Disclosed herein are connection apparatus for connecting breathing gas delivery components of a breathing apparatus. The connection apparatus comprises a male connector configured to be received in a corresponding female port, the male connector comprising a perimeter wall defining an external shape of the male connector. In some examples, the male connector defines an insertion axis along which the male connector is receivable into a corresponding female port, and a distal edge of the perimeter wall defines a distal face of the perimeter wall and at least a portion of the distal face is inclined with respect to the insertion axis of the male connector. In some examples, the perimeter wall comprises first and second wall portions which taper together such that a first edge of the first wall portion and a first edge of the second wall portion are connected at an apex portion.

Proposed is a transparent mask equipped with an oxygen supply means, wherein the transparent mask includes a transparent member configured to be worn on a face and to cover a nose and a mouth, a coupling member configured to enable a periphery of the transparent member to be brought in close contact with the face, an air inflow port provided on one side of the transparent member and configured to allow air to be introduced into an inside of the transparent member, air discharge port provided on an opposite side of the transparent member and configured to allow air to be discharged to an outside of the transparent member, and an air discharge means provided in the air discharge port, wherein the air discharge means includes a discharge flap configured only to allow such that air is discharged to the outside of the transparent member.

Proposed is a transparent mask equipped with an oxygen supply means, wherein the transparent mask includes a transparent member configured to be worn on a face and to cover a nose and a mouth, a coupling member configured to enable a periphery of the transparent member to be brought in close contact with the face, an air inflow port provided on one side of the transparent member and configured to allow air to be introduced into an inside of the transparent member, air discharge port provided on an opposite side of the transparent member and configured to allow air to be discharged to an outside of the transparent member, and an air discharge means provided in the air discharge port, wherein the air discharge means includes a discharge flap configured only to allow such that air is discharged to the outside of the transparent member.

The present disclosure provides an oxygen breathing apparatus. The present disclosure provides an oxygen breathing apparatus including a hose including one end portion, another end portion opposite the one end portion, and a connector provided between the one end portion and the other end portion and configured to allow a mouthpiece to be mounted thereon; a fan connected to the one end portion of the hose; an exhalation bag connected at one side to the fan, and fluidly connected at another side to the other end portion of the hose; an oxygen supply device configured to store oxygen, and connected to the exhalation bag; and a controller configured to control driving of the fan so that the fan forms a unidirectional air flow within the hose.

The present disclosure provides an oxygen breathing apparatus. The present disclosure provides an oxygen breathing apparatus including a hose including one end portion, another end portion opposite the one end portion, and a connector provided between the one end portion and the other end portion and configured to allow a mouthpiece to be mounted thereon; a fan connected to the one end portion of the hose; an exhalation bag connected at one side to the fan, and fluidly connected at another side to the other end portion of the hose; an oxygen supply device configured to store oxygen, and connected to the exhalation bag; and a controller configured to control driving of the fan so that the fan forms a unidirectional air flow within the hose.

A lumbar adjustment system for use in a self-contained breathing apparatus, the lumbar adjustment system having a rotating ring member operatively connecting a backplate to a lumbar plate, wherein the rotating ring member directly or indirectly engages with a locking notch and grooves in the backplate channel to allow adjustment of the lumbar plate relative to the backplate while the self-contained breathing apparatus is worn by a user.