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
Data center management unit with improved disaster prevention and recovery
Lens module and method for manufacturing thereof
Network decoys
Magnetic levitation motor used in lens module
Selecting input/output components of a mobile terminal
Retransmission control method, base station and mobile station
Differential ring oscillator and method for calibrating the differential ring oscillator
  Randomly Featured Patents
Apparatus for making a virtual movie for use in exploring a site
3-substituted carbonyloxy-7-disubstituted amino-10-substituted carbonylphenothiazines
Compliant integrated circuit package substrate
Balloon-tying device
Mailing list management system and electronic mail transmitting/receiving apparatus
Capacitive-type acceleration sensor
Home theater speaker
System and method to interface a local area network with a wide area network
Dual redundant bus interface circuit architecture
Biodegradable urine collection device