Maneuvering impact boring head
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United States of America Patent
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Aug 18, 1998
Grant Date -
N/A
app pub date -
Mar 11, 1996
filing date -
Mar 11, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An impact boring head may comprise a main body having an internal cavity with a front end and a rear end. A striker having a head end and a tail end is slidably mounted in the internal cavity of the main body so that the striker can be reciprocated between a forward position and an aft position in response to hydraulic pressure. A compressible gas contained in the internal cavity between the head end of the striker and the front end of the internal cavity returns the striker to the aft position upon removal of the hydraulic pressure.
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