PNEUMATIC RADIATOR OF ACOUSTIC SIGNALS FOR WATER AREAS Russian patent published in 1994 - IPC

Abstract RU 2022238 C1

FIELD: fish industry. SUBSTANCE: cylinder in the pneumatic radiator of acoustic signals is made as a turned over cup whose bottom carries a check valve which connects the starting chamber formed by the upper cover of the radiator and the bottom of the turned over cup with the working chamber. EFFECT: improved reliability of acoustic signal radiation. 1 dwg

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RU 2 022 238 C1

Authors

Ezhov Vladimir Aleksandrovich

Dates

1994-10-30—Published

1990-10-29—Filed