A three-wheeled cycle includes a frame and first and second wheels, each rotatably mounted to the frame about substantially a horizontal axis and a vertical axis. A drive wheel is rotatably mounted to the frame about a horizontal axis. Pedal structure is provided for driving the drive wheel. Steering structure is provided for rotating the first and second wheels about their vertical axis. Structure can also be provided to automatically adjust the chamber of the first and second wheels into a turn.

A steering assembly for use with a vehicle having a frame, with the frame being supported by at least one directional support (such as a rotatable wheel, ski, endless flexible track, etc.) that is pivotable about a first axis to steer the vehicle. The steering assembly comprises a first mounting member to which the directional support is secured, the mounting member being secured to the frame of the vehicle for pivotal motion about the first axis. A steering lever is mounted to the frame adjacent to the first mounting member, with the steering lever being pivotable about a second axis perpendicular to the first axis. The steering lever also has a drive pin associated therewith. A pivotable bearing block operatively connects the drive pin to the first mounting member. The bearing block includes a shaft that is received in the mounting block so as to permit rotation of the bearing block with respect to the mounting block about a third axis that is perpendicular to the first axis and is laterally displaced from the second axis. The bearing block includes first and second studs that project therefrom which capture the drive pin. Accordingly, when the steering lever pivots about the second axis, the bearing block pivots about the third axis and both the bearing block and the first mounting member pivot about the first axis, to rotate the directional support, thus effecting steering of the vehicle.

A handcycle having a hand drive mechanism for powering the cycle which includes an attitude control system having an elastomer member serving as a resilient member to resist leaning forces. The system includes adjustability to accommodate weights of various riders so that a proper stabilizing opposing force is applied. An adjustable steering angle mechanism is provided on the handcycle frame permitting smooth movement regardless of the steering angle.

An improved human powered recumbent vehicle is provided. The vehicle includes a frame that comprises a central keel. The keel comprises four tubes that are spaced equidistant from a central longitudinal axis. Outrigger arms are disposed approximately halfway along the longitudinal axis of the keel and extend forwardly and outwardly therefrom. The angle that each outrigger arm forms with the keel, provides an access area that allows a rider access to the seat without having to step over any portion of the invented vehicle, for easy mounting and dismounting. Outboard ends of the arms terminate in pivotable connectors that may be provided for wheel bearing yokes. A rear section of the keel is wide enough to accommodate a wheel. The keel has a prow that terminates in a single plane, so that the vehicle can be placed on its prow for storage in an upright position, to minimize storage space. In a tricycle embodiment, a seat is secured to the top two tubes of the keel, adjacent the juncture of the arms with the keel. This improves the vehicle's balance control. The frame is fabricated using straight tubes, to provide ease of manufacture. In the tricycle embodiment, wheels are spring mounted to yokes provided at the ends of the outrigger arms. The frame is lightweight, easily adaptable to different size riders, and easy to manufacture.

A tricycle, including at least one frame, at least one front wheel, which is disposed in the front region of the frame, when viewed with respect to the preferred travel direction of the tricycle, and is steerable via a steering handle, and at least two rear wheels which are disposed in the rear region of the frame when viewed with respect to the preferred travel direction, wherein pivotal means are provided, which permit the rear wheels to be pivotable.