An air filtration device for protection including a securing structure for securing to a user's head; a visor associated with the securing structure; a hood fixed thereto defining a closed chamber; a rear air inlet comprising an inlet filter; an air outlet; and a fan for generating an air flow from the air inlet through an upper air duct and through a front portion of the closed chamber to the air outlet. The air outlet is arranged on one side and comprises an outlet filter, a side frame and a side cover. The outlet filter is fixed between the side frame and the side cover.

A head covering air filtering device containing a rigid component including a transparent face shield, a fabric component, wherein the rigid component and the fabric component combine to cover an entire head of a user and form a seal around the user's neck. The device further includes an intake filter to filter all intake air entering the device, an exhaust filter to filter all exhaust air exiting the device, and an air mover causing intake air to enter the device and exhaust air to exit the device.

The invention relates to respirator technology, in particular to an adaptive auxiliary air supply respirator and a control method thereof. The respirator comprises: a sealing face shield covering the area of the mouth and nose, an internal chamber being formed within the sealing face shield; an exhalation valve connected to the sealing face shield, communicating with the internal chamber, and configured to open unidirectionally during exhalation; an intake chamber located inside the sealing face shield and equipped with an inhalation valve which opens unidirectionally during inhalation; a filter mounted on the sealing face shield and communicating with the intake chamber; and an auxiliary air supply mechanism comprising a fan extending into the intake chamber, a controller for controlling a speed of the fan, and a sensor arranged inside the sealing face shield. The fan draws external air, accelerating during inhalation and decelerating during exhalation, improving user experience.

Described herein are embodiments directed to a particle repelling helmet having particle mitigation system that keeps dust particles from going into the interior of the helmet. The helmet comprises a face vent that provides an unobstructed pathway between an external environment and a wearer's eyes, nose and mouth. A spacer arrangement connected to an inner side of the helmet provides a channel between the wearer's head and the inner helmet side. A fan blows air through the helmet, across the wearer's head and out the face vent and head receiving opening in the bottom of the helmet. Electrodes disposed along the edge of the face vent produce an electrostatic barrier that spans the face vent thereby further preventing charged dust from going into the helmet. The helmet can also comprise an ionizer that generates ions, which charges neutral dust particles that can be blocked by the barrier.

A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user's head, with an upper portion above the user's head and a lower portion proximate to and spaced apart from the user's chin, an intake aperture formed in the frame, and an intake air filter covering the intake aperture. The device includes an air mover chamber attached with an air-tight seal to an inside surface of the frame and communicating on one end with the intake air filter and communicating on another end with a filtered air supply inlet inside the device and an air mover disposed within the air mover chamber and configured to draw air through the intake air filter and push air out the filtered air supply inlet. The device also includes an exhaust aperture formed in the frame and an exhaust air filter covering the exhaust aperture. The device further includes a transparent face shield attached with an air-tight seal to a front surface of the frame, the shield providing a space for air between an inside surface of the face shield and the user's face, and a fabric component comprising a first portion that is air permeable configured to cover the frame and filters and a second portion that is air impermeable extending from a back surface of the frame to cover a remaining portion of the user's head and encircle the user's neck.

A device for filtering air for a user comprising a frame formed in a generally oval-shaped band, the band encircling the user's head, with an upper portion above the user's head and a lower portion proximate to and spaced apart from the user's chin, an intake aperture formed in the frame, and an intake air filter covering the intake aperture. The device includes an air mover chamber attached with an air-tight seal to an inside surface of the frame and communicating on one end with the intake air filter and communicating on another end with a filtered air supply inlet inside the device and an air mover disposed within the air mover chamber and configured to draw air through the intake air filter and push air out the filtered air supply inlet. The device also includes an exhaust aperture formed in the frame and an exhaust air filter covering the exhaust aperture. The device further includes a transparent face shield attached with an air-tight seal to a front surface of the frame, the shield providing a space for air between an inside surface of the face shield and the user's face, and a fabric component, at least a portion of which is air impermeable and extends from a back surface of the frame to cover a remaining portion of the user's head and encircle the user's neck.

The invention relates to respirator technology, in particular to an adaptive auxiliary air supply respirator and a control method thereof. The respirator comprises: a sealing face shield covering the area of the mouth and nose, an internal chamber being formed within the sealing face shield; an exhalation valve connected to the sealing face shield, communicating with the internal chamber, and configured to open unidirectionally during exhalation; an intake chamber located inside the sealing face shield and equipped with an inhalation valve which opens unidirectionally during inhalation; a filter mounted on the sealing face shield and communicating with the intake chamber; and an auxiliary air supply mechanism comprising a fan extending into the intake chamber, a controller for controlling a speed of the fan, and a sensor arranged inside the sealing face shield. The fan draws external air, accelerating during inhalation and decelerating during exhalation, improving user experience.

There is provided an apparatus configured to enclose a volume of air around a user's head, wherein the apparatus is configured to rest on top of the head, extend past the face and sides of the head and seal around the user's neck. The apparatus includes a first assembly including a rigid holding member and a stretchable seal, wherein the seal extends from the rigid holding member and is configured to seal against the periphery of the user's neck. The apparatus further includes a second assembly including a rigid body and a rigid cap, wherein the rigid body is configured to mate with and seal against the rigid holding member of the first assembly, wherein the second assembly further includes a transparent visor that is held by the rigid body and configured to reveal the user's visage. The rigid body of the second assembly is configured to extend from the rigid holding member, around the sides and rear of the user's head, and upwards to the rigid cap, which is configured to rest on top of the user's head and carry the apparatus in use. The apparatus further includes at least one air inlet configured to permit air to travel into an interior volume of the apparatus. The apparatus further includes at least one inlet valve configured to open and allow air to travel into the interior volume upon inhalation of a user's breath. The apparatus further includes at least one outlet valve configured to open and allow air to travel out of the interior volume upon exhalation of a user's breath. The apparatus further includes a filter device that is connected to the rigid cap, and includes a filter configured to collect, neutralize, kill (or inactivate) pathogens travelling in an airflow through it. The apparatus is configured such that air travelling into the interior volume from the external environment during normal breathing has to travel through the air inlet and the filter, and air exiting the interior volume to the external environment during normal breathing has to travel via the outlet valve.

Hood assemblies with disposable hoods are provided. In one implementation, a single-use, disposable hood includes a hood material sized to extend over a user's head and down to a neck/shoulder region of the user. The hood material includes a face shield opening extending through the hood material, a lower edge extending along a lower periphery of the hood material, and an air inlet hole through the hood material. The hood further includes an air inlet structure surrounding the air inlet hole, the air inlet structure having a base structure shaped as a truncated cone and a base aperture substantially aligned with the air inlet hole. The air inlet structure further includes an extension structure extending outward from the base structure, the extension structure having multiple vertical extensions arranged substantially perpendicular to the base structure and a ring structure attached to opposite ends of the vertical extensions from the base structure.

Air purifying respirator for user's having a face shield configured to shield the user's face from splatter, a head strap configured to encircle at least a portion of the users head, said head strap configured to support the face shield, at least one fan, and a fan housing positioned proximate an upper edge of the face shield, said fan housing configured to support said fan, a filter media positioned on an outer perimeter flange of the fan housing to maximizing a surface area of said filter media, a face shroud connected to a perimeter of the face shield, the face shroud configured to provide a seal between the face shield and the user's face and thus, to facilitate pulling the air through the filter media, and the fan pushes the filtered air from said fan housing to the user between said face shield and the user's face.