PROJECTILE IN THE FORM OF A HOLLOW TUBE, HAVING INTERNAL ELEVATIONS OR RECESSES OR COMBINATIONS THEREOF, SUCH THAT AIR FLOWING THROUGH SETS THE PROJECTILE IN ROTATION

Abstract

The invention describes a tubular projectile which is suitable for being fired in particular by bows or crossbows (such as bolts and arrows), but can also be fired from other shooting devices (for example firearms). The arrow is set in rotation about its longitudinal axis by the air passing through after being fired. The rotation is achieved by elevations or recesses applied to the inner surface, which are primarily designed in a linear manner and, by interaction with the air passing through, create a trajectory-stabilizing rotation of the rod or hollow tube. To this end, the arrow generally requires no or less fletching or other elements that stabilize the trajectory.

Claims

1. Hollow tube (projectile, IARV arrow) characterised in that, due to elevations and/or recesses on the inner side of the tube, a rotation movement after firing by means of a suitable device such as a bow or crossbow, for example, is obtained, strengthened, maintained or decelerated by means of a medium flowing through when moving.

2. Projectile according to claim 1, characterised in that the elevations and/or recesses are implemented both as small elements (nubs) and in a linear design. In particular, this applies to spiral nub arrangements and/or lines of elevations and/or recesses. The elevations and recesses can vary in height or depth as well as in their distances, e.g. coil distances, as well as in the distribution across the inner wall of the hollow tube (optimisation options). Some of these optimisation options in different forms can arbitrarily combine with each other.

3. Projectile according to claim 1, characterised in that the elevations and/or recesses are implemented in such a way that a desired rotation speedasymptomatically approximated if necessaryis obtained or (e.g. unintended) rotation movements are avoided or decelerated.

4. Projectile according to claim 1, characterised in that the front end in the direction of flight includes a diameter increase for better reception of the medium flowing through or additional openings (inlet slits) which serve the improved intake of the medium flowing through.

5. Projectile according to claim 1, characterised in that a weight-increasing element is attached on the front end (in the direction of flight) or a heavy material is used. This can occur, for example, by the material strength being increased there or another heavy material or an additional coating or an interior, heavy ring also being used as ballasting if necessary.

6. Projectile according to claim 1, characterised in that an element often implemented by an indentation for the reception of a string is attached on the back end (opposite the flight path).

7. Projectile according to claim 1, characterised in that several projectiles are designed with different diameters in such a way that they can be fitted one into the other, in order to save space, for example.

8. Projectile according to claim 1, characterised in that a tip, cutting edge or a taper, for example, is attached on the front end (in the direction of flight), which serves the purpose of a greater penetration depth, by minimising the target surface, or a cutting effect into a target independent of rotation.

9. Projectile according to claim 1, characterised in that an element is attached to the front end (in the direction of travel), which causes a greater penetration depth or greater effect on the target due to the rotation. This can be, for example, a sawtooth design of the opening of the hollow tube which mills into the target, as it were, or a drill-like design of the tip.

10. Projectile according to claim 1, characterised in that elements are attached to the projectile which cause an effect independent of impulse and rotation of the projectile, due to the additional properties. These could be, for example, explosive tips, harmful or poisonous substances, an intended splinter effect in the material or comparable measures.

Description

PRIOR ART

[0014] Arrows have been known for thousands of years and have hardly been changed in terms of their basic principle since then. A rod-shaped projectile is mechanically accelerated by a firing device, for example a bow, a crossbow or a slingshot, and fired in a thereafter undriven flight path towards a target.

[0015] For the stabilisation and extension of the flight path, a fletching attached to the end opposite the flight path or comparable measures are often used.

[0016] These measures increase the air resistance and lead to a deflection and vibration of the projectile if the projectile grazes the firing device during the firing or positive acceleration phase. The accuracy and reproducibility of the flight path is strongly influenced by the aerodynamic properties of these measures and, in particular, by their ageing process and mechanical changes such as wear.

[0017] Fletchings or comparable measures also lead to an inefficient use of space for storage and transport (e.g. in a quiver) as well as greater expense during the production.

[0018] According to the patent specification DE000019638264C2, a bow is presented which directs arrows by means of a tube attached to the bow in such a way that said arrows are hereby set in rotation and their flight path is stabilised. Conversely, the invention presented here describes an arrow which independently causes the stabilising rotation without changes to the firing device.

[0019] According to the patent specification DE000008810059U1, an arrow is described which causes a rotation about the longitudinal axis by means of a specific design of the fletching. In contrast to this invention, in the case of the IARV arrow, no fletchings are necessary for the causation of the rotation.

[0020] According to the patent specification GB2385804 (A), a dart is described which is supposed to be prevented from jumping out of a dartboard. However, the dart is unchanged in relation to the flight stabilisation and thus does not anticipate the properties of this invention.

[0021] According to the patent specification GB0201183.1, an arrow is described which consists of a hollow tube, having an inner diameter which can vary across the length, in order to optimise the weight distribution and to increase the stability, in particular for striking a target. On one hand, this invention counts on material applied radially symmetrically and, on the other hand, does not relate to any technical properties which concern flight stabilisation, apart from the weight distribution. Thus it does not anticipate the properties of this invention.

[0022] Conversely, the present invention completely or extensively replaces the necessity for fletching or comparable measures and thereby avoids the above-cited problems for the production, firing, flight path, storage and transport. It allows the use of the invention without changes or special features on firing devices. A special adjustment of firing devices to this invention can, where applicable, increase the efficiency.

[0023] The invention further allows the simpler, more cost-effective and material-saving production of projectiles from one single material or fewer materials in fewer steps and can largely be automated.