Pulsating liquid jet gun and method of operating the same

Ordnance – Accelerating

Patent

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Details

175 67, 239101, B05B 108, B05B 314

Patent

active

042312833

ABSTRACT:
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.

REFERENCES:
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patent: 3490696 (1970-01-01), Cooley
patent: 3520477 (1970-07-01), Cooley
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patent: 3539104 (1970-11-01), Cooley
patent: 3784103 (1974-01-01), Cooley
patent: 3841559 (1974-10-01), Hall et al.
patent: 4058256 (1977-11-01), Hobson et al.
patent: 4074858 (1978-02-01), Burns et al.

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