SEISMIC WAVE SOURCE FOR MARINE SEISMIC SURVEY Russian patent published in 2013 - IPC G01V1/135 

FIELD: mining.

SUBSTANCE: device includes a pneumatic chamber with a cylindrical housing, an upper cover plate and a lower cover plate made on its inner side in the form of steps, a card arranged in upper part of pneumatic chamber and provided with possibility of interacting at its lower end face and forming a pilot-operated check valve with an upper end face of cylindrical waveguide, which is equipped with an O-ring. The above card is rigidly fixed on inner surface of upper cover plate of pneumatic chamber, and waveguide forms on some end part of the working stroke with inner surface of lower cover plate of pneumatic chamber a damper cavity that is connected to the pneumatic chamber through an annular channel formed with inner cylindrical surface of the step of larger diameter of lower cover plate of pneumatic chamber and outer surface of step of larger diameter of waveguide.

EFFECT: avoiding repeated pulsations of the emitting card during the source working cycle.

2 dwg