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US 4,231,283 AGranted
Pulsating liquid jet gun and method of operating the same
AssigneeMesserschmitt-Bolkow-Blohm GmbH
InventorWerner Malburg
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AssigneeMesserschmitt-Bolkow-Blohm GmbH
InventorWerner Malburg
Estimating the term…
A pulsating liquid jet gun, comprises, a housing which defines a cylindere having a small diameter portion defining a liquid chamber with an outer end having a discharge nozzle and an inner end which is connected to an intermediate diameter portion of a greater diameter than the smaller diameter portion and it, in turn, is connected at its opposite end to a large diameter portion. A free piston has a first portion which is movable in the intermediate diameter portion and a second portion of small diameter in the first portion which is movable in the small diameter portion of the bore in sealing engagement therewith. An ignition piston has a first portion which is movable in the large diameter portion and a second portion of a smaller diameter which is movable in the large diameter portion and into and out of this intermediate diameter portion. The second portion of the ignition piston and the first portion of the free piston have opposed end faces in the intermediate diameter portion which define a combustion space therebetween. A mechanism is provided for periodically delivering a charge of liquid into the small diameter portion and, in addition, a mechanism is provided for periodically delivering apropellant charge to the combustion space and to cause the ignition of the propellant charge to generate hot reaction gases between the ignition piston and the free piston so as to cause relative displacement therebetween in respective opposite directions and to cause the expulsion of the liquid instantaneously through the nozzle under high force.
A pulsating liquid jet gun, comprising, a cylinder having a cylinder bore with a combustion space for periodically receiving a propellant charge and a bore portion defining a liquid chamber, a free piston movable in said cylinder bore between said combustion space and said liquid chamber, means for generating hot reaction gases by ignition of said propellant charge periodically in said combustion space, means for filling liquid into said liquid chamber prior to every ignition of said propellant charge, said means for generating hot reaction gases for causing ignition of the propellant charge being by an adiabatic compression thereof thermally initiating the ignition.
A pulsating liquid jet gun, comprising, a housing defining a cylinder bore having a small diameter portion defining a liquid chamber with an outer end having a discharge nozzle and an inner opposite end, an intermediate diameter portion of greater diameter than said small diameter portion connected to said opposite inner end, a large diameter portion of greater diameter than said intermediate diameter portion connected to said intermediate diameter portion, a free piston having a first portion movable in said intermediate diameter portion and a second portion of smaller diameter than said first portion moable in said intermediate diameter portion and also into said small diameter portion, an ignition piston having a first portion movable in said large diameter portion of said cylinder and a second portion of a smaller diameter than said first portion movable in said larger diameter portion of said cylinder and also into said intermediate diameter portion, said second portion of said ignition piston and said first portion of said free piston having opposed end faces in said intermediate portion which define a combustion space therebetween, means for periodically delivering a charge of liquid into said small diameter portion, means for periodically delivering a propellant charge to said combustion space, and means for acting on said ignition piston to move said ignition portion toward said free piston to produce hot reaction gases between said free piston and said ignition piston and causing adiabatic ignition of the propellant charge to cause movement of said free piston and said ignition piston in respective opposite relative directions to cause liquid to be displaced by said second portion of said free piston out of said nozzle.
A method of operating a liquid jet gun using a cylinder having interconnected large diameter, intermediate diameter and small diameter portions of different diameter dimensions with the smallest diameter portion having a nozzle discharge and with an ignition piston having respective portions movable in the large diameter portion and into and out of the intermediate diameter portion in sealing engagement therewith and with a free piston having respective portions movable in the intermediate diameter portion and into and out of the small diameter portions in sealing engagement therewith, comprising, periodically directing a propellant charge into the intermediate diameter portion between the free piston and the ignition piston, moving the free piston and ignition pistons relatively so as to cause the adiabatic compression of the propellant charge and the ignition thereof to force the free piston relatively away from said ignition piston, periodically filling the small diameter portion with a liquid so that the liquid becomes forced out by the movement of the free piston upon ignition of the propellant charge.
Dependencies are inferred from the claim text.