Abstract: A heat exchanger includes a plurality of heat transfer tubes, a liquid header distributor, and a gas header distributor. The heat transfer tubes include U-shaped bent portions. The heat exchanger includes a heat exchanger core. A relationship between the liquid header distributor and the plurality of heat transfer tubes is established such that 9?? is satisfied, where Lh [m] is the length of the liquid header distributor, Lb [m] is the length of the shortest one of the heat transfer tubes, and ? is the ratio of the length Lb of the shortest heat transfer tube to the length Lh of the liquid header distributor and is expressed by ?=Lb/Lh.

Abstract: A swing arm extends rearwardly from an engine, and a pair of side cases is arranged leftwardly and rightwardly of the swing arm. The swing arm is supported at a body frame by a single rear shock absorber. The engine is supported at the body frame by a plurality of vibration absorbing support members. Each vibration absorbing support member has a structure in which a rubber member is arranged between an outer cylinder and an inner cylinder. The engine is attached to the inner cylinder with use of an engine support shaft, and the body frame is attached to the outer cylinder with use of an engine bracket. The rubber member has projections being in contact with an inner surface of the outer cylinder and recesses not being in contact with the inner surface of the outer cylinder. The swing arm is rigidly and pivotally connected to the engine.

Abstract: A swing arm extends rearwardly from an engine, and a pair of side cases is arranged leftwardly and rightwardly of the swing arm. The swing arm is supported at a body frame by a single rear shock absorber. The engine is supported at the body frame by a plurality of vibration absorbing support members. Each vibration absorbing support member has a structure in which a rubber member is arranged between an outer cylinder and an inner cylinder. The engine is attached to the inner cylinder with use of an engine support shaft, and the body frame is attached to the outer cylinder with use of an engine bracket. The rubber member has projections being in contact with an inner surface of the outer cylinder and recesses not being in contact with the inner surface of the outer cylinder. The swing arm is rigidly and pivotally connected to the engine.

Abstract: A bicycle hub gearbox comprises a first planetary gear mechanism and a second planetary gear mechanism and a tubular linking member. The second planetary gear mechanism is operatively coupled with the first planetary gear mechanism. The tubular linking member include a first toothed ring part engaged with the first planetary gear mechanism at a first axial region and a second toothed ring part engaged with the second planetary gear mechanism at a second axial region such that a permanent synchronization between the at least two planetary gear mechanisms is achieved. The first and second toothed ring parts have different diameters and being axially spaced apart.

Abstract: A bicycle hub gearbox is provided for a multi-speed hub with a coaster brake mechanism. The bicycle hub gearbox basically has a first planetary gear mechanism, a second planetary gear mechanism, a braking mechanism and a clutch mechanism. The second planetary gear mechanism is operatively coupled with the first planetary gear mechanism. The braking mechanism is selectively coupled to the first planetary gear mechanism. The clutch mechanism selectively couples an output side of the first planetary gear mechanism to an input side of the second planetary gear mechanism to selectively transmit either a driving torque applied by a rider in a driving direction depending on a selected gear ratio or a braking torque applied by the rider in a braking direction to the braking mechanism independent of a selected gear ratio via one path such that a resulting braking effect is substantially equal independent of the selected gear ratio.

Abstract: A bicycle hub gearbox comprises a first planetary gear mechanism and a second planetary gear mechanism and a tubular linking member. The second planetary gear mechanism is operatively coupled with the first planetary gear mechanism. The tubular linking member include a first toothed ring part engaged with the first planetary gear mechanism at a first axial region and a second toothed ring part engaged with the second planetary gear mechanism at a second axial region such that a permanent synchronization between the at least two planetary gear mechanisms is achieved. The first and second toothed ring parts have different diameters and being axially spaced apart.

Abstract: A bicycle hub gearbox is provided for a multi-speed hub with a coaster brake mechanism. The bicycle hub gearbox basically has a first planetary gear mechanism, a second planetary gear mechanism, a braking mechanism and a clutch mechanism. The second planetary gear mechanism is operatively coupled with the first planetary gear mechanism. The braking mechanism is selectively coupled to the first planetary gear mechanism. The clutch mechanism selectively couples an output side of the first planetary gear mechanism to an input side of the second planetary gear mechanism to selectively transmit either a driving torque applied by a rider in a driving direction depending on a selected gear ratio or a braking torque applied by the rider in a braking direction to the braking mechanism independent of a selected gear ratio via one path such that a resulting braking effect is substantially equal independent of the selected gear ratio.

Abstract: A planet gear carrier for a bicycle hub transmission comprises a first carrier member including a first carrier member axle opening for receiving an axle therethrough. The first carrier member includes plurality of first planet gear openings disposed on a first side of the first carrier member and a plurality of second planet gear openings disposed on a second side of the first carrier member. A separate second carrier member is fastened to the first side of the first carrier member, wherein the second carrier member has a second carrier member axle opening for receiving the axle therethrough. A separate third carrier member is fastened to the second side of the first carrier member, wherein the third carrier member has a third carrier member axle opening for receiving the axle therethrough.

Abstract: A planet gear carrier for a bicycle hub transmission comprises a first carrier member including a first carrier member axle opening for receiving an axle therethrough. The first carrier member includes plurality of first planet gear openings disposed on a first side of the first carrier member and a plurality of second planet gear openings disposed on a second side of the first carrier member. A separate second carrier member is fastened to the first side of the first carrier member, wherein the second carrier member has a second carrier member axle opening for receiving the axle therethrough. A separate third carrier member is fastened to the second side of the first carrier member, wherein the third carrier member has a third carrier member axle opening for receiving the axle therethrough.

Abstract: An internal transmission device for a bicycle. The device includes a slave member, a driver, a planetary gear mechanism disposed between the driver and the slave member, and an automatic shift control mechanism actuated relative to a rotational angle of the driver in a driving direction. The automatic shift control mechanism includes a first one way clutch, a clutch control member and a first abutment member that is disposed on the inner peripheral surface of the slave member.

Abstract: An internal transmission device for a bicycle. The device includes a slave member, a driver, a planetary gear mechanism disposed between the driver and the slave member, and an automatic shift control mechanism actuated relative to a rotational angle of the driver in a driving direction. The automatic shift control mechanism includes a first one way clutch, a clutch control member and a first abutment member that is disposed on the inner peripheral surface of the slave member.

Abstract: A bicycle transmission includes a shaft, a driving part supported about the shaft for coupling to the input part, a driven part supported about the shaft for coupling to the output part, and a planetary gear mechanism disposed between the driving part and the driven part for changing the transmission ratio of the motive force applied from the driving part to the driven part. The planetary gear mechanism comprises a sun gear installed about the shaft, an output gear for transmitting motive force to the driven part, a frame part installed about the shaft and coupled to the driving part, and a planetary gear rotatably coupled to the frame part and disposed between the sun gear and the output gear for engaging the sun gear and the output gear. A clutch comprising a roller is disposed at an intermediate point along the transmission path between the driving part and the driven part for transmitting the motive force from the driving part to the driven part in one direction only.

Abstract: A bicycle transmission includes a shaft, a driving part supported about the shaft for coupling to the input part, a driven part supported about the shaft for coupling to the output part, and a planetary gear mechanism disposed between the driving part and the driven part for changing the transmission ratio of the motive force applied from the driving part to the driven part. The planetary gear mechanism comprises a sun gear installed about the shaft, an output gear for transmitting motive force to the driven part, a frame part installed about the shaft and coupled to the driving part, and a planetary gear rotatably coupled to the frame part and disposed between the sun gear and the output gear for engaging the sun gear and the output gear. A clutch comprising a roller is disposed at an intermediate point along the transmission path between the driving part and the driven part for transmitting the motive force from the driving part to the driven part in one direction only.