Helicopter with main and auxiliary rotors
First Claim
Patent Images
1. A remote control toy helicopter comprising:
- a body;
a motor and a battery for the motor, the motor being controllable by a controller remote from the helicopter body;
a main rotor with propeller blades which is driven by a rotor shaft on which the blades are mounted, and a joint of the main rotor being a spindle which is fixed to the rotor shaft of the main rotor;
an auxiliary rotor driven by the rotor shaft of the main rotor for rotation in the sense of rotation of the main rotor;
a second rotor which is driven by a second rotor shaft;
the auxiliary rotor being provided with two vanes extending essentially in a line with their longitudinal axis, the auxiliary rotor being mounted in a swinging relationship on an oscillatory shaft which is provided essentially transversally to the rotor shaft of the main rotor and being directed essentially transversally to the longitudinal axis of the vanes;
the main rotor and the auxiliary rotor being connected to each other by a mechanical link, such that the swinging motion of the auxiliary rotor controls the angle of incidence of at least one of the rotor blades of the main rotor; and
an actuator for engaging with a control assembly depending from the auxiliary rotor, the inter-engagement of the actuator and control assembly effecting a change in the angle of incidence of at least one vane of the auxiliary rotor.
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Abstract
A remote control toy helicopter has a main rotor and an auxiliary rotor both driven by a rotor shaft. The auxiliary rotor has elongated elements at an acute angle relative to blades of the main rotor. A control system is provided that includes an actuator for engaging with a control assembly depending from the auxiliary rotor. The inter-engagement of the actuator and the control assembly effects change in the angle of incidence of the elongated elements of the auxiliary rotor. The interaction occurs when the assembly engages with the actuator by a depending arm associated with the assembly.
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Citations
22 Claims
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1. A remote control toy helicopter comprising:
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a body; a motor and a battery for the motor, the motor being controllable by a controller remote from the helicopter body; a main rotor with propeller blades which is driven by a rotor shaft on which the blades are mounted, and a joint of the main rotor being a spindle which is fixed to the rotor shaft of the main rotor; an auxiliary rotor driven by the rotor shaft of the main rotor for rotation in the sense of rotation of the main rotor; a second rotor which is driven by a second rotor shaft; the auxiliary rotor being provided with two vanes extending essentially in a line with their longitudinal axis, the auxiliary rotor being mounted in a swinging relationship on an oscillatory shaft which is provided essentially transversally to the rotor shaft of the main rotor and being directed essentially transversally to the longitudinal axis of the vanes; the main rotor and the auxiliary rotor being connected to each other by a mechanical link, such that the swinging motion of the auxiliary rotor controls the angle of incidence of at least one of the rotor blades of the main rotor; and an actuator for engaging with a control assembly depending from the auxiliary rotor, the inter-engagement of the actuator and control assembly effecting a change in the angle of incidence of at least one vane of the auxiliary rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A remote control toy helicopter comprising:
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a body; a motor and a battery for the motor, the motor being controllable by a controller remote from the helicopter body; a main rotor with propeller blades which is driven by a rotor shaft on which the blades are mounted, and a joint of the main rotor being a spindle which is fixed to the rotor shaft of the main rotor; an auxiliary rotor driven by the rotor shaft of the main rotor for rotation in the sense of rotation of the main rotor; a tail rotor which is driven by a second rotor shaft directed transversally to the rotor shaft of the main rotor; the auxiliary rotor being provided with two elongated rotor elements extending essentially in a line with their longitudinal axis, the auxiliary rotor being mounted in a swinging relationship on an oscillatory shaft which is provided essentially transversally to the rotor shaft of the main rotor and being directed essentially transversally to the longitudinal axis of the vanes;
two elongated rotor elements extending essentially in a line with their longitudinal axis in the sense of rotation of the main rotor is essentially parallel to the longitudinal axis of at least one of the rotor blades of the main rotor or is at a relatively small acute angle relative to the axis,the main rotor and the auxiliary rotor being connected to each other by a mechanical link, such that the swinging motion of the auxiliary rotor controls the angle of incidence of at least one of the rotor blades of the main rotor; and wherein the longitudinal axis of the elongated rotor elements of the auxiliary rotor in the sense of rotation is located within an angle of about 45 to 15 degrees, and preferably about 25 degrees with the longitudinal axis of one of the rotor blades of the main rotor and wherein the auxiliary rotor is located relatively below the main rotor. - View Dependent Claims (14, 15, 16, 17)
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18. A remote control toy helicopter comprising:
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a body; a motor and a battery for the motor, the motor being controllable by a controller remote from the helicopter body; a main rotor with propeller blades which is driven by a rotor shaft on which the blades are mounted; an auxiliary rotor driven by the rotor shaft of the main rotor for rotation in the sense of rotation of the main rotor; a second rotor which is driven by a second rotor shaft; and the auxiliary rotor being driven by the rotor shaft of the main rotor and being provided with two vanes extending essentially in a line with their longitudinal, the auxiliary rotor being mounted in a swinging relationship on an oscillatory shaft which is provided essentially transversally to the rotor shaft of the main rotor and being directed essentially transversally to the longitudinal axis of the vanes, and the main rotor and the auxiliary rotor are connected to each other by a mechanical link, such that the swinging motion of the auxiliary rotor controls the angle of incidence of at least one of the rotor blades of the main rotor, and a control for moving the angle of incidence of at least one blade of the rotor cyclically along at least part of a 360 degree rotation path around a rotor shaft, causing a variation in lift force of the blade along the rotations path such that the swinging motion of the auxiliary rotor controls the angle of incidence of at least one of the propeller blades of the main rotor, and a joint of the main rotor to the propeller blade formed of a spindle which is fixed to the rotor shaft of the main rotor, such that the angle between the plane of rotation of the auxiliary rotor and the rotor shaft may vary; an actuator for moving the angle of incidence of at least one vane of the auxiliary rotor relative to the angle of incidence of a blade of the main rotor cyclically along at least part of a 360 degree rotation path around the rotor shaft, and wherein a length of an actuator arm relative to a length of a control assembly from a location of anchoring the rotor to the shaft effects the degree of interaction with the control assembly and the degree of change of angle of inclination of the at least one vane; and wherein the longitudinal axis of the vanes of the auxiliary rotor in the sense of rotation is located within an angle of about 45 to 15 degrees, and preferably about 25 degrees with a longitudinal axis of the propeller blades of the main rotor.
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19. A rotor assembly for a remote control toy helicopter, comprising:
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a motor and a battery for the motor, the motor being controllable by a controller remote from the helicopter body; a main rotor having two propeller blades mounted on a rotor shaft for rotation with the rotor shaft; an auxiliary rotor mounted on the rotor shaft for rotation in the sense of rotation of the main rotor, the auxiliary rotor being mounted in a swinging relationship on an oscillatory shaft provided essentially transverse to the rotor shaft of the main rotor and the swinging motion being relatively upwardly and downwardly about the oscillatory shaft; the main rotor and the auxiliary rotor having planes of rotation spaced from each other and being linked with each other by a mechanical linkage, such that the swinging motion of the auxiliary rotor controls an angle of incidence of the propeller blades of the main rotor; wherein at least one propeller blade of the main rotor is for pivotably mounting on a spindle which is fixed on the rotor shaft; an actuator for moving the angle of incidence of at least one elongated rotor element of the auxiliary rotor cyclically along at least part of a 360 degree rotation path around the rotor shaft, such that the angle between the plane of rotation of the at least one elongated rotor element of the auxiliary rotor and the rotor shaft may vary; and wherein the auxiliary rotor includes flanges, the flanges being for interaction with an element of the control assembly thereby to change the elongated rotor element incidence angle. - View Dependent Claims (20, 21, 22)
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Specification