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
Multi display device and method of controlling the same
Method of manufacturing acrylic film, and acrylic film
Power supply architecture system designer
Phosphor, light emitting apparatus, and liquid crystal display apparatus using the same
Content reproduction apparatus and content processing method therefor
Mixture, especially spinning solution
Measurement protocol for a medical technology apparatus
  Randomly Featured Patents
Magnetic recording medium and method of producing the same, and magnetic storage apparatus
Field effect transistor with alpha particle protection
System and method for detection of denial of service attacks
Processes for producing triaryl phosphite
Sink and stove with rack
Method and apparatus for zero temperature coefficient reference voltage devices
Fluid flow control device and compression member therefor
Device for plug-connecting electric lines
Intracavity sum-frequency mixing laser
Filtered venting system for liquid containers which are susceptible to contamination from external bioburden