PERSONAL SELF-PROPELLED VEHICLE (VERSIONS) Russian patent published in 2007 - IPC A61G5/04 B62D53/02 

FIELD: high-maneuverability vehicles used for transporting of people with limited excursion in premises and in the street.

SUBSTANCE: self-propelled vehicle has carriage with armchair fixed thereon, power source, front rotary wheel, two rear wheels, and control system. Each of said rear wheels is equipped with drive for independent rotation around vertical axis. Each of said drives is fixed on rear part of carriage and connected to wheel support having vertical axis of rotation. Wheel rotation drives are designed for enabling at least two modes of movement. First mode of movement is mode of rotating rear wheels in synchronism with and through angle equal to that of front wheel. At second mode of movement for rear wheels, projections of horizontal axes of rotation of all the wheels onto supporting surface converge to a common point which is center of rotation of vehicle. Angle between projections for rear wheels differs from zero. At second mode, center of rotation is on longitudinal axis of projection onto supporting surface of longitudinal plane of symmetry of vehicle and is spaced from vertical plane of rotation of front wheel by distance L defined by interval of from L=0.1H to L=0.9H, where H is wheel base.

EFFECT: improved maneuverability and minimized vehicle turning area.

15 cl, 19 dwg