1991-09-05
1992-09-22
Brown, David H.
Ordnance
Pneumatic
F41A 104
Patent
active
051499070
ABSTRACT:
A weapon including a barrel (2), with a charge chamber (5) and an arrangement for delaying a drop in the maximum gas pressure in the barrel after firing of a charge in the chamber, with the arrangement for delaying a drop in the maximum gas pressure injecting an additional quantity of a liquid propellant (13, 13') into the charge chamber (5). To effect the injection of the liquid propellant (13, 13') into the chamber (5), primarily with a view toward short loading times, openings (10, 10', 18, 18') are provided in the barrel wall portion (9) defining the chamber (5), and these openings are connected by valves (12, 12') with containers (14, 14') containing the liquid propellant (13, 13'). The valves may be directly responsive to the maximum pressure in the chamber (5) to directly inject a measure or quantity of the liquid propellant into the charge chamber or prior to firing of a charge in the charge chamber (5) may supply the measured quantity of additional liquid propellant to a further tubular container (16, 16') connected at both ends to the charge chamber (5). In this latter case, the liquid propellant is injected via a piston (19, 19') disposed in the tubular container (16, 16') and responsive to gas pressure, and in particular gas pressure gradients in the charge chamber (5).
REFERENCES:
patent: 2790354 (1957-04-01), Yoler et al.
patent: 2965000 (1960-12-01), Skinner
patent: 3690255 (1972-09-01), Vass et al.
patent: 3763739 (1973-10-01), Tassie
patent: 4336741 (1982-06-01), Baines
patent: 4376406 (1983-03-01), Black
Brown David H.
Rheinmetall GmbH
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