Patent ID: 8223591

Claim:
An improved performance air gun as sound source for marine seismic exploration for petroleum deposits and said improved air gun comprising: an elongated cylindrical housing bored from each horizontal directed ends creating thereby a first bore and a second bore; a fixed radial wall separating said two bores, said fixed radial wall having a through bore for a hollow shaft for air control; a release shuttle assembly to reciprocate within said fixed radial wall; a fixed groove for placement of elastomer shaft seal rings within said fixed radial wall; a shuttle shaft having an outside diameter thereof sealed by said shaft seal rings; water entry passages for water entry to lubricate shaft seals; said release shuttle assembly having a set flange and a cup shaped air release flange and internal bearing; an air release end of said release shuttle assembly with said cup shaped air release flange and said internal bearing around outside diameter of said cup shaped air release flange; said elongated cylindrical housing having means for air input and said air release end having a bolt on said shuttle shaft with piston rings, means for providing air input, means for air valving and means for providing an orifice; and attachable release air chamber means for sealing and two air exhaust ports spaced opposite each other positioned at release air end of said elongated cylindrical housing and said ports directing said released air in a direction substantially perpendicular to axial direction of said elongated cylindrical housing.