CONTROLLED PNEUMATIC SHUTTER OF SOURCE OF SEISMIC SIGNALS Russian patent published in 1998 - IPC

FIELD: sea and hole seismic prospecting, specifically pneumatic radiators. SUBSTANCE: controlled pneumatic shutter of source of seismic signals has body with cavity communicating with compressed air source, controlling actuator manufactured for instance in the form of electromagnet interacting with controlling valve. Shutter is supplemented with one or several check valves with own outlet windows growing in diameter. Last of them is outlet window of shutter. Controlling valve is made from elastic elastomer. First check valve has capability for collapse of mouth of its outlet conduit under action of pressure. EFFECT: improved functional reliability of shutter. 3 dwg