A motorized wheelchair includes left and right drive wheels, left and right motors, rate-of-turn sensor, first and second speed sensors, and controller arranged to combine signals from the sensors in a manner that detects drift. Alternatively, the motorize...

A motorized wheelchair includes left and right drive wheels, left and right motors, rate-of-turn sensor, first and second speed sensors, and controller arranged to combine signals from the sensors in a manner that detects drift. Alternatively, the motorize...

The present invention relates to a wheelchair suspension that includes a pivoting assembly. The pivoting assembly includes at least two linkages (319,334). The pivoting assembly is structured so that the drive assists the wheelchair in traversing obstacles...

A suspension (1300) for a vehicle includes a frame (402) and a releasable locking assembly (1314,1322,1318,1320). The releasable locking assembly includes first and second assemblies (1314,1318). The first assembly (1314) is movably coupled to the frame (4...

A wheelchair suspension that inhibits tipping of a wheelchair. The wheelchair suspension prevents upward movement of the front casters with respect to the frame and allows downward movement of the front casters when the wheelchair exhibits a tipping behavi...

A wheelchair (100) for traversing obstacles includes a frame (142), a pivoting assembly, and a drive assembly (136,309). The pivoting assembly has at least one pivot arm (132). The at least one pivot arm includes a first portion pivotally coupled to the fr...

A wheelchair suspension includes a frame, a drive assembly, at least one front caster pivot arm, a front caster, a rear caster, and a stabilizing assembly. The drive assembly is pivotally mounted to the frame at a first pivot axis that is below an axis of ...

A wheelchair suspension includes a frame (142), a pivot arm (132), a front caster (106), and a drive assembly (136) and a drive assembly mounting bracket (308). The pivot arm is pivotally coupled to the frame (142). The front caster (106) is coupled to the...

A suspension for a vehicle is provided. The suspension includes, for example, a frame, at least one drive assembly, and at least one front caster pivot arm. The drive assembly and the at least one front caster pivot arm pivot about a common axis. Torque ap...

A suspension for a vehicle is provided. The suspension includes, for example, a frame, at least one drive assembly and at least one front caster pivot arm. The at least one front caster pivot arm is pivotally mounted to the frame at a pivot axis that is be...