Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent
1985-12-30
1987-10-20
Kyle, Deborah L.
Acoustics
Geophysical or subsurface exploration
Seismic wave generation
181119, G01V 104
Patent
active
047008040
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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CMI Corporation
Kyle Deborah L.
Steinberger Brian S.
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