Abstract: An SCBA harness including a backframe and a reducer mounted on the lower end of the backframe. A delivery hose that is connected to a mask-mountable regulator, and a high-pressure gauge hose that is connected to a pressure gauge, are respectively connected to a primary air-delivery outlet of the reducer and to a high-pressure gauge air outlet of the reducer. The primary air-delivery outlet defines a first hose-end direction along which a first end of the delivery hose is oriented, and the high-pressure gauge air outlet defines a second hose-end direction along which a first end of the high-pressure gauge hose is oriented. The first and second hose-end directions are each oriented upward, at an included angle of from 20 to 70 degrees relative to a vertical axis of the backframe, and are oriented at an angle of from 40 to 140 degrees relative to each other.

Abstract: Blowers with variable nozzles are provided. A blower includes a fan, and a main body housing the fan, the main body defining an airflow path extending between an inlet end and an outlet end. A blower further includes a variable nozzle disposed at the outlet end. The variable nozzle includes an attachment collar, the attachment collar comprising a body defining an exterior surface and an interior surface and extending along a longitudinal axis. The variable nozzle further includes a plurality of air control bodies, each of the plurality of air control bodies movably connected to the attachment collar and comprising an air control surface and an extension rod. The variable nozzle further includes an adjustment collar, the adjustment collar disposed around the attachment collar and defining a plurality of adjustment channels, wherein each of the plurality of extension rods is disposed in one of the plurality of adjustment channels.

Abstract: Blowers with variable nozzles are provided. A blower includes a fan, and a main body housing the fan, the main body defining an airflow path extending between an inlet end and an outlet end. A blower further includes a variable nozzle disposed at the outlet end. The variable nozzle includes an attachment collar, the attachment collar comprising a body defining an exterior surface and an interior surface and extending along a longitudinal axis. The variable nozzle further includes a plurality of air control bodies, each of the plurality of air control bodies movably connected to the attachment collar and comprising an air control surface and an extension rod. The variable nozzle further includes an adjustment collar, the adjustment collar disposed around the attachment collar and defining a plurality of adjustment channels, wherein each of the plurality of extension rods is disposed in one of the plurality of adjustment channels.

Abstract: A respiratory inlet having a mask end and a fitting end is provided. The respiratory inlet also includes a cavity and an exterior mating surface. The exterior mating surface is disposed proximate the fitting end, and is configured to matingly accept a first type of air supply fitting. The first type of air supply fitting is configured as a female fitting, and the respiratory inlet is configured to operate in a first mode when the female fitting is mated to the exterior mating surface. The cavity includes an opening oriented toward the fitting end, and an interior mating surface configured to matingly accept a second type of air supply fitting. The second type of air supply fitting is configured as a male fitting, and the respiratory inlet is configured to operate in a second mode when the male fitting is mated to the interior mating surface.

Abstract: A configurable exhale system for a respirator has a first valve assembly disposed within a chamber which is configured to prevent air from flowing through the first valve assembly when an air pressure differential between an upstream side and a downstream side of the first valve assembly is below a first opening pressure. A second valve assembly is disposed within the chamber in fluid communication with the first valve assembly which is configured to prevent air from flowing through the second valve assembly when an air pressure differential between an upstream side and a downstream side of the second valve assembly is below a second opening pressure, which is greater than the first opening pressure. A bypass opening is positioned adjacent the second valve assembly configured to enable air to bypass the second valve assembly with a bypass member positioned adjacent to the bypass opening.

Abstract: An exhale valve assembly includes a housing, a valve carrier body, a primary valve assembly, a plunger, a lock assembly, and an air pressure activated actuator assembly. The valve carrier body is disposed the housing and has a passageway. The primary valve assembly is mounted to the valve carrier body. A first air flow path passes through the passageway and a second air flow path passes through the primary valve assembly. The plunger is configured to permit a flow through the first air flow path when the plunger is in a first position and to direct a flow through the second air flow path when the plunger is in a second position. The lock assembly is configured to secure the plunger in the first position. The air pressure activated actuator assembly is configured to release the lock responsive to a pressure change within the cavity of the housing.

Abstract: A mounting assembly for a self-contained breathing apparatus (SCBA) includes a back plate defining a plurality of apertures therethrough arranged in first and second columns. The apertures in the columns are sized and spaced to receive corresponding first and second mounting straps woven therethrough that are configured to extend around webbing straps of a carrying jacket to fasten the back plate to the carrying jacket. The back plate includes a first press stud associated with the first column and a second press stud associated with the second column, which are configured to engage ends of the respective first and second mounting straps to releasably secure the mounting straps to the back plate. A tank securing strap on the back plate releasably fastens a supply tank to the back plate. A valve retaining mount on the back plate releasably secures an air supply valve for engagement with the supply tank.

Abstract: A mounting assembly for a self-contained breathing apparatus (SCBA) includes a back plate defining a plurality of apertures therein that are arranged in two columns extending down opposing side edges of the back plate. The apertures are sized and spaced to receive mounting straps that are configured to interface with webbing straps of a carrying jacket to fasten the back plate to the jacket. The mounting assembly also includes a tank securing strap with a quick release mechanism that is fastened to the back plate. The tank securing strap is configured to engage a supply tank to releasably fasten the tank to the back plate. The mounting assembly further includes a valve retaining mount disposed on the plate. The valve retaining mount is configured to releasably secure an air supply valve to the back plate for engagement with the supply tank.

Abstract: A mounting assembly for a self-contained breathing apparatus (SCBA) includes a back plate defining a plurality of apertures therethrough arranged in first and second columns. The apertures in the columns are sized and spaced to receive corresponding first and second mounting straps woven therethrough that are configured to extend around webbing straps of a carrying jacket to fasten the back plate to the carrying jacket. The back plate includes a first press stud associated with the first column and a second press stud associated with the second column, which are configured to engage ends of the respective first and second mounting straps to releasably secure the mounting straps to the back plate. A tank securing strap on the back plate releasably fastens a supply tank to the back plate. A valve retaining mount on the back plate releasably secures an air supply valve for engagement with the supply tank.

Abstract: A respiratory inlet having a mask end and a fitting end is provided. The respiratory inlet also includes a cavity and an exterior mating surface. The exterior mating surface is disposed proximate the fitting end, and is configured to matingly accept a first type of air supply fitting. The first type of air supply fitting is configured as a female fitting, and the respiratory inlet is configured to operate in a first mode when the female fitting is mated to the exterior mating surface. The cavity includes an opening oriented toward the fitting end, and an interior mating surface configured to matingly accept a second type of air supply fitting. The second type of air supply fitting is configured as a male fitting, and the respiratory inlet is configured to operate in a second mode when the male fitting is mated to the interior mating surface.

Abstract: An exhale valve assembly includes a housing, a valve carrier body, a primary valve assembly, a plunger, a lock assembly, and an air pressure activated actuator assembly. The valve carrier body is disposed the housing and has a passageway. The primary valve assembly is mounted to the valve carrier body. A first air flow path passes through the passageway and a second air flow path passes through the primary valve assembly. The plunger is configured to permit a flow through the first air flow path when the plunger is in a first position and to direct a flow through the second air flow path when the plunger is in a second position. The lock assembly is configured to secure the plunger in the first position. The air pressure activated actuator assembly is configured to release the lock responsive to a pressure change within the cavity of the housing.

Abstract: A configurable exhale system for a respirator has a first valve assembly disposed within a chamber which is configured to prevent air from flowing through the first valve assembly when an air pressure differential between an upstream side and a downstream side of the first valve assembly is below a first opening pressure. A second valve assembly is disposed within the chamber in fluid communication with the first valve assembly which is configured to prevent air from flowing through the second valve assembly when an air pressure differential between an upstream side and a downstream side of the second valve assembly is below a second opening pressure, which is greater than the first opening pressure. A bypass opening is positioned adjacent the second valve assembly configured to enable air to bypass the second valve assembly with a bypass member positioned adjacent to the bypass opening.

Abstract: A mounting assembly for a self-contained breathing apparatus (SCBA) includes a back plate defining a plurality of apertures therein that are arranged in two columns extending down opposing side edges of the back plate. The apertures are sized and spaced to receive mounting straps that are configured to interface with webbing straps of a carrying jacket to fasten the back plate to the jacket. The mounting assembly also includes a tank securing strap with a quick release mechanism that is fastened to the back plate. The tank securing strap is configured to engage a supply tank to releasably fasten the tank to the back plate. The mounting assembly further includes a valve retaining mount disposed on the plate. The valve retaining mount is configured to releasably secure an air supply valve to the back plate for engagement with the supply tank.