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
Method and system for associating a cell-sector with time-dependent location parameters
Establishing a graphical user interface (`GUI`) theme
Visual physician office systems and methods
Power management method for reducing power of host when turning off main monitor and computer system applying the same
Method and apparatus for image sensor packaging
Encryption using alternate authentication key
Electrode and method for manufacturing the same
  Randomly Featured Patents
Operate light source of reading unit of a multifunction peripheral device according to valid instructive keys
Rebar positioner
Color-coded ruler for three-phase wiring
Well tool setting assembly
Method for identifying color separation film
MRI-compatible implantable lead having high impedance electrodes
Method for producing a composite structure including a piezoelectric element
Compositions comprising vitamin D precursors and the use thereof
Quick acting bank note recovery system
Dosing limitation for an implantable medical device