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
Powerline communication device with load characterization functionality
SRAM cells using shared gate electrode configuration
Tint block image generation program and tint block image generation device
High-voltage AC light-emitting diode structure
Projection screen and projection system having the same
Method and system for distributing ringback files
  Randomly Featured Patents
Fire resistant textile yarn and use thereof
Manipulating and selecting unit for recycling pressed or unpressed bodies obtained from plastic material containers or others
Anti-theft device
Flat panel display device and a method of making the same
Combination coin mechanism and coin counter, and coin counter individually, for bulk vending machines
Image processing apparatus and image processing method thereof
Vital product data collection during pre-standby and system initial program load
Pearlbush plant named `Blizzard`
Container and method and apparatus for the coating of same
Air-propelled vessel with articulating member