UNDERWATER REPELLENT SOUND GENERATOR Russian patent published in 2011 - IPC A01M29/00 

FIELD: agriculture.

SUBSTANCE: underwater repellent sound generator contains spaced chambers (an upper one and a lower one), radial exhaust holes in the insert between the chambers and an axial exhaust hole in the lower chamber, a shuttle piston whose external diametre exceeds that of the axial exhaust hole, tight sealing elements and a hole in the upper chamber body for attachment of an air duct with a valve. The upper chamber body with the insert and radial exhaust holes is shaped as a cylinder with a flange on the front end. The cylinder internal diametre is the same along the whole of its height; on the flange in the chamber cavity the piston support damper is fixed fabricated of an elastic resilient material. The piston is designed as a cylinder with a rigid crosswise partition in the cavity dividing the cavity into two blind holes, the upper being deep and the lower being short. Additionally, the piston external diametre provides for clearance fit in the upper chamber cylinder. On the partition, in the short blind hole cavity, a butt-end sealing element is attached shaped as a washer. In the lower chamber body, on the outside of the upper butt-end downwards, the first groove is arranged, its height exceeding the piston short blind hole depth and its diametre providing for clearance fit in the said hole cylinder. Further below the second groove is arranged, its diametre providing for clearance fit in the upper chamber body cylinder. In the lower chamber body a hole is arranged for attachment of a second air duct with a valve, unconnected to the upper chamber air duct in terms of compressed air pressure in their channels.

EFFECT: more efficient and non-traumatic repelling of water creatures from local zones hazardous for their lives.

1 dwg