In some examples, a dual mode respirator comprises a face piece; an inhalation port; an exhalation port; and a port closure movable to close the exhalation port and switch the dual mode respirator from a source control mode to a free exhalation mode of the dual mode respirator.

A personal ventilation device and method include a first duct segment and a second duct segment both held by a support structure that is configured to be mounted on a wearer of the personal ventilation device. The personal ventilation device also includes a first nozzle mounted to the first duct segment and a second nozzle mounted to the second duct segment. The first and second nozzles are configured to be disposed proximate to opposite sides of a face of the wearer and the first nozzle directs airflow from the first duct segment across the face of the wearer to form a control volume for a breathing space of the wearer.

A personal ventilation device and method include a first duct segment and a second duct segment both held by a support structure that is configured to be mounted on a wearer of the personal ventilation device. The personal ventilation device also includes a first nozzle mounted to the first duct segment and a second nozzle mounted to the second duct segment. The first and second nozzles are configured to be disposed proximate to opposite sides of a face of the wearer and the first nozzle directs airflow from the first duct segment across the face of the wearer to form a control volume for a breathing space of the wearer.

Devices and methods for delivering and circulating air within an air pocket between a face covering and the face of an individual wearing the face covering. The device has an air inlet, an air outlet, and a passage therebetween that fluidically couples the air inlet and outlets, a filter configured to filter air passing through the passage between the air inlet and the air outlet, a fastener configured to releasably secure the device to the face covering such that the air inlet is located outside of the air pocket and exposed to atmospheric air and the air outlet is located within the air pocket, and an air transport system configured to force air from the atmospheric air to flow into the air inlet, through the filter, and out of the air outlet into the air pocket.

Devices and methods for delivering and circulating air within an air pocket between a face covering and the face of an individual wearing the face covering. The device has an air inlet, an air outlet, and a passage therebetween that fluidically couples the air inlet and outlets, a filter configured to filter air passing through the passage between the air inlet and the air outlet, a fastener configured to releasably secure the device to the face covering such that the air inlet is located outside of the air pocket and exposed to atmospheric air and the air outlet is located within the air pocket, and an air transport system configured to force air from the atmospheric air to flow into the air inlet, through the filter, and out of the air outlet into the air pocket.

The present invention is an adaptor for connecting a pressurized gas, such as an oxygen supply, to two different outlets, with each outlet connected to a different gas delivery device. Gas delivery devices include, but are not limited to a nasal cannula, a c-pap machine, a bi-pap machine, a bubbler, or a nebulizer. The adaptor is provided with a valve located within the adaptor that can be used to direct the gas from the gas supply selectively to one of the two different outlets, or alternately, to both outlets at the same time.

The present invention is an adaptor for connecting a pressurized gas, such as an oxygen supply, to two different outlets, with each outlet connected to a different gas delivery device. Gas delivery devices include, but are not limited to a nasal cannula, a c-pap machine, a bi-pap machine, a bubbler, or a nebulizer. The adaptor is provided with a valve located within the adaptor that can be used to direct the gas from the gas supply selectively to one of the two different outlets, or alternately, to both outlets at the same time.

There is provided a respirator for supplying clean air for a wearer. The respirator comprises a face assembly comprising an oronasal mask configured to seal against and cover a nose region and a mouth region of the wearer. The face assembly may be configured to be interchangeable on the respirator between a half-face assembly and a full-face assembly. The respirator comprises a securing headgear releasably securable with the face assembly, the securing headgear assembly configured to secure the respirator on a head of the wearer. The respirator comprises a facepiece assembly for supplying the wearer with air for inhaling and releasing air exhaled by the wear, the facepiece assembly releasably securable with the face assembly. One or more of the face assembly, the facepiece assembly, or the securing headgear are configured to be released from the respirator, sterilized, and releasably resecured with the respirator.

Aspects of various embodiments herein may be implemented as follows. An apparatus has a material shell, which may be conformed to a user's face, and a securing portion connected to the shell that may operate to secure a filter, such as to the user's face with the filter covering the user's nose and mouth. An adjustable valve is coupled to the filter and operable for providing adjustable air flow through the valve (e.g., selectively bypassing air flow through material of the filter). A securing force can be applied to the material shell, thereby sealing the shell around the user's nose and mouth. Various implementations involve multiple couplers at an attachment region between the material shell and securing portion, which facilitate the application of forces with two or more degrees of freedom for securing to the user's face. Further, various implementations facilitate replacing filters utilized with the mask shell.

A respiratory protection mask includes detachably connected main body and front cover. The main body includes a shielding member for shielding a wearer's mouth and nose, and has air outlet with air-outlet valve and air inlets with air-inlet valves. The mask is characterized in a guide structure and a limiting structure provided between the main body and the front cover. The guide structure includes corresponding slide rail and slide channel capable of guiding the front cover to move along a linear path parallel to a longitudinal section of the air outlet to assemble to the main body and cover the air-outlet valve. The limiting structure includes corresponding male and female fasteners that are detachably engaged with each other when the front cover is assembled to the main body, preventing the front cover from moving in an opposite direction on the linear path to separate from the main body.