Seismic energy source
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United States of America Patent
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Oct 20, 1987
Grant Date -
N/A
app pub date -
Dec 30, 1985
filing date -
Dec 30, 1985
priority date (Note) -
Expired
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Abstract
A hydraulically controlled seismic energy source for impressing individual seismic energy pulses into the ground, wherein the hydraulic pressure forcing the ram downwardly is substantially reduced slightly before the ram contacts the ground, and a continual upward hydraulic force is applied to a downwardly facing surface of the ram, whereby the ram is quickly removed from the ground after a seismic impulse is generated to prevent secondary contact between the ram and the ground.
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