Device for breaking a hard material
OwnerBarry E. Edney, Alain Zurcherinventors
Life of this patent
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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.
Claims5
A device for breaking a hard material, said device comprising a housing (2, 3, 4), a gas pressure accumulator (19) in said housing, a piston device (6) reciprocably movable in said housing and a valve means (11), characterized thereby that said piston device (6) comprises a first piston (8) being situated between a first chamber (15) and a second chamber (17) in said housing (2, 3, 4) and a second piston (10) acting as a movable end wall of said gas pressure accumulator (19), said valve means (11) being movable between a closed position in which it cooperates with said first piston (8) to prevent pressurized liquid from flowing from said first chamber (15) to said second chamber (17) and an open position establishing a flow communication (39) between said first and second chambers, whereby said first chamber is rapidly depressurized so that the gas pressure in said gas pressure accumulator (19) drives said piston device (6) in a power stroke to cause, directly or indirectly, breakage of the hard material.
Dependencies are inferred from the claim text.