A removable mask airflow device, comprising a first portion constructed and arranged to be positioned at an exterior surface of a facemask, the first portion comprising an opening and at least one flow processing device disposed at the opening and a second portion constructed and arranged to be positioned at an interior surface of the facemask. The at least one flow processing device is configured to process fluid flow through the opening. The second portion is constructed and arranged to couple with the first portion with a portion of the facemask being between the first portion and the second portion.

A device for covering the head of a user comprising a rigid component comprising a transparent face shield and an air port, a fabric component, wherein the rigid component and the fabric component combine to cover the head of the user and seal around the neck of the user, and an air mover mounted on the rigid component so as to cause air to move either into or out of the air port, a filter that filters air moving through the air port, wherein at least a portion of the fabric component allows air to either move into the device if the air mover moves air out of the air port or move out of the device if the air mover moves air into the air port, and wherein the at least a portion of the fabric allows air to move into or out of the device also filters the air moving into or out of the device.

A device for filtering air, a rigid component comprising a transparent face shield, a fabric component, wherein the fabric component and the rigid component combine to cover an entire head of a user and form a seal around the user's neck, an intake port, an intake filter that filters intake air passing through the inlet port, an exhaust port, an exhaust filter that filters exhaust air passing through the outlet port, an air mover positioned to pull air through the exhaust port, whereby intake air is drawn into the device through the inlet port and whereby the intake air and exhaust air is filtered.

A head covering device comprising a rigid component comprising a transparent face shield, a fabric component, wherein the face shield and fabric combine to cover an entire head of a user and form a seal around the user's neck, an intake port with an inlet filter, an exhaust port with an exhaust filter, an air mover causing filtered air to enter the intake port and exhaust air to exit the exhaust port, and an environmental control component to condition air within the device.

A compact, mask-mountable powered air purifying respirator (“PAPR”) includes a housing and an impeller driven by a motor to draw air in through an inlet in the housing and direct the air to an outlet at an opposite end of the housing. The impeller comprises S-shaped fan blades that direct the air radially outward from the bottom of the impeller. The radial airflow meets S-shaped fins on a flow straightener that redirect the airflow downward through the PAPR housing outlet. The fan blades and flow straightener drive the airflow directly and efficiently, without unnecessary travel of air through the PAPR assembly, thus providing an improved airflow efficiency.

An air mask is applied for a user to wear and includes a wearable main body, an airflow generator and a face shield. The wearable main body has a front part and a rear part and includes an airflow channel, an air inputting port disposed on the rear part, and an air outputting port disposed on the front part. The airflow generator is coupled to the air inputting port and configured for generating and guiding airflow to the airflow channel. The face shield is coupled to the front part of the wearable main body and has an air chamber communicated with the air outputting port. When the user wears the air mask, the air inputting port is located on rear head of the user, the air outputting port is located on forehead of the user, and the airflow flows downward from the forehead of the user to the air chamber.

There is provided a method of controlling a powered air purifying respirator blower system to deliver a substantially uniform volumetric airflow to a user, the system comprising a fan powered by a battery in communication with a variable speed electric motor, the variable speed electric motor is controlled by an electronic control unit for delivering a forced flow of air through at least one filter to a user, comprising the steps of: (a) determining an estimated system run time by summing a battery run time remaining and a system run time; and (b) altering a speed of the variable speed electric motor when the estimated system run time is equal to or less than a desired system run time.

A surgical protection system to define a barrier between the user and the external environment. The surgical protection system comprising a helmet assembly, a hood and a transparent face shield. The helmet including a shell, a face frame coupled to the shell, a static tab, a first fastener disposed on the face frame; and a fan mounted to the shell and configured to circulate air about the user. The hood may include a first material defining an opening. The shield may be formed from flexible material and disposed within the opening of the hood. The shield may further include a tab extending from a top portion of the shield and define an opening configured to receive the static tab of the helmet to align the shield to the helmet. The first fastener disposed on the face frame may be configured to facilitate removable attachment of the shield to the helmet.

A respirator comprising: an air supply unit arranged to deliver air at its output; headgear comprising a cradle for interfacing with a user's head, and a face covering from within which the user breathes; a tube to receive air from the air supply unit; and an interface component to receive aft from the tube and to deliver said air within the face covering. Components of the respirator and related methods are also described.

A personal protective device (PPE) comprising a face cover assembly and a bodysuit configured to be worn by a human user. The device protects users against airborne aerosol particles containing viruses or other infectious agents while enabling improved flexibility relative to prior art designs. The device includes a helmet-like” rotating face cover assembly that fits over the user's head and attaches to a collar on the biohazard bodysuit. This rotating face cover assembly has a plurality of different mask sides, each with differing geometries or other properties. The device enables a user to rotate (either manually or by electric motor) the masks and select a given mask side that best meets that user's needs. The different mask sides can accommodate different facial geometries, eyewear types, and use cases, such as operation in more hostile environments. Features to improve user comfort, including alternate bodysuit designs, moisture reduction, and cooling are disclosed.