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
Methods and devices for multiple-mode radio frequency synthesizers
Heterogeneous language data typing without executable regeneration
Ink, ink jet recording method, ink cartridge, and ink jet recording apparatus
Systems and methods for flow mirroring with network-scoped connection-oriented sink
XDSL system and signal transmission method, sending device, and receiving device of xDSL system
Vehicle fender
Flexible pouch
  Randomly Featured Patents
Method and apparatus for molding a composite plastic article
Lysimeter methods and apparatus
Structural building member
Image information process apparatus for causing a display to display continuous tones in a pseudo manner
Uric acid assay device with stabilized uricase reagent composition
Method and system for soft handoff of mobile terminals in IP wireless networks.
Quartz oscillator mountings
Process for producing methyl tertiary butyl ether
Presweetened comestible composition