Boring or penetrating the earth – With seismic shock generating
Reexamination Certificate
2007-06-26
2007-06-26
Gay, Jennifer H. (Department: 3672)
Boring or penetrating the earth
With seismic shock generating
C173S142000
Reexamination Certificate
active
10522104
ABSTRACT:
A sonic drilling apparatus having a work piston within a cylinder chamber to provide a vibratory force through the alternate application of fluid under pressure into the bore above and below the piston in a manner that the piston will be forced to reciprocate within the bore. The cylinder chamber includes an inlet gallery to allow fluid under pressure to pass into the bore above a first face of the work piston and an exhaust gallery to allow fluid to escape from the bore below the second face of the work piston. A relief bypass is provided to prevent excessive build up of pressure in the bore during the reciprocating movement of the work piston.
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Bantry Limited
Gay Jennifer H.
Hochberg D. Peter
Mellino Sean
Stephenson Daniel P
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