DIVING BREATHING APPARATUS WITH SEMI-CLOSED BREATHING SYSTEM Russian patent published in 2024 - IPC B63C11/14 

FIELD: diving equipment.

SUBSTANCE: devices for supplying gas to a diving breathing apparatus. The diving breathing apparatus with a semi-closed breathing circuit consists of a sealed housing with a lid and connected gas pipelines for supplying and discharging the breathing gas mixture, inside which a switch is located. The switch has a cavity and channels in which calibrated nozzles are installed, and is fixed in the operating position by a spring and a handle connected by a rod to the switch. The handle is limited by a rim located on the lid. Depending on the selected switch position, a breathing gas mixture is selected that can be used for breathing from the device.

EFFECT: ability to use a diving breathing apparatus with a semi-closed breathing system with various breathing gas mixtures is achieved, which will eliminate the use of several devices specialized for working with a fixed breathing gas mixture.

1 cl, 2 dwg