Ordnance – Bomb – flare and signal dropping – Explosive releases
Patent
1991-02-12
1992-04-28
Brown, David H.
Ordnance
Bomb, flare and signal dropping
Explosive releases
2441374, F41F 306, B64D 104
Patent
active
051077493
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a separating device for quick mutual separation of objects and vehicles, especially air and space vehicles, comprising attaching elements attached to the air vehicle and the object, arranged to interact separably in holding together the vehicle and the object.
The concepts of "vehicle" and "object" have in this connection a relatively wide meaning. By vehicle it is meant every movable carrier of one or more objects. The carrier may e.g. be provided with its own driving device, such as a jet motor or a rocket engine or other driving device. However, the carrier may also consist of a ballistic projectile or the like. The object may in turn consist of a missile, bomb or satellite that is to be separated from a carrier rocket, or may be some other arbitrary object.
It is evident from the examples named above that separating devices of the above-mentioned type can have numerous applications. In all cases, the aim is to achieve a precisely controllable separation. Hitherto existing separating devices of this type have in many cases been complicated and expensive, and also they have often shown inadequate precision in use.
The object of the present invention is therefore to provide a separating device of the introductorily-mentioned type which has a relatively simple construction and is therefore relatively inexpensive and which admits a precisely controllable separation.
According to the invention such a separating device is characterized primarily in that the first attaching element comprises a casing with an internal first cylindric portion in which a first piston is arranged movable in the axial direction of the portion, sliding essentially liquidtightly along the wall of the portion, separating the portion in a first and a second chamber, the first attaching element comprising a preferably conically generated first grip part, whereas the second attaching element is formed with a second grip part that is separably attachable to the first grip part with a shrinking fit, so that the surfaces of the grip parts are in frictional connection, the arrangement being that at least one connecting channel is arranged to connect the said second chamber with the said surfaces, a source of pressure being arranged to increase principally instantaneously the fluid pressure in the first chamber so that the piston will cause a liquid to separate the surfaces via the connecting channel, whereby the grip parts are released from each other, for the separation of the object and the vehicle.
The first attaching element can be attached either to the vehicle or the object, and this applies also to the second attaching element.
The first and second grip parts, both of which are preferably provided with conically generated external and internal surfaces, may also optionally be included in the first and the second attaching element, respectively.
Said connecting channel may also be arranged either in the first or the second attaching element.
In a preferred embodiment of the separating device according to the invention, the connecting channel comprises a second cylindric portion having its axis parallel to the axis of the first cylindric position, in which second cylindric portion a second piston rigidly connected with the first piston is arranged axially movable with essentially liquidtight fitting against the wall of the second cylindric portion, the second portion piston showing a smaller pressure cross section than the first piston.
The above-described embodiment is particularly advantageous when the liquid, i.e. usually an oil, is included in a liquidtight, perforatable container that is placed in the second cylindric portion. A perforating means is then arranged so that when the second piston exerts pressure on the container the perforating means will connect the liquid to said surfaces. The perforating means may e.g. be formed as a cannula point projecting upwards from the bottom of the second cylindric portion. Other embodiments are of course possible. The container is suitably made of a metal fo
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Brown David H.
Saab Missles Aktiebolag
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