The invention relates to a clamping device (1) for fixing a wheelchair drive unit to a wheelchair frame. The clamping device (1) comprises a lever element (4), a first clamping jaw (2), a second clamping jaw (3) and a clamping jaw holder (5). The first clamping jaw (2) and the second clamping jaw (3) are movably mounted on the clamping jaw holder (5) via a jaw path (D.sub.0-D.sub.2) between an open position (D.sub.0) and a closed position (D.sub.2). The lever element (4) is movably coupled to the first clamping jaw (2) and the second clamping jaw (3) via a lever path (S.sub.H) such that a movement of the lever element (4) along the lever path (S.sub.H) causes the clamping jaws (2, 3) to move along the jaw path (D.sub.0-D.sub.2). A transmission arrangement couples the lever element (4) to the first clamping jaw (2) and the second clamping jaw (3) in such a way that, starting from the open position (D.sub.0) of the clamping jaws (2, 3), moving the lever element (4) by half the lever path (S.sub.H/2) causes the first clamping jaw (2) and the second clamping jaw (3) to move by more than half the jaw path (D.sub.0-D.sub.2/2) in the direction of the closed position (D.sub.2) of the clamping jaws (2, 3).

The invention relates to a clamping device (1) for fixing a wheelchair drive unit to a wheelchair frame. The clamping device (1) comprises a lever element (4), a first clamping jaw (2), a second clamping jaw (3) and a clamping jaw holder (5). The first clamping jaw (2) and the second clamping jaw (3) are movably mounted on the clamping jaw holder (5) via a jaw path (D.sub.0-D.sub.2) between an open position (D.sub.0) and a closed position (D.sub.2). The lever element (4) is movably coupled to the first clamping jaw (2) and the second clamping jaw (3) via a lever path (S.sub.H) such that a movement of the lever element (4) along the lever path (S.sub.H) causes the clamping jaws (2, 3) to move along the jaw path (D.sub.0-D.sub.2). A transmission arrangement couples the lever element (4) to the first clamping jaw (2) and the second clamping jaw (3) in such a way that, starting from the open position (D.sub.0) of the clamping jaws (2, 3), moving the lever element (4) by half the lever path (S.sub.H/2) causes the first clamping jaw (2) and the second clamping jaw (3) to move by more than half the jaw path (D.sub.0-D.sub.2/2) in the direction of the closed position (D.sub.2) of the clamping jaws (2, 3).

Drifting karts in accordance with embodiments of the invention are described that include a front wheel drive train and rear caster wheels that can be dynamically engaged to induce and control drift during a turn. One embodiment of the invention includes a chassis to which a steering column is mounted, where the steering column includes at least one front steerable wheel configured to be driven by an electric motor, a battery housing mounted to the chassis, where the battery housing contains a controller and at least one battery, wiring configured to provide power from the at least one battery to the electric motor, two caster wheels mounted to the chassis, where each caster wheel is configured to rotate around a rotational axis and swivel around a swivel axis, and a hand lever configured to dynamically engage the caster wheels to induce and control drift during a turn.

Drifting karts in accordance with embodiments of the invention are described that include a front wheel drive train and rear caster wheels that can be dynamically engaged to induce and control drift during a turn. One embodiment of the invention includes a chassis to which a steering column is mounted, where the steering column includes at least one front steerable wheel configured to be driven by an electric motor, a battery housing mounted to the chassis, where the battery housing contains a controller and at least one battery, wiring configured to provide power from the at least one battery to the electric motor, two caster wheels mounted to the chassis, where each caster wheel is configured to rotate around a rotational axis and swivel around a swivel axis, and a hand lever configured to dynamically engage the caster wheels to induce and control drift during a turn.

The disclosed system may include a non-transitory memory and one or more hardware processors configured to execute instructions from the non-transitory memory to perform operations including (1) determining one or more vibration signals detected by a personal mobility vehicle, (2) determining that the one or more vibration signals correspond to a particular type of pathway for the personal mobility vehicle, (3) generating a feedback signal corresponding to the particular type of pathway, and (4) transmitting the feedback signal corresponding to the particular type of pathway. Various other methods, systems, and computer-readable media are also disclosed.

The disclosed system may include a non-transitory memory and one or more hardware processors configured to execute instructions from the non-transitory memory to perform operations including (1) determining one or more vibration signals detected by a personal mobility vehicle, (2) determining that the one or more vibration signals correspond to a particular type of pathway for the personal mobility vehicle, (3) generating a feedback signal corresponding to the particular type of pathway, and (4) transmitting the feedback signal corresponding to the particular type of pathway. Various other methods, systems, and computer-readable media are also disclosed.

A pump-action mobility and exercise device may include a pumping arm attached to a foot slide. As the pumping arm is actuated, the foot slide moves forward and rearward in response to the pumping action. The foot slide can also be moved by a user's foot movement. The foot slide may be connected to a drive mechanism that selectively engages a chain or belt that loops around a drive wheel arranged on an axle of the vehicle. When the drive mechanism catches and moves the belt or chain in a forward direction, the axle rotates in a forward direction to drive the vehicle forward. A reverse mechanism may also be provided that selectively causes the drive mechanism to catch and drive the belt or chain in an opposite direction.

A pump-action mobility and exercise device may include a pumping arm attached to a foot slide. As the pumping arm is actuated, the foot slide moves forward and rearward in response to the pumping action. The foot slide can also be moved by a user's foot movement. The foot slide may be connected to a drive mechanism that selectively engages a chain or belt that loops around a drive wheel arranged on an axle of the vehicle. When the drive mechanism catches and moves the belt or chain in a forward direction, the axle rotates in a forward direction to drive the vehicle forward. A reverse mechanism may also be provided that selectively causes the drive mechanism to catch and drive the belt or chain in an opposite direction.

The invention concerns a wheeled vehicle (10) which is able to regulate its lateral tilt. In a preferred aspect the vehicle (10) comprises a seat (28) for supporting a rider, and a chassis (18) which carries the seat. A steerable wheel (12) is carried by the chassis and is operably coupled to a steering arrangement (30, 34) for turning the steerable wheel (12) to effect steering of the vehicle (10). A left wheel-bearing arm (66) carries a left wheel (14) and is pivotally coupled to the chassis (18), so that pivotal movement of the left wheel-bearing arm (66) provides up and down movement of the left wheel (12) relative to the chassis (18). A right wheel-bearing arm (68) carries a right wheel (16) and is pivotally coupled to the chassis (18) to be movable independently of the left wheel-bearing arm (66), so that pivotal movement of the right wheel-bearing arm (68) provides up and down movement of the right wheel (16) relative to the chassis (18). A left control line (76) is led from a left tether (79) on the left wheel-bearing arm (66) to an actuator (84) carried by the chassis (18), so that upward movement of the left wheel (14) relative to the chassis is restrained by the control line (18). A right control line (82) is led from a right tether (78) on the right wheel-bearing arm (68) to the actuator (84), so that upward movement of the right wheel (16) relative to the chassis (18) is restrained by the right control line (82). The actuator (84) is operable in a first direction to pay out the left control line (76) whilst drawing in the right control line (82), permitting the left wheel (14) to move up relative to the chassis (18) and causing the right wheel (16) to move down relative to the chassis (18), thereby causing the vehicle (10) to tilt toward the left. The actuator (84) is operable in a second direction to pay out the right control line (82) whilst drawing in the left control line (76), permitting the right wheel (16) to move up relative to the chassis (18) and causing the left wheel (14) to move down relative to the chassis (18), thereby causing the vehicle (10) to tilt toward the right.