Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Portable computer display structures
Cover opening and closing unit and image forming apparatus including the same
Flow cytometer method and apparatus
Printing apparatus
Liquid crystal display
Pattern transfer apparatus and method for fabricating semiconductor device
Electronic device and printed circuit board
  Randomly Featured Patents
4-imidazolin-2-one compounds
Closed-mold for LED alphanumeric displays
Method of treating a carbon current collection brush blank and brush resulting therefrom
Oxygen sensor
Image processing apparatus, image processing method and image scanning apparatus
Device for a wiggle-free table
Actuator for an aircraft nacelle mobile structure, and nacelle comprising at least one such actuator
Manufacture of semiconductor device using a-c anti-reflection coating
Sea-going craft
Surface mount control box