Device for breaking a hard material
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United States of America Patent
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-
Dec 14, 1982
Grant Date -
N/A
app pub date -
Oct 23, 1980
filing date -
Oct 23, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A liquid jet cannon having a reciprocably movable piston device (6). The piston device is held in cocked position against the action of a gas pressure accumulator (19) by liquid pressure in a first chamber (15) until initiation of a power stroke. The power stroke is initiated by depressurization of a control chamber (16), whereby a valve (11) is moved to its open position so that a flow communication (39) is created between the first chamber (15) and a second chamber (17). The first chamber is thus rapidly depressurized so that the pressure in the gas pressure accumulator (19) drives the piston device (6) into a liquid chamber (14) to produce a liquid jet pulse for breakage of the hard material.
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