Abstract: A human-powered vehicle (100, 560) includes a structural frame (105) supported on multiple road wheels including driven wheels (110) each rotatable about an axle for propulsion, a seat (115) secured to the frame (105, 554) for supporting an operator, a hand crank (250) disposed above the driven wheel (110) and rotatable by hand by an operator seated in the seat (115), and a steerable rear wheel (120) operably linked to the seat (115) such that pivoting of the seat (115) about a seat pivot axis causes pivoting of the rear wheel (120) to steer the vehicle (100, 560).

Abstract: A human-powered vehicle includes a driven wheel with a cantilevered hub, and a hand-operable crank for vehicle propulsion. In a wheelchair the hand cranks are supported on towers that are lowerable to fit under a desk or table. With the vehicle at rest, cranking motion of the crank in a first rotational direction propels the vehicle forward and cranking motion of the crank in a second rotational direction propels the vehicle backward. With the vehicle in forward motion, cessation of crank rotation allows free rotation of the wheel, and crank torque applied in a sense opposing forward vehicle motion applies a braking force to the wheel. An electric vehicle includes a transmission wheel hub that provides similar functions with an electric drive, such as for a wheelchair.