Disclosed is a rotation transmission mechanism including: an internal rotation member inserted by a crankshaft of a bicycle; and an external rotation member configured on the internal rotation member. The internal rotation member includes: an internal rotation member body. The external rotation member includes: a circular ring part configured at an outer side of the outer circumferential convex parts; and inner circumferential convex parts protruding to an inner circumferential side of the circular ring part and configured alternately with the outer circumferential convex parts. Elastic deformation parts are configured between the outer circumferential convex parts and the inner circumferential convex parts on a rotation direction side of the advancing outer circumferential convex parts. The outer circumferential convex parts are formed in such a manner that a surface on the rotation direction side is greater than a surface on an opposite side of the rotation direction.

A bicycle crank assembly has a rotational center axis and comprises a crank member, a sprocket member, a sliding mechanism, a first stopper member, a second stopper member and a damping member. The crank member rotatably is arranged around the rotational center axis. The sprocket member is integrally and rotatably attached to the crank member. The sliding mechanism movably coupling the sprocket member in an axial direction with respect to the crank member. The first stopper member is attached to the crank member. The second stopper member is attached to the sprocket member. The damping member is attached to at least one of the first stopper member and the second stopper member. The damping member is configured to contact the other of the first stopper member and the second stopper member while the sliding mechanism is in operation.

The invention relates to an equipment for a bicycle wheel. The equipment comprises at least one profiled wing-shaped projection adapted to be secured to the inner surface of the rim of the wheel.

The invention relates to an equipment for a bicycle wheel. The equipment comprises at least one profiled wing-shaped projection adapted to be secured to the inner surface of the rim of the wheel.

A bicycle crank assembly has a rotational center axis and comprises a crank member, a sprocket member, a sliding mechanism, a first stopper member, a second stopper member and a damping member. The crank member rotatably is arranged around the rotational center axis. The sprocket member is integrally and rotatably attached to the crank member. The sliding mechanism movably coupling the sprocket member in an axial direction with respect to the crank member. The first stopper member is attached to the crank member. The second stopper member is attached to the sprocket member. The damping member is attached to at least one of the first stopper member and the second stopper member. The damping member is configured to contact the other of the first stopper member and the second stopper member while the sliding mechanism is in operation.

The invention relates to a continuously variable automatic transmission that modifies the transmission ratio thereof by means of the accumulation and conversion of potential and kinetic energy. The transmission, which is functionally formed around a device accumulating elastic potential energy (6) with a controlled (7) output (2), has an inflow system (5) suitable for distributing the energy that is absorbed, and an outflow system (9) suitable for delivering the potential energy that has been absorbed and converting it into kinetic energy. The accumulator of elastic potential energy is formed around an elastic spiral spring, the inlet thereof being arranged so as to only allow the inflow of energy and the outlet thereof so as to control the energy delivery.

The invention relates to a continuously variable automatic transmission that modifies the transmission ratio thereof by means of the accumulation and conversion of potential and kinetic energy. The transmission, which is functionally formed around a device accumulating elastic potential energy (6) with a controlled (7) output (2), has an inflow system (5) suitable for distributing the energy that is absorbed, and an outflow system (9) suitable for delivering the potential energy that has been absorbed and converting it into kinetic energy. The accumulator of elastic potential energy is formed around an elastic spiral spring, the inlet thereof being arranged so as to only allow the inflow of energy and the outlet thereof so as to control the energy delivery.

A bicycle simulator (1) is basically constituted by a bicycle pre-arranged for static or pseudo-static use. The bicycle comprises front and rear supports (13, 14) for resting on the floor (12) that simulate the contact of the wheels of a normal bicycle on the road. The two supports are preferably constituted by a front supporting wheel (13) and by a rear supporting wheel (14) that rest on the floor and support in a freely rotatable way the respective wheel axles (3, 11). Rotatably mounted within at least the front supporting wheel is a flywheel (F1, F2). The front flywheel (F1) is set in rotation by a respective electric motor (M) or by a transmission driven by the pedals, for creating a stabilizing gyroscopic effect, which enables the user to maintain his balance when pedaling with the bicycle stationary, resting on the floor via the supporting wheels in a static condition. The crank axle is connected to a driven member, which is independent of said front support (13) and of said rear support (14) and is constituted by a rear flywheel or even by the front flywheel itself.

A bicycle simulator (1) is basically constituted by a bicycle pre-arranged for static or pseudo-static use. The bicycle comprises front and rear supports (13, 14) for resting on the floor (12) that simulate the contact of the wheels of a normal bicycle on the road. The two supports are preferably constituted by a front supporting wheel (13) and by a rear supporting wheel (14) that rest on the floor and support in a freely rotatable way the respective wheel axles (3, 11). Rotatably mounted within at least the front supporting wheel is a flywheel (F1, F2). The front flywheel (F1) is set in rotation by a respective electric motor (M) or by a transmission driven by the pedals, for creating a stabilizing gyroscopic effect, which enables the user to maintain his balance when pedaling with the bicycle stationary, resting on the floor via the supporting wheels in a static condition. The crank axle is connected to a driven member, which is independent of said front support (13) and of said rear support (14) and is constituted by a rear flywheel or even by the front flywheel itself.

A bicycle includes a frame, rear wheel, suspension system of the rear wheel with respect to the frame that allows a predetermined relative displacement between them, and drivetrain system for transmitting the motion from a crankset to the rear wheel. The drivetrain system includes a crankset fixed to the frame, a hub and pinion assembly fixed to the rear wheel that is rotatable about a common pivot axis thereof, and a drive chain placed to connect them directly to each other. The crankset and hub and pinion assembly are subjected to reciprocal displacement by the action of the suspension system, where at least one among the crankset and the hub and pinion assembly has a free stroke device placed to allow both a forward and backward free angular stroke of the chain with respect to the respective pivot axes of the crankset and/or of the hub and pinion assembly.