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
System and method for providing location and access network information support in a network environment
Variable speed traffic control system
Method and apparatus for interactive distribution of digital content
System and method for enabling image recognition and searching of remote content on display
Bioelectric battery for implantable device applications
Controlling transmission resources in mobile radio systems with dualtransfer mode
  Randomly Featured Patents
Plant promoters
Children's riding toy
Touch panel device
Replacement of split-pin assemblies in guide tubes
Clarifiers for polyolefins and polyolefin compositions containing same
Method and apparatus for performing collaborative searches
Method for determining spraying parameters for a paint spraying unit
Merchandiser with curved ends
Retrofit subscriber loop carrier system with improved performance monitoring and remote provisioning
Swivel barstool