AUTOMATED SYSTEM OF FLUID DRAINING FROM SIGHT-RANGE FINDER HYDRO-PNEUMATIC CLEANING TANK Russian patent published in 2009 - IPC F41G11/00 

FIELD: weapons and ammunition.

SUBSTANCE: invention relates to combat vehicles equipped with the system of hydro-pneumatic sight-range finder protective glass. The proposed system comprises, air vessel, pressure gage, valve to charge air into the system, pressure reducer with filter, valve with a cock, proportioner, tank, fluid drain valve and nozzle. The system is furnished with microprocessor-based control unit with input connected to the tank fluid temperature and level pickups outputs, while its output is connected to the input of aforesaid valve with cock. Note here that the tank is pipe connected, via valve with cock and proportioner, with nozzle. Note that the air vessel is-pipe connected, via valve with cock and reducer with filter, to the nozzle.

EFFECT: protection of hydro-pneumatic sight-range finder protective glass against its failure at abrupt ambient air temperature drop to negative temperatures.

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