An air management system for a common indoor room or space that comprises a plurality of air outflow apertures or vents, a plurality of air curtains having at least a portion of the air curtains separated from one another, a plurality of separated air suction intakes, and an air sterilization and/or air cleaning mechanism.

An air purification unit and/or system for an environment with multiple seated individuals, including an air collector and air purification chamber, to be used independently from or in conjunction with the environment's air handling system.

Air cleaner assemblies, related methods, components therefor, and features thereof are described. In depicted examples, the air cleaner assemblies and components optionally use advantageous housing seal features. In some examples, a filter cartridge for an air cleaner includes a media pack extending along a longitudinal axis between opposite inlet and outlet flow ends and defining an outer perimeter with opposite straight sides and a first curved end. The filter cartridge can include a seal arrangement circumscribing the media pack outer perimeter, wherein a portion of the seal arrangement extends beyond a first plane defined by the media pack outlet flow end and a portion of the seal arrangement is disposed between the first plane and a second plane defined by the media pack inlet flow end, wherein the seal arrangement is aligned along a third plane disposed at an oblique angle to the first and second planes.

A powered air purifying respirator includes an inlet air filter; a flow generator configured to cause air from an ambient environment to flow through the inlet air filter and elevate pressure of the air to above ambient conditions; a mask in fluid communication with the flow generator and configured to fit tightly against a user's face or neck for delivery of the air to the user at the elevated pressure; and a one-way outlet valve configured to allow air exhaled by the user to be vented to the ambient environment. An outlet filter may be included to filter the air flowing through the one-way valve, and the outlet filter may be retrofit. The outlet filter may be preferred when filtration of both inlet and outlet air is desirable.

A filter cartridge assembly is disclosed, which includes a housing having a reservoir for collecting fluids entering the housing through a gas return path, a sensor located within the reservoir for detecting a fluid level therein, and a backer plate positioned within the housing adjacent an inlet port to the reservoir and including fluid management structure to shield the sensor from fluid entering the reservoir from the gas return path through the inlet port and causing a false indication of the fluid level in the reservoir.

An apparatus and method are provided for a cone air filter for a closed intake system of an internal combustion engine. The cone air filter is comprised of a cone-shaped filter medium, retained between a base and a cap, that is fabricated to remove contaminants and particulate matter from an intake airstream. The base is comprised of a flange that couples with an air intake duct of the internal combustion engine. A shell receiver is incorporated into the base and receives a rigid exterior shell, such that the exterior shell surrounds the cone air filter and directs the intake airstream therein. A cap is disposed on an apex portion of the cone air filter and is configured to direct the intake airstream around the apex portion and into the cone-shaped filter medium.

A handheld vacuum cleaner (1) comprising a vacuum cleaner housing (2), a handle (3) connected to the vacuum cleaner housing (2), an intake head (4) through which outside air can be drawn in by the handheld vacuum cleaner (1), at least one exhaust port (5) through which the cleaned air can exit the handheld vacuum cleaner (1), an airflow circuit (6) that extends between the intake head (4) and the exhaust port (5), a suction unit (7) fitted on the airflow circuit (6), the suction unit (7) comprising an electric motor (7.1) and a fan (7.2) coupled to the electric motor (7.1) to generate an air flow in the airflow circuit (6) from the intake head (4) to the exhaust port (5), a waste separation device (8) fitted on the airflow circuit (6) upstream of the suction unit (7) and through which the air flow generated by the fan (7.2) passes when the handheld vacuum cleaner (1) is being operated, a removable tank (9) for receiving the waste separated by the waste separation device (8) and which is removably attached to the vacuum cleaner housing (2), a removable filter (14) arranged in the airflow circuit (6), the removable filter (14) being housed in a filter chamber (15) of the handheld vacuum cleaner (1), the filter chamber (15) being formed at least in part in the vacuum cleaner housing (2) and being arranged at least in part between the suction unit (7) and a wall of the vacuum cleaner housing (2). The filter chamber (15) comprises an access opening (15.1) to the removable filter (14) [sic] for accessing the removable filter (14) when the removable tank (9) has been detached from the vacuum cleaner housing (2).

The present disclosure provides a personal smoke filter device which comprises a pre-filter element position between the air intake and the filter portion, the pre-filter element being configured to absorb and/or repel moisture in the airflow passing through the device. Additionally, the disclosed personal filter device may be provided with a removable lid to facilitate regular drying of the contents of the smoke filter device. Also provided herein is a specially adapted HEPA filter design for resisting moisture absorption.

An elevator air filtration system having an elevator car, an outdoor intake HEPA air filtration system that creates HEPA filtered air at a desired temperature, humidity and quantity of filtered outdoor air, and a retractable hose system that delivers the HEPA filtered air to the elevator car.

A filter connection for a smoke evacuation device includes a filter canister assembly and a socket. The filter canister assembly has a cross-sectional shape with only one line of symmetry that corresponds to a cross-sectional shape of the socket so that the filter canister can only be inserted into the socket in one orientation. One or more key notches on the filter canister may also ensure that the filter is properly installed. A seal creates an airtight boundary between the filter canister and a recess of the socket so that a sealed path in communication with the smoke evacuation device is established before the filter canister is fully inserted into the socket. An electronic connection is made between the filter canister and the socket after the airtight boundary is created.