Projectile equipped with deployable parachute

Details Projectile equipped with deployable parachute Projectile equipped with deployable parachute

1988-09-22

1989-12-26

Brown, David H.

Ordnance

Explosive operated apparatus

102378, 102387, F42B 1338

Patent

active

048890308

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates to a projectile equipped with a deployable parachute. More particularly, the present invention relates to such a projectile which is composed of at least two sections arranged axially in tandem and connected with one another by means of radially extending bolts, and with one of the sections accommodating the parachute.
One possibility of recovering projectiles undamaged after firing is to decelerate the flying velocity of the projectile or of its components to acceptable ground impact values with the aid of a parachute. A parachute can also be employed to cause the projectile tip to penetrate into the ground.
To cause the parachute to become effective, it must be ejected on the trajectory or the projectile must be separated in such a way that the parachute is able to automatically deploy as a result of the streaming air.


SUMMARY OF THE INVENTION

It is an object of the invention to provide a projectile having a deployable parachute, with such a projectile being of the type mentioned above with two axially tandem sections connected by radial bolts and having a simple structure and permitting reliable separation for deployment of the parachute.
This object is accomplished according to the invention by a projectile of the above described type wherein the radial bolts are radially chargeable by the gas pressure so as to separate the two sections, with the pyrotechnic charge being burnt off or ignited by way of a fuse.
Further features of the invention are to be found in the description below and in the dependent claims.
The invention will be described below in greater detail with reference to embodiments that are illustrated in the attached drawing figures.


BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is a longitudinal sectional view of a projectile equipped with one embodiment of a separating device.
FIG. 2 is a cross-sectional view of the separating device along line II--II of FIG. 1.
FIG. 3 is a longitudinal sectional view along line III--III of FIG. 2.
FIG. 4 is a cross-sectional view along line IV--IV of FIG. 3.
FIG. 5 is a longitudinal sectional view along line V--V of FIG. 4.
FIG. 6 is a partial cross-sectional rear view of a further embodiment of a separating device.
FIG. 7 is a longitudinal sectional view along line VII--VII of FIG. 6.
FIGS. 8 to 11 are sectional views corresponding to lines VIII--VIII to XI--XI of FIGS. 6, 7, 8 and 9.
FIG. 12 is a longitudinal sectional view of an additional embodiment of a separating device.
FIG. 13 is a sectional view along line XIII--XIII of FIG. 12.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In the embodiment shown in FIGS. 1 to 5, a projectile 1 is composed of a nose section 2, a center section 3 and a tail section 4, with tail section 4 being equipped with fins 5 and accommodating two parachutes 6, 6'. Also provided is a propelling cage 7 which extends essentially over the center section 3 and part of the tail section 4 and is discarded upon firing after it has left the gun barrel.
Center section 3 is provided at its rear with a coaxial cylindrical recess 8 at whose bottom two delayed-action fuses 9 are disposed which are covered by means of a plate 10. Recess 8 is closed by an insert 11 which simultaneously accommodates plate 10 and is connected with center section 3 by means of screws 12 extending in the axial direction. On its circumference, insert 11 is sealed against center section 3 by circumferential seals 13 between which there is disposed an annular, circumferential channel 14.
In corresponding blind bores in insert 11, a pyrotechnic charge 15 and a flame capsule 16 are inserted from the side facing plate 10 in two diametrally oppositely disposed positions, the flame capsule 16 being connected by way of conduits 17 extending through plate 10 with the associated delayed-action fuses 9 so that flame capsules 16 can be ignited by delayed-action fuses 9. Gas conducting channels 18 extend from the region of the blind bores accommodating the pyrotechnic charge 15 to the annular channel 14.
Moreover

REFERENCES:
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patent: 3505925 (1970-04-01), Carr
patent: 3706281 (1972-12-01), Hatakeyama
patent: 3902400 (1975-09-01), Kincheloe et al.
patent: 3903803 (1975-09-01), Losey
patent: 3910154 (1975-10-01), Gardner
patent: 4187759 (1980-02-01), Toy et al.
patent: 4651648 (1987-03-01), Alon

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