A pedaled drivetrain includes a drive mechanism, a wheel, a freewheel hub, and a locking mechanism. The wheel has a rotational axis. The freewheel hub connects the drive mechanism to the wheel, and the freewheel hub transmits torque from the drive mechanism to the wheel in a first rotational direction around the rotational axis. The locking mechanism has a locked state and an unlocked state. The locked state rotationally fixes a component of the drive mechanism to the wheel relative to the rotational axis.

A pedaled drivetrain includes a drive mechanism, a wheel, a freewheel hub, and a locking mechanism. The wheel has a rotational axis. The freewheel hub connects the drive mechanism to the wheel, and the freewheel hub transmits torque from the drive mechanism to the wheel in a first rotational direction around the rotational axis. The locking mechanism has a locked state and an unlocked state. The locked state rotationally fixes a component of the drive mechanism to the wheel relative to the rotational axis.

A clutch or brake system for a torque transmission. The clutch or brake system includes a first rotatable unit connectable to an input or output, including at least one first abutment surface and a second rotatable unit connectable to an output or input, respectively, including at least one second abutment surface arranged for selectively engaging the first abutment surface. The first and second abutment surfaces are adapted to each other so as to allow disengaging under load. The system includes a third rotatable unit including at least one retaining member, the third unit being arranged for selectively being in a first rotational position or a second rotational position relative to the second rotatable unit, wherein the at least one retaining member in the first rotational position locks the at least one second abutment surface for rotationally coupling the second rotatable unit to the first rotatable unit.

A coupling arrangement for coupling members as a gear change coupling in a gear mechanism unit includes a first member and a second member. The first member has a coupling toothing system. At least one locking body arrangement is mounted pivotably on the second member. The locking body arrangement can be pivoted into a coupling position, in the case of which a driving section on the locking body arrangement engages into the coupling toothing system. The locking body arrangement can be pivoted into a release position, in the case of which the driving section of the locking body arrangement does not engage into the coupling toothing system. The locking body arrangement has a locking body carrier which is mounted pivotably on the second member, and has a locking body member which is mounted pivotably on the locking body carrier and on which the driving section is configured.

A coupling arrangement for coupling members as a gear change coupling in a gear mechanism unit includes a first member and a second member. The first member has a coupling toothing system. At least one locking body arrangement is mounted pivotably on the second member. The locking body arrangement can be pivoted into a coupling position, in the case of which a driving section on the locking body arrangement engages into the coupling toothing system. The locking body arrangement can be pivoted into a release position, in the case of which the driving section of the locking body arrangement does not engage into the coupling toothing system. The locking body arrangement has a locking body carrier which is mounted pivotably on the second member, and has a locking body member which is mounted pivotably on the locking body carrier and on which the driving section is configured.

A transmission system, such as for a two wheeled bicycle, having an input and an output, wherein the input is arranged to be connected to a crank and/or an electric motor and/or a user input, and wherein the output is arranged to be connected to a driven wheel. The system includes at least two parallel transmission paths from the input to the output, at least one of the transmission paths including at least one transmission, at least one of the transmission paths including at least one transmission clutch. At least one of the transmission paths includes at least one load-shifting clutch, the at least one load-shifting clutch being a form closed clutch arranged to transfer torque in at least one rotational direction.

A locking device for preventing freewheeling of an aeration fan rotor. The locking device comprises an elongated body having a predetermined length. The elongated body is adapted for being disposed through an opening of a fan housing containing the aeration fan rotor therein such that in a first position a first end portion of the elongated body is enabled to interact with the aeration fan rotor for preventing freewheeling of the aeration fan rotor and a second opposite end portion of the elongated body is placed outside the fan housing. The locking device further comprises means for holding the elongated body in the first position and a second position such that in the second position the first end portion of the elongated body is prevented from interacting with the aeration fan rotor.

A locking device for preventing freewheeling of an aeration fan rotor. The locking device comprises an elongated body having a predetermined length. The elongated body is adapted for being disposed through an opening of a fan housing containing the aeration fan rotor therein such that in a first position a first end portion of the elongated body is enabled to interact with the aeration fan rotor for preventing freewheeling of the aeration fan rotor and a second opposite end portion of the elongated body is placed outside the fan housing. The locking device further comprises means for holding the elongated body in the first position and a second position such that in the second position the first end portion of the elongated body is prevented from interacting with the aeration fan rotor.

A new type of mechanism for human powered and electric-assist bicycles, provided within its rear wheel hub, that transfers drive motion from the drive-train to the wheel, while allowing non ratcheting freewheeling when coasting.

The mechanism uses of a pair of face gears, with the first gear fixed within the hubshell, while the second gear is rotary fixed but allowed to move axially within the freehub. The second gear is attached to prismatic sliding joints with springs, coiled over a shaft fixed to the hubshell.

Rotating the freehub in the forward direction by the drive-train, rotates the second gear, sliding on the prismatic joints to axially dispose it towards the first gear until they couple and transfer drive. When the freehub rotates in the opposite direction relative to the hubshell, the second gear moves away from the first gear, transferring an unwinding motion to the coiled springs that start to slip on the rotating shaft, allowing freewheeling.

A pedaled drivetrain includes a drive mechanism, a wheel, a freewheel hub, and a locking mechanism. The wheel has a rotational axis. The freewheel hub connects the drive mechanism to the wheel, and the freewheel hub transmits torque from the drive mechanism to the wheel in a first rotational direction around the rotational axis. The locking mechanism has a locked state and an unlocked state. The locked state rotationally fixes a component of the drive mechanism to the wheel relative to the rotational axis.