Vehicle including a frame, a seat mounted to the frame, wheels rotatably mounted on the frame, and drive mechanisms for causing rotation of one wheel. Each drive mechanism includes an arm pivotally attached to the frame at one end, a weight and attached pedal at an opposite end of the arm, and a guide member including a bump and that moves in conjunction with movement of the weight. The guide member has a first end region at which the guide member is pivotally attached to the frame and a second, opposite end region which is free. A roller attached to the arm moves along the guide member during pivotal movement of the arm to cause pivoting of the guide member as the roller engages with the bump. An energy transfer system converts pivotal movement of the guide member into motive power to rotate the wheel.

A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. A rider handle, in the first mode, may be configured to be rotationally coupled with the stem in a manner permitting a tricycle rider to exert forces on the rider handle and thereby turn the fork, and the rider handle in the second mode, being configured to be rotationally uncoupled from the stem, preventing forces on the rider handle from turning the fork. At least one rotation restricted may be included for preventing the front wheel from turning to a position where the front wheel axis leads the fork axis, and for maintaining the front wheel axis in a position trailing the fork axis both when the tricycle is propelled by a tricycle rider in the first mode and when the tricycle is pushed from behind in the second mode.

Wireless power transfer for integrated cycle drive systems is described. A cycle power system includes a rim that is connected to, and positioned concentrically with, a sealed housing that can rotate about an axis. The cycle power system also includes an integrated drive system disposed within the housing. The integrated drive system includes a battery and a motor for driving a cycle by causing rotational movement of the rim about the axis. Additionally, the cycle power system includes an inductive structure that is disposed within the housing, and that wirelessly charges the battery through induction between the inductive structure and remote a charging station.

Wireless power transfer for integrated cycle drive systems is described. A cycle power system includes a rim that is connected to, and positioned concentrically with, a sealed housing that can rotate about an axis. The cycle power system also includes an integrated drive system disposed within the housing. The integrated drive system includes a battery and a motor for driving a cycle by causing rotational movement of the rim about the axis. Additionally, the cycle power system includes an inductive structure that is disposed within the housing, and that wirelessly charges the battery through induction between the inductive structure and remote a charging station.

A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. In both such first and second modes, the frame of the tricycle is configured to rotatably support the rear wheels and configured to support the head tube at a distance from the rear wheels such that a distance between the head tube and rear wheels need not necessarily be changed even when the front wheel axis location is changed from one mode to another.

A tricycle may be operable between a first mode of operation steerable by a tricycle rider, and a second mode of operation steerable by an individual pushing the tricycle. In both such first and second modes, the frame of the tricycle is configured to rotatably support the rear wheels and configured to support the head tube at a distance from the rear wheels such that a distance between the head tube and rear wheels need not necessarily be changed even when the front wheel axis location is changed from one mode to another.

A bicycle electric device is basically provided to a bicycle crank assembly. The bicycle electric device includes an indicator a process and at least one of a position sensor and a strain sensor configured to be provided on the bicycle crank assembly. The indicator is configured to generate a user signal indicating that a crank arm of the bicycle crank assembly is at a predetermined angular position. The position sensor the strain sensor are configured to be provided on the bicycle crank assembly to detect information of the crank arm. The processor is configured to process information detected by the at least one of the position sensor and the strain sensor to calculate angular force information of the crank arm.

An electric vehicle is provided with a highly simple and convenient structure for detachably retaining a battery, and enabling the vehicle to be lifted by hand. A battery case of the electric vehicle includes an upper extension (80F, 80G) including an upper member (80G) configured to be gripped by a hand for lifting the vehicle, and defining a gripping space (112) for receiving the hand between an upper surface of the battery received in the battery case and the upper member, and a latching structure (102, 106, 120) is provided between an upper part of the battery and an opposing part of the battery case, the latching structure including an operating member (104) positioned inside the gripping space.

A recumbent cycle includes a toothed belt drive system and rear suspension. It also includes a double A-arm suspension assembly and at least one transmission having a planetary gear arrangement.

A recumbent cycle includes a toothed belt drive system and rear suspension. It also includes a double A-arm suspension assembly and at least one transmission having a planetary gear arrangement.