The idea of a jet parachute, the braking force of which is created by the reaction of a gas jet flowing through one or more nozzles from a chamber containing a certain amount of compressed gas, was proposed by A. P. Herman. P. Herman. However, despite a number of undoubted advantages of this system over the known systems of mine parachutes it was not theoretically justified and applied in practice ...

One of the most important parts of the mine jet parachute is the mechanism for opening the outlet of the compressed gas chamber to release the expelling jet at the moment of parachute device activation ...