Resources Contact Us Home
External air release control in seismic air gun

Image Number 2 for United States Patent #4219097.

Disclosed is a seismic source device, known in the industry as an air gun, having shuttle and external sliding valve control for allowing a predetermined discharge of compressed air into water for purposes of seismic exploration. The shuttle is controlled by air pressure to move it upward, thereby permitting compressed air in the firing chamber to exhaust through exhaust ports. The external sliding valve had been held in a downward position by air pressure supplied from the firing chamber, compressing a spring. As the firing chamber pressure drops, the compressed spring expands, forcing the sliding valve to move upward, closing the exhaust ports. By preventing further discharge of air, secondary pulses are greatly reduced, with little or no loss in acoustic output, thereby enhancing the operation of the entire system. Further, by preventing all the air in the firing chamber from being discharged, the system becomes more efficient and more cost effective.

  Recently Added Patents
Traffic signal mapping and detection
Multiple input multiple output transceiver
Apparatus and method for information processing, program, and recording medium
Security authentication method, apparatus, and system
Method for transitioning between Ziegler-Natta and metallocene catalysts in a bulk loop reactor for the production of polypropylene
Access control method, information display device using the same, and information display system
Anti-infective derivatives, method for the production thereof, pharmaceutical compositions containing same and uses of said derivatives in treatment
  Randomly Featured Patents
Two-resistor ice detector
Programmable serializing data path
Preparation of poly(ethlene-2,6-naphthalene dicarboxylate) from dimethyl-2,6-naphthalene dicarboxylate and methyl hydrogen 2,6-naphthalene dicarboxylate
Expanded polystyrene bead having functional skin layer, manufacturing process thereof, and functional EPS product and manufacturing process thereof using the same
Mine resistant armored vehicle
Substrate carrier having a streamlined shape and method for thin film formation
Radioactive substance container, manufacturing apparatus thereof and manufacturing method thereof
Press apparatus and methods for fusing overlapped thermoplastic sheet materials
Structure and method for forming a capacitively coupled chip-to-chip signaling interface
Carrier tube for sensors or samplers