The present invention relates to a wire cutter system developed to prevent an air vehicle from being damaged by obstacles hit during a flight.

When an air vehicle, such as a helicopter used for civil or military purposes and flying at low altitudes, hits against obstacles such as hardly-visible electrical wires or telephone cables during flight, accidents may occur, resulting in an air vehicle crash. Wire cutter systems are provided on air vehicles to reduce the risk of obstacles, such as electrical wires or telephone cables, hitting and damaging the air vehicle. Wire cutters are designed individually for each air vehicle, which can be placed in different positions on the air vehicle, have high strength during a cable or wire cutting process, and have a minimal aerodynamic impact.

CN109533360A, which is included in the known-state of the art, discloses a telescopic wire cutter. Said wire cutter comprises a mounting bracket having a first angle guiding port and a second angle mounting port. Said mounting bracket is mounted under the helicopter fuselage. In addition to the bracket, the wire cutter comprises a cutting blade and several guiding pieces. The guiding pieces are structured telescopically, and open during the flight of the helicopter to cut the wire or cable.

KR102042990B1 , which is included in the known-state of the art, discloses a wire cutting device mounted on a landing gear of a helicopter and moving with the landing gear, wherein if the helicopter is caught in a cable, such as a power cable, during landing, the wire cutting device cuts the cable to deploy the landing gears.

A wire cutter system according to the present invention prevents the air vehicle from being damaged by cutting a wire when the air vehicle is caught in obstacles such as cables or wires. Moreover, since the wire cutter can move in and out of the body, when the air vehicle is positioned on the ground, wings of the air vehicle and the wire cutter are prevented from hitting each other in case the wings are bent due to weight or atmospheric conditions. The wire cutter system realized to achieve the object of the present invention, which is illustrated in the first claim and other claims dependent thereon, comprises a body on the air vehicle; at least one rotor on the body, which allows the body to take off and move; at least one wire cutter which allows various obstacles such as electrical wires, telephone cables that the air vehicle hits during a flight to be cut before damaging the air vehicle.

The wire cutter system according to the invention comprises a first position (I) in which the wire cutter is triggered by the rotation of the rotor around its own axis, such that the wire cutter extends outward from the body and cuts the obstacles such as cables contained in the flight direction of the air vehicle; a second position (II) in which the wire cutter is retracted into the body from the first position (I) and does not extend outward from the body; at least one actuator that enables the wire cutter to move from the first position (I) to the second position (II) or from the second position (II) to the first position (I).

In an embodiment of the invention, the wire cutter system comprises the first position (I) in which the wire cutter extends outward from the body if the rotational speed of the rotor around its own axis is higher than a reference value determined by the manufacturer; a second position in which the wire cutter is moved from the first position (I) into the body if the rotational speed of the rotor around its own axis is lower than the reference value determined by the manufacturer.

In an embodiment of the invention, the wire cutter system comprises at least one sensor on the body, which reads the data on the rotational speed of the rotor around its own axis; a control unit which receives data from the sensor to compare the data read by the sensor with the reference value determined by the manufacturer; the control unit that triggers the actuator to move the wire cutter to the first position (I) or the second position (II) according to the rotor speed and the reference value.

In an embodiment of the invention, the wire cutter system comprises a pulley on the body; a belt that moves the pulley and provides the connection between rotor and pulley; a first chamber containing liquid or gas; the actuator movably located on the pulley; a second chamber in which a lower surface of the wire cutter is movably located; a conveying line that allows the fluid in the first chamber to be transported into the second chamber; the actuator, which moves into the first chamber on the pulley with the rotational speed of the rotor, thus applying force to the lower surface of the wire cutter by fluids carried into the second chamber, allowing the wire cutter to move from the second position (II) to the first position (I).

In an embodiment of the invention, the wire cutter system comprises the actuator that enables the wire cutter to move to the first position (I) or the second position (II) when the pilot provides an input to the control unit.

In an embodiment of the invention, the wire cutter system comprises the actuator rotating around an axis where the wire cutter extends to the wings, thus moving the wire cutter from the first position (I) to the second position (II) or from the second position (II) to the first position (I).

In an embodiment of the invention, the wire cutter system comprises the body located on a rotary wing air vehicle; at least one body surface located on the body and facing with the wings; the wire cutter extending from the body surface to the wings in the first position (I).

In an embodiment of the invention, the wire cutter system comprises a connector which enables the wire cutter to be rotatably attached to the body and to rotate from the first position (I) to the second position (II) or from the second position (II) to the first position (I) around the connection point on the body.

In an embodiment of the invention, the wire cutter system comprises an outer surface located on the wire cutter and complementary to the body surface so that it does not protrude from the wire cutter body surface when the wire cutter is in the second position (II).

In an embodiment of the invention, the wire cutter system comprises the wire cutter located between the body and the landing gears.

In an embodiment of the invention, the wire cutter system comprises the wire cutter extending from the body to the landing gears. In an embodiment of the invention, the wire cutter system comprises the actuator which is an electric motor.

In an embodiment of the invention, the wire cutter system comprises the body located on the helicopter.

In an embodiment of the invention, the wire cutter system comprises a deflector on the body, which is triggered by the actuator to guide the cables moved to the first position (I) or the second position (II) on the body without cutting the cables.

All the parts illustrated in figures are individually assigned a reference numeral and the corresponding terms of these numbers are listed below:

A wire cutter system realized to achieve the object of the present invention is illustrated in the attached drawings, in which:

Figure 1 is a side view of the wire cutter in the first position (I).

Figure 2 is a side view of the wire cutter in the second position (II).

Figure 3 is a side view of the belt, pulley, conveying system, first chamber and second chamber.

Figure 4 is a side view of the wire cutter, body surface and connector.

Figure 5 is a side view of the body.

Figure 6 is a perspective view of the wire cutter.

Figure 7 is a side view of the deflector.

All the parts illustrated in figures are individually assigned a reference numeral and the corresponding terms of these numbers are listed below:

1. Wire Cutter System

2. Body

3. Rotor

4. Wire Cutter

5. Actuator

6. Sensor

7. Control Unit 8. Pulley

9. Belt

10. First Chamber

11. Second Chamber

12. Conveying Line

13. Body Surface

14. Connector

15. Outer Surface

16. Deflector

(I) First Position

(II) Second Position

(S) Lower Surface

The wire cutter system (1) comprises a body (2) which is an air vehicle; at least one rotor

(3) on the body (2), which allows the body (2) to move; at least one wire cutter on the body (2), which cuts various obstacles such as electrical wires or telephone cables contacting the body (2) while moving, and thus prevents the body (2) from getting damaged.

The wire cutter system (1) according to the invention comprises a first position (I) in which the wire cutter (4) is triggered by the rotation of the rotor (3) around its own axis, such that the wire cutter (4) extends outward from the body (2) and cuts the obstacles contacting the body (2); a second position (II) in which the wire cutter (4) is moved from the first position (I) by the rotation of the rotor (3) around its own axis, and kept in the body (2); at least one actuator (5) that provides the movement of the wire cutter (4) from the first position (I) to the second position (II) and from the second position (II) to the first position (I) (Figure 1 , Figure 2, Figure 6).

Hardly-visible obstacles such as cables or wires, which are not noticed by the user during the movement of the body (2), cause the air vehicle to crash. By means of the wire cutter

(4) positioned on the body (2), cables and wires are cut before damaging the body (2). In this way, the flight safety of the air vehicle is enhanced. Since the wire cutter (4) is provided on the body (2) so as to be movable from the first position (I) to the second position (II), the air vehicle wings are prevented from colliding with the wire cutter (4) as a result of bending due to atmospheric conditions or weight. As the movement of the wire cutter (4) from the second position (II) to the first position (I) depends on the rotational speed of the rotor (3), the wire cutter (4) is enabled to extend out of the body (2) only during the flight of the air vehicle.

In an embodiment of the invention, the wire cutter system (1) comprises the first position (I) in which the wire cutter (4) extends outward from the body (2) to cut the obstacles contacting the wire cutter (4) when the rotational speed of the rotor (3) is higher than a value predetermined by the manufacturer; the second position (II) in which the wire cutter (4) is moved from the first position (I) and kept in the body (2) if the rotational speed of the rotor (3) is lower than the value predetermined by the manufacturer. When the rotational speed of the rotor (3) is above the value determined by the manufacturer, the air vehicle wings bend less. Since the wire cutter (4) is in the first position (I) on the body (2) only when the rotational speed of the rotor (3) determined by the manufacturer is exceeded, it can extend over the body (2) to a closer distance to the wings in the first position (I). In this way, the body (2) can be further protected against obstacles.

In an embodiment of the invention, the wire cutter system (1) comprises at least one sensor (6) on the body (2), which obtains the data on the rotational speed of the rotor (3); a control unit (7) which compares the data received from the sensor (6) with the rotational speed of the rotor (3) determined by the manufacturer, and which, according to the rotational speed of the rotor (3) determined by the manufacturer, triggers the actuator (5) to move the wire cutter (4) from the first position (I) to the second position (II) or from the second position (II) to the first position (I). As a result that the control unit (7) processes and compares the data transmitted by the sensor (6) with the rotational speed of the rotor (3) determined by the manufacturer, the wire cutter (4) can move automatically from the first position (I) to the second position (II) or from the second position (II) to the first position (I) (Figure 1 , Figure 2).

In an embodiment of the invention, the wire cutter system (1) comprises a pulley (8) on the body (2); a belt (9) that transfers the rotational movement of the rotor (3) to the pulley (8); a first chamber (10) containing a fluid; the actuator (5) which is located on the pulley (8) and moves into the first chamber (10) with the centrifugal force created by the rotational movement of the pulley (8); a second chamber (11) that allows application of force to a lower surface (S) of the wire cutter (4) by means of the fluids contained therein; a conveying line (12) that allows the wire cutter (4) to move from the second position (II) to the first position (I) by carrying fluid from the first chamber (10) to the second chamber (11) by means of the actuator (5) moving into the first chamber (10). Thanks to the belt (9) and pulley (8) system provided on the body (2) and triggered by the rotor (3), the rotational speed of the rotor (3) is transmitted mechanically to the actuator (5), and thus the wire cutter (4) can be activated without using electronic systems (Figure 3).

In an embodiment of the invention, the wire cutter system (1) comprises the body (2) which is a rotary wing air vehicle; at least one body surface (13) where the body (2) is opposite to the wings; the wire cutter (4) extending from the body surface (13) to the wings in the first position (I). Therefore, it is ensured that the wings on the body (2) continue to operate without being damaged by obstacles during flight (Figure 4).

In an embodiment of the invention, the wire cutter system (1) comprises a connector (14) which enables the wire cutter (4) to be movably attached to the body (2); the wire cutter

(4) that moves from the first position (I) to the second position (II) or from the second position (II) to the first position (I) by rotating around the connector (14) (Figure 4).

In an embodiment of the invention, the wire cutter system (1) comprises the control unit (7) that enables the wire cutter (4) to move to the first position (I) or the second position (II) by triggering the actuator (5) with the input provided by the user. Therefore, the wire cutter (4) can be moved depending on the user's request.

In an embodiment of the invention, the wire cutter system (1) comprises the wire cutter (4) that is moved from the first position (I) to the second position (II) or from the second position (II) to the first position (I) by rotating around its own axis by means of the actuator

(5).

In an embodiment of the invention, the wire cutter system (1) comprises an outer surface (15) on the wire cutter (4), which remains congruent with the body surface (13) when the wire cutter (4) is in the second position (II). Since the outer surface (15) remains congruent with the body surface (13), the wire cutter (4) is enabled to form a more aerodynamic surface in the second position (II) without protruding on the body (2) (Figure 6). In an embodiment of the invention, the wire cutter system (1) comprises the wire cutter (4) located between the body (2) and the landing gears. In an embodiment of the invention, the wire cutter system (1) comprises the actuator (5), which is an electric motor.

In an embodiment of the invention, the wire cutter system (1) comprises the body (2), which is a helicopter.

In an embodiment of the invention, the wire cutter system (1) comprises a deflector (16) on the body (2), which is triggered by the actuator (5) to guide the cables moved to the first position (I) or the second position (II) on the body (2) without cutting the cables. In this way, the cables can be guided to the wire cutters (4) without being stuck on the body (2).