Abstract: A device for harvesting bilberries comprises: a frame including a handgrip portion; a shaking unit, including a hook-shaped portion for grasping a branch of a bilberry plant, wherein the shaking unit is movable relative to the frame with reciprocating motion along an axis of vibration to shake the branch; a motor; a transmission unit, wherein the motor is associated with the transmission unit to vibrate the shaking unit along the axis of vibration at a variable vibrating frequency; a frequency adjustment system drivable by the operator to select the vibration frequency at least between a first frequency and a second frequency, wherein the frequency adjustment system is configured to keep the vibration frequency permanently set at the setting selected by the operator.

Abstract: A variable track wheel comprises a rim suitable for receiving a tire, and a disc through which said wheel is mountable on a hub, said disc being removably secured by fastenings to a connecting member provided in said rim, said connecting member projecting towards a rotation axis of said wheel, said wheel further comprising a plurality of spacers interposed between an annular perimeter zone of said disc and said connecting member of said rim, said disc and said rim being mountable in a plurality of reciprocal axial positions and in a plurality of reciprocal orientations to obtain a variation in the track of said wheel, said wheel further comprising at least one centering device for mutual positioning of said disc and of said rim said centering device comprising a hole and a pin said hole or said pin being provided in said connecting member or in said disc said centering device further comprising a coupling element so conformed as to cooperate with said hole and with said pin for reciprocally coupling said pin

Abstract: A variable track wheel comprises a rim suitable for receiving a tire, and a disc through which said wheel is mountable on a hub, said disc being removably secured by fastenings to a connecting member provided in said rim, said connecting member projecting towards a rotation axis of said wheel, said wheel further comprising a plurality of spacers interposed between an annular perimeter zone of said disc and said connecting member of said rim, said disc and said rim being mountable in a plurality of reciprocal axial positions and in a plurality of reciprocal orientations to obtain a variation in the track of said wheel, said wheel further comprising at least one centering device for mutual positioning of said disc and of said rim said centering device comprising a hole and a pin said hole or said pin being provided in said connecting member or in said disc said centering device further comprising a coupling element so conformed as to cooperate with said hole and with said pin for reciprocally coupling said pin

Abstract: A variable track wheel (1) comprises a rim (2) suitable for receiving a tire, and a disc (3) through which said wheel (1) is mountable on a hub (37), said disc (3) being removably secured by fastenings (6) to a connecting member (4) provided in said rim (2), said connecting member (4) projecting towards a rotation axis (X) of said wheel (1), said wheel further comprising a plurality of spacers (15) interposed between an annular perimeter zone (36) of said disc (3) and said connecting member (4) of said rim (2), said disc (3) and said rim (2) being mountable in a plurality of reciprocal axial positions and in a plurality of reciprocal orientations to obtain a variation in the track of said wheel (1), said wheel (1) further comprising at least one centring device (8; 9) for mutual positioning of said disc (3) and of said rim (2), said centring device (8; 9) comprising a hole (10; 10a; 10b) and a pin (11), said hole (10; 10a; 10b) or said pin (11) being provided in said connecting member (4) or in said disc (3),

Abstract: A variable track wheel (1) comprises a rim (2) suitable for receiving a tyre, and a disc (3) through which said wheel (1) is mountable on a hub (37), said disc (3) being removably secured by fastenings (6) to a connecting member (4) provided in said rim (2), said connecting member (4) projecting towards a rotation axis (X) of said wheel (1), said wheel further comprising a plurality of spacers (15) interposed between an annular perimeter zone (36) of said disc (3) and said connecting member (4) of said rim (2), said disc (3) and said rim (2) being mountable in a plurality of reciprocal axial positions and in a plurality of reciprocal orientations to obtain a variation in the track of said wheel (1), said wheel (1) further comprising at least one centring device (8; 9) for mutual positioning of said disc (3) and of said rim (2), said centring device (8; 9) comprising a hole (10; 10a; 10b) and a pin (11), said hole (10; 10a; 10b) or said pin (11) being provided in said connecting member (4) or in said disc (3),

Abstract: A screw compressor has an electric motor having a given longitudinal axis, and two intermeshing rotors; the electric motor having an output shaft also defining the output shaft of that of the two rotors which is coaxial to the longitudinal axis of the electric motor.