Device for breaking a hard material

Details Device for breaking a hard material Device for breaking a hard material

E - Fixed Constructions

21

C

262/68

E21C 25/60 (2006.01) B05B 12/06 (2006.01) B26F 3/00 (2006.01) F01B 11/00 (2006.01) F01L 25/06 (2006.01) F15B 21/12 (2006.01)

Patent

CA 1151679

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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