Described is a machine (1) for fitting and removing a tyre from a corresponding wheel rim of a vehicle, comprising: a wheel-holder unit (4), which rotates about a first axis (A); at least one bead breaker tool (29), movable along a second axis (B) parallel to the first axis (A); a roller (2) rotating about a fourth axis (D) parallel to the first axis (A) and configured to move by rotation about a fifth axis (E) spaced from the fourth axis (D), between an active position where it is in contact with a tyre tread of the wheel mounted on the wheel-holder unit (4), to a position of non-interference relative to the tyre; at least one sensor (40) connected to the roller (2) for detecting a signal representing a force transmitted to the roller (2) by the tyre; a removal tool (37), which is movable by rotation about a sixth axis (F) parallel to the first axis (A) and spaced from it, between a first position proximal to the first axis (A) and a second position distal from the first axis (A), which is movable in a direction parallel to the first axis (A) and movable towards and away from the sixth axis (F).

Described is a machine (1) for fitting and removing a tyre from a corresponding wheel rim of a vehicle, comprising: a wheel-holder unit (4), which rotates about a first axis (A); at least one bead breaker tool (29), movable along a second axis (B) parallel to the first axis (A); a roller (2) rotating about a fourth axis (D) parallel to the first axis (A) and configured to move by rotation about a fifth axis (E) spaced from the fourth axis (D), between an active position where it is in contact with a tyre tread of the wheel mounted on the wheel-holder unit (4), to a position of non-interference relative to the tyre; at least one sensor (40) connected to the roller (2) for detecting a signal representing a force transmitted to the roller (2) by the tyre; a removal tool (37), which is movable by rotation about a sixth axis (F) parallel to the first axis (A) and spaced from it, between a first position proximal to the first axis (A) and a second position distal from the first axis (A), which is movable in a direction parallel to the first axis (A) and movable towards and away from the sixth axis (F).

A system for converting an input oscillation having an input frequency into an output oscillation having an output frequency is disclosed. The system comprises: a controller configured for receiving the input oscillation and responsively generating a multi-component drive signal. A frequency of at least one component of the drive signal is other than two times the input frequency. In some embodiments, a frequency of another component of the drive signal equals about two times the output frequency. The system also comprises an oscillator for generating pump oscillations responsively to the drive signal and applying parametric excitation to the input oscillation at the pump oscillations.

Described is a machine (1) for fitting and removing a tire from a corresponding wheel rim of a vehicle, comprising: a wheel-holder unit (4), which rotates about a first axis (A); at least one bead breaker tool (29), movable along a second axis (B) parallel to the first axis (A); a roller (2) rotating about a fourth axis (D) parallel to the first axis (A) and configured to move by rotation about a fifth axis (E) spaced from the fourth axis (D), between an active position where it is in contact with a tire tread of the wheel mounted on the wheel-holder unit (4), to a position of non-interference relative to the tire; at least one sensor (40) connected to the roller (2) for detecting a signal representing a force transmitted to the roller (2) by the tire; a removal tool (37), which is movable by rotation about a sixth axis (F) parallel to the first axis (A) and spaced from it, between a first position proximal to the first axis (A) and a second position distal from the first axis (A), which is movable in a direction parallel to the first axis (A) and movable towards and away from the sixth axis (F).

Described is a machine (1) for fitting and removing a tire from a corresponding wheel rim of a vehicle, comprising: a wheel-holder unit (4), which rotates about a first axis (A); at least one bead breaker tool (29), movable along a second axis (B) parallel to the first axis (A); a roller (2) rotating about a fourth axis (D) parallel to the first axis (A) and configured to move by rotation about a fifth axis (E) spaced from the fourth axis (D), between an active position where it is in contact with a tire tread of the wheel mounted on the wheel-holder unit (4), to a position of non-interference relative to the tire; at least one sensor (40) connected to the roller (2) for detecting a signal representing a force transmitted to the roller (2) by the tire; a removal tool (37), which is movable by rotation about a sixth axis (F) parallel to the first axis (A) and spaced from it, between a first position proximal to the first axis (A) and a second position distal from the first axis (A), which is movable in a direction parallel to the first axis (A) and movable towards and away from the sixth axis (F).

A calibration rotor for a horizontal balancer, configured to be driven by a driver. The calibration rotor includes a main barrel that has a longitudinal axis and the periphery of which includes points for attaching balance weights that are evenly distributed in an axial and angular manner about the axis. A rotation guide is arranged at each end of the main barrel. The rotor is modular, and the rotation guide includes adapters (40, 42) which are capable of being configured to be attached to the ends of the barrel. The guide is of a first type, suitable for rotatably guiding the barrel on rollers, or of a second type, suitable for rotatably guiding the half-shell barrel. Each type of adapter has the same predetermined moment of inertia and is interchangeable on the barrel.

A calibration rotor for a horizontal balancer, configured to be driven by a driver. The calibration rotor includes a main barrel that has a longitudinal axis and the periphery of which includes points for attaching balance weights that are evenly distributed in an axial and angular manner about the axis. A rotation guide is arranged at each end of the main barrel. The rotor is modular, and the rotation guide includes adapters (40, 42) which are capable of being configured to be attached to the ends of the barrel. The guide is of a first type, suitable for rotatably guiding the barrel on rollers, or of a second type, suitable for rotatably guiding the half-shell barrel. Each type of adapter has the same predetermined moment of inertia and is interchangeable on the barrel.

A device for pneumatically driving a rotor in a balancing machine has at least one drive nozzle, which is connectable to a compressed-air line and which serves for generating a driving air stream which can be directed onto the rotor, and at least one braking nozzle, which is connectable to a compressed-air line and which serves for generating a braking air flow. The braking air flow can be directed onto the rotor in a direction opposite to the direction of rotation of the rotor. Also a base plate is arrangeable with a spacing to the rotor and on the base plate, the nozzles are movably arranged, such that the spacing between nozzles and rotor is adjustable.

A device for pneumatically driving a rotor in a balancing machine has at least one drive nozzle, which is connectable to a compressed-air line and which serves for generating a driving air stream which can be directed onto the rotor, and at least one braking nozzle, which is connectable to a compressed-air line and which serves for generating a braking air flow. The braking air flow can be directed onto the rotor in a direction opposite to the direction of rotation of the rotor. Also a base plate is arrangeable with a spacing to the rotor and on the base plate, the nozzles are movably arranged, such that the spacing between nozzles and rotor is adjustable.

A lifting apparatus for a vehicle wheel comprising a wheel support which is selectively movable in order to lift or lower a vehicle wheel which is positioned thereon. An actuator group is connected to the wheel support in order to actuate the lifting and lowering thereof. A control unit is operationally connected to the actuator group in order to control the actuation. A lifting sensor member is provided to detect the height of the wheel support. At least one actuation instruction brings about the actuation of the actuator group in order to lift the wheel support from a lowered rest position to a predetermined lifting position, which is detected by the lifting sensor member.