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
Peered proctoring
Perspective runway system
Systems and methods for sensing external magnetic fields in implantable medical devices
Vehicle wheel rim protector
Accessing a base station
Printing apparatus
Communication terminal, communication system, server apparatus, and communication connecting method
  Randomly Featured Patents
Radiation scanning system with two relatively movable reflectors
Porous films by backfilling with reactive compounds
Pressure control for the fuel system of an internal combustion engine
Method for forming 2-dimensional code by laser marking and laser marking device
Image forming device having a photosensitive drum and developing roller that rotate in the same direction
Aramid fiber coated with polyfunctional aziridine
Hand light
Motor-driven power steering system for a vehicle
Pressure detection device
Portable interactive device integrated with housing and multi-purpose clip for physical fitness activity