A nasal mask is provided, including: a cover body, at least a part thereof made of a material having air-penetrating and air-filtering characteristics, the cover body having first and second faces which are convex and concave, the nose being received in a space defined by the second face, a periphery of the cover body defining a datum face, the cover body having a nose tip portion, a top portion and two nose wing portions, the nose tip portion located between the two nose wing portions, the top portion and the two nose wing portions being near the periphery of the cover body; a framework, fixedly connected with and along the periphery of the cover body, the framework having shape-retention characteristic to retain the cover body in a specific shaped into which the cover body is shaped.

A respirator for protecting against airborne particles includes a face gasket for providing a seal around the mouth and nose of a user, a frame attached to the gasket, a filter compression ring removably attached to the frame and a filter for filtering airborne particles from air. The filter is positioned between the frame and the filter compression ring. An eye protection accessory is attachable to the gasket. The respirator additionally includes a safety module that includes an air pressure sensor that can monitor the air pressure in the space bounded by the user's face and the filter. A processor analyzes the air pressure measurements obtained by the air pressure sensor and a vibration motor or a visual indicator. The processor can trigger the vibration motor and the visual indicator when the air pressure exceeds a predetermined threshold.

A respirator for protecting against airborne particles includes a face gasket for providing a seal around the mouth and nose of a user, a frame attached to the gasket, a filter compression ring removably attached to the frame and a filter for filtering airborne particles from air. The filter is positioned between the frame and the filter compression ring. An eye protection accessory is attachable to the gasket. The respirator additionally includes a safety module that includes an air pressure sensor that can monitor the air pressure in the space bounded by the user's face and the filter. A processor analyzes the air pressure measurements obtained by the air pressure sensor and a vibration motor or a visual indicator. The processor can trigger the vibration motor and the visual indicator when the air pressure exceeds a predetermined threshold.

A safety breathing apparatus has a sensor for measuring the difference in pressure between two point 1a, 1b in the gas delivered to a head unit 9. The sensor is used to measure the difference in the pressure of the gas supplied through the apparatus between the two points in the gas flow, and the pressure difference is then used to calculate the gas flow rate.

A safety breathing apparatus has a sensor for measuring the difference in pressure between two point 1a, 1b in the gas delivered to a head unit 9. The sensor is used to measure the difference in the pressure of the gas supplied through the apparatus between the two points in the gas flow, and the pressure difference is then used to calculate the gas flow rate.

An air/gas sampling apparatus is used to retrieve, store, and ship an air/gas sample from a high-pressure air/gas source. The air/gas sampling apparatus includes a filter housing having a filter housing inlet segment and a filter housing outlet segment. The filter housing inlet segment has an inlet orifice and defines a flow restrictor passage and is removably connected to the filter housing outlet segment, defining a filter chamber at a flow restrictor passage outlet where the filter chamber holds a filter pad. As the entirety of the air/gas sample flows into the flow restrictor passage and through the filter pad to ensure the quality of the test of the air sample, the flow restrictor passage reduces the air/gas sample flowing to the filter chamber. The filtered air/gas sample is consequently delivered to and stored in a sample bag that may be shipped to a testing facility for analysis.

An air/gas sampling apparatus is used to retrieve, store, and ship an air/gas sample from a high-pressure air/gas source. The air/gas sampling apparatus includes a filter housing having a filter housing inlet segment and a filter housing outlet segment. The filter housing inlet segment has an inlet orifice and defines a flow restrictor passage and is removably connected to the filter housing outlet segment, defining a filter chamber at a flow restrictor passage outlet where the filter chamber holds a filter pad. As the entirety of the air/gas sample flows into the flow restrictor passage and through the filter pad to ensure the quality of the test of the air sample, the flow restrictor passage reduces the air/gas sample flowing to the filter chamber. The filtered air/gas sample is consequently delivered to and stored in a sample bag that may be shipped to a testing facility for analysis.

A modular support system for a self-contained breathing apparatus, comprising: a support for a self-contained breathing apparatus, the support comprising a cylinder mount and a component mount, wherein the cylinder mount is for mounting a single cylinder of compressed gas to the support in a single cylinder configuration of the modular support system; and wherein the component mount is for mounting a functional component for the self-contained breathing apparatus in the single cylinder configuration; the system further comprising an adaptor bracket for mounting an assembly of multiple cylinders to the support in a multiple cylinder pack configuration; wherein the adaptor bracket has mount portions configured to be mounted to the component mount and the cylinder mount. There is also disclosed an adaptor bracket and a method of converting a single-cylinder support.

A modular support system for a self-contained breathing apparatus, comprising: a support for a self-contained breathing apparatus, the support comprising a cylinder mount and a component mount, wherein the cylinder mount is for mounting a single cylinder of compressed gas to the support in a single cylinder configuration of the modular support system; and wherein the component mount is for mounting a functional component for the self-contained breathing apparatus in the single cylinder configuration; the system further comprising an adaptor bracket for mounting an assembly of multiple cylinders to the support in a multiple cylinder pack configuration; wherein the adaptor bracket has mount portions configured to be mounted to the component mount and the cylinder mount. There is also disclosed an adaptor bracket and a method of converting a single-cylinder support.

A rapidly deployable, pressure sealed, cough and sneeze aerosol, containment apparatus and a system to virtually eradicate the cold, the flu, and Covid-19. A face mask having a rigid first section configured to hold a filter and a pliable second section configured to fit on a person's face; a face mask seal formed on an edge of the pliable second section of the face mask; a curved surface on the face mask seal configured to fold inward to form a seal on the person's face when pressed on the person's face.