiratory and eye protection device comprising:

• a frame for accommodating a user of the respiratory and eye protection device;
• an air processing assembly comprising:
• an air processing assembly inlet for receiving ambient air;
• an air processing assembly outlet;
• at least one filter, wherein when the at least one filter is stacked together with at least one axial fan and positioned between the air processing assembly inlet and the air processing assembly outlet in a stacking direction, the at least one axial fan is configured to generate an airflow in an inhalation zone wherein the inhalation zone is about a 10-inch radius around the nose and mouth of the user, wherein the air processing assembly is disposed upstream from the inhalation zone with respect to a direction of the airflow configured to be generated by the at least one axial fan in the inhalation zone, wherein the air processing assembly is in-line with the inhalation zone,
• wherein the at least one filter reduces contaminated air in the inhalation zone and comprises an aerosolized particle contamination filter configured to achieve an aerosolized particle contamination filtration efficiency of 50% or greater for particles having a size of about 0.3 μm, as measured in the inhalation zone at the nose level, wherein the aerosolized particle contamination filtration efficiency is calculated using an input from outside the inhalation zone and an output from within the inhalation zone,
• wherein substantially all air released from the air processing assembly outlet in the inhalation zone has been filtered by the at least one filter, and
• wherein the air processing assembly is coupled to the frame and processes substantially all ambient air in a direction of the airflow configured to be generated by the at least one axial fan before entering the inhalation zone.

A personal respiratory and eye protection device comprising:

• a frame for accommodating a user of the respiratory and eye protection device;
• an air processing assembly comprising:
• an air processing assembly inlet for receiving ambient air;
• an air processing assembly outlet;
• at least one fan that is configured to generate an airflow in an inhalation zone of the user at a nose level, wherein the inhalation zone is about a 10-inch radius around the nose and mouth of the user;
• and
• at least one filter stacked together with the at least one fan and positioned between the air processing assembly inlet and the air processing assembly outlet in a stacking direction, wherein the air processing assembly is disposed upstream from the inhalation zone with respect to a direction of the airflow generated by the at least one fan in the inhalation zone, wherein the air processing assembly is in-line with the inhalation zone,
• wherein the at least one filter reduces contaminated air in the inhalation zone and comprises an aerosolized particle contamination filter configured to achieve an aerosolized particle contamination filtration efficiency of 75% or greater for particles having a size of about 0.3 μm, as measured in the inhalation zone at the nose level, wherein the aerosolized particle contamination filtration efficiency is calculated using an input from outside the inhalation zone and an output from within the inhalation zone,
• wherein the aerosolized particle contamination filter comprises at least one pleat,
• wherein substantially all air released from the air processing assembly outlet in the inhalation zone has been filtered by the at least one filter,
• wherein the air processing assembly is coupled to the frame and processes substantially all ambient air in the direction of generated airflow by the at least one fan before entering the inhalation zone.