Ammunition and explosives – Smoke generating
Reexamination Certificate
1999-07-15
2001-09-04
Jordan, Charles T. (Department: 3641)
Ammunition and explosives
Smoke generating
C102S334000, C102S364000, C102S315000, C102S320000, C102S321000, C102S322000, C102S323000
Reexamination Certificate
active
06283032
ABSTRACT:
BACKGROUND OF THE INVENTION
The current invention relates to a projectile with an effective mass, specifically a quick-burning deception component generating spontaneous smoke and a slow-burning concealment component generating persistent smoke, comprising an igniter, ejection charge and/or ignition decomposition charge, and at least one ignition delay device.
Such a projectile, for protecting an object, is known from Wardecki et al. U.S. Pat. No. 5,551,345, for example, the disclosure of which is incorporated by reference herein. A two-component smoke projectile is described therein, whereby the deception component is separated during firing of the concealment component and is accelerated relative to the concealment component and becomes effective at the same time. The separation of the two effective elements and the decomposition action of the deception component causes, however, such an impulse thrust in case of the known two-component smoke projectile and also causes such uncontrollable sequential propulsion that the sequence of decomposition action of the spontaneous smoke (of the deception component) and the persistent smoke (of the concealment component) may not be maintained.
A quick-action smoke hand grenade for an effective charge is known from Rayer et al. U.S. Pat. No. 5,700,971, whereby the person throwing the grenade is protected from mechanical injuries mainly because the more solid small parts of the grenade remain together by means of corresponding safety elements and are not blown away during and after decomposition of the effective charge. The disclosure of this document is incorporated by reference herein.
In addition, a training warhead is known from DE-297 18 216, whereby an electric igniter is installed, at least partly, within the ignition decomposition charge to initiate decomposition in the ignition charge and to cause a reaction in the effective charge essentially without delay. The disclosure of this document is incorporated by reference herein.
Finally, it is known from DE-28 30 119 to install ignition decomposition charges within the effective mass component. The disclosure of this document is incorporated by reference herein.
The invention has the task to develop the generic projectile in such a manner that operating reliability is increased and risk of injury to the person throwing the grenade is minimized while reducing cost and simplifying the design.
SUMMARY OF THE INVENTION
This task is solved, according to the invention, in that at least one effective mass component is exclusively radial decomposable; whereby the bottom of at least one effective mass can (container) is connected firmly with the lid of this can, even during decomposition action of the effective mass; whereby there is installed in the effective mass at least one ignition delay device, the ejection charge and/or decomposition charge; and whereby the igniter is installed, at least partly, within the effective mass.
It is thereby preferred, according to the invention, that the lid of at least one effective mass can is connected with a perforated pipe to the bottom of this can and that the perforated pipe has an ignition decomposition charge.
One innovative version is characterized in that the effective mass includes a deception component and a concealment component, the deception component is exclusively radial decomposable, the deception component is placed in at least one effective mass can that has a firm connection between its lid and it bottom, the concealment component is placed in another effective mass can, both effective mass cans are connected with one another, an ignition delay device of the concealment component and the ejection charge are installed in the concealment component.
Thereby it may be planned that an ignition delay device of the deception component is installed in the concealment component.
It is further suggested, according to the invention, that the preferably electric igniter is installed in the concealment component.
Thereby it may also be planned that the igniter is, at least partly, placed into the ejection charge.
According to the invention, a primer may be installed that extends longitudinally through the center of the concealment component and in which primer there is located the ejection charge and the ignition delay device of the deception component.
It may also be planned that the weight of the individual effective mass particles, which are separated during decomposition action, is minimized.
The invention suggests further that at least one effective mass can, specifically the one for the deception component, has a shell between its bottom and the lid and that this shell is very thin and breaks up into small, light pieces.
In one preferred version it is planned, according to the invention, that the effective mass can (container) of the concealment component has a shell between its bottom and the lid and that the shell of the can would melt during burnout of the concealment component.
Finally it is planned, according to the invention, that the radius of the decomposition throwing range is adjustable by at least one ignition delay device.
The invention is therefore based on the surprising realization that the corresponding decomposition energy is effective only in radial direction at decomposition of the effective mass, so that the effective mass is distributed over a large area during decomposition while no other parts of the projectile receive an impulse from the decomposition that could cause deviation from the ballistic path during flight. In addition, no parts turn into shrapnel, which would have the potential for injuries. For this reason and also to simplify the projectile design at a reduction in cost, according to the invention, the bottom and the lid of the effective mass can (container) are firmly connected to one another, for example, by a perforated pipe that serves as a tie rod. The developing pressure that is pushing during decomposition in longitudinal direction against the bottom and the lid of the can (container) is cancelled out, so that an effective force remains only in radial direction. A considerable reduction in cost is realized in that all charges, the ejection charge, the ignition decomposition charge, and the ignition delay device are installed inside the projectile and whereby the igniter is preferably installed, at least partly, in the ejection charge. This saves space or makes more room for the effective components within the projectile.
A preferred version of the invention is realized in case of two-component smoke projectiles whereby no separation of the effective mass component occurs during decomposition action of a deception component and a concealment component. This results in reduction of injury potential, a better decomposition sequence and cost reduction.
REFERENCES:
patent: 1367464 (1921-02-01), Cook
patent: 1382750 (1921-06-01), Sprague et al.
patent: 2419371 (1947-04-01), Schlumberger
patent: 3358600 (1967-12-01), Griffith et al.
patent: 3517616 (1970-06-01), Martin
patent: 4593622 (1986-06-01), Fibranz
patent: 4622899 (1986-11-01), Weber
patent: 5092245 (1992-03-01), Douglas et al.
patent: 5551345 (1996-09-01), Wardecki et al.
patent: 5700971 (1997-12-01), Rayer et al.
Buck Neue Technologien GmbH
Burns Doane , Swecker, Mathis LLP
Jordan Charles T.
Semunegus Lulit
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