Seismic pulse generator
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United States of America Patent
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-
Jul 17, 2001
Grant Date -
N/A
app pub date -
Sep 17, 1997
filing date -
Dec 23, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A seismic pulse generator (1) has a chamber (4) pressurised with gas. The generator includes a solenoid valve (60) which can be actuated to cause the release to atmosphere of only a small amount of pressurised gas from a small control chamber (34) behind a main piston (30) to enable the piston to move away from a valve seat (32) around an outlet (26). This permits the abrupt release of the pressurised gas in the chamber (4) through the outlet and the 'firing' of the generator. The arrangement maximises the use of the main pressurised gas for actual 'firing' of the generator.
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