COANDamp;Abreve;-EFFECT NOISE-REDUCING RECOIL BUFFER FOR FIRE ARMS

摘要

The invention relates to a noise-reducing recoil buffer for fire arms using the Coandă effect. According to the invention, the buffer uses the Coandă effect upon gas discharge through some slots (a) cut on the lateral sides thereof, thereby allowing gas expansion on some depressed Coandă surfaces consisting of a profiled body (1) and some flaps (2) provided with some channels (b) which, in the low pressure zone, suck in cold air from the space outside the barrel concomitantly with the gas discharge, to lower the temperature thereof, the resultant pressure exerted by the gas onto the front walls of the slots (a) together with the upward force occurring on the extrados of the depressed Coandă surfaces buffering the fire arm recoil, the Coandă effect between the slots (a) leading to the gradual expansion of gases on the surface of the depressed Coandă surfaces, thereby reducing the noise, by sucking in the spent gas inside the barrel of the fire arm and, at the same time, by cooling down the discharged gases, leading to a lower visibility of the fire arm in the battle field.