A hub with disengaging effect of ratchet faces in an idle mode includes: a gear barrel with first and second housing parts is located at the spacing from the driven end of the hub; a ratchet disc fixed in the driven end has a first annular ratchet face corresponding to the gear barrel; a double-sided free toothed disc disposed in the first housing part is in synchronous rotation with the gear barrel, and includes a second annular ratchet face, which is in a single steering engagement drive relationship with the first annular ratchet face; an elastic expansion member is disposed between the ratchet and double-sided free toothed discs, to push off annular ratchet faces in idle mode; a repulsion disc is mounted in the second housing part at the circumferential direction; an axial repulsion member has repulsion parts which are respectively disposed in the double-sided free toothed and repulsion discs.

An electrical passenger car, the electrical passenger car including: at least two electrically driven motors; speed control electronics; and wheels, where the wheels include a front wheel and a back wheel, where the back wheel radius is at least 20% greater than the front wheel radius, where the speed control electronics control the at least two electrically driven motors to provide a greater torque to the front wheel than to the back wheel, and where the speed control electronics control the at least two electrically driven motors to provide a greater torque to the back wheel than to the front wheel.

An electrical passenger car, the electrical passenger car including: at least two electrically driven motors; speed control electronics; and wheels, where the wheels include a first front wheel, a second front wheel, a first back wheel, and a second back wheel, where the first back wheel radius is at least 20% greater than the first front wheel radius, where the speed control electronics control the at least two electrically driven motors to provide a greater torque to the first front wheel than to the first back wheel, and where the electrical passenger car is designed to travel for a greater distance for the same axial to wheel friction energy loss than a similar electrical passenger car having wheels of a smaller radius.

The present disclosure provides a bicycle hub that provides improved drive line efficiency and bike-to-rider torque feedback. The drive line efficiencies are due to lower rolling resistance resulting from a novel bearing and sprag clutch configuration, a lightweight design, and immediate torque transfer from the cassette drive to the hub body. The bike-to-rider feedback has been improved as the torque transfer is smooth, predictable, and immediate.

A materials handling equipment has blades of a lifting fork wherein each of the blades engages a blade wheel that moves between a retracted position when the blade is lowered and an extended position when the blade is raised to lift and support a load. The blade wheels have a plurality of tires linearly aligned on a common axis, the tires each having a circular circumference and a sinusoidally varying peripheral surface. The sinusoidally varying peripheral surfaces have relative peaks and valleys uniformly spaced around the circular circumference wherein the peaks and valleys are mutually nested.

The present disclosure relates to a bicycle hub, and more particularly, to a levitating bicycle hub coupling structure using a magnet in the internal contact structure in order to upgrade the levitating non-contact type structure to reduce friction and enable the position of a hub inner shaft member for transmitting the load of a user to an inner bearing part and the like to be changed to an upper or lower preset position, and fixes the same at a changed position so as to offset the load applied to the shaft member by the repulsive force of the magnets, such that the load is not applied to the bearing parts positioned at both sides of the shaft member or is significantly reduced so as to improve rolling performance, and thus riding of the bicycle becomes smoother and easier; or has first and second internal magnet parts formed at the outer peripheries of both sides of the housing rotating by being connected to bicycle wheels, and has first and second external magnet parts corresponding to the first and second internal magnet parts so as to generate repulsive force, such that when the user gets on the bicycle, an eccentric load transmitted to the shaft member through a bicycle frame is supported by the repulsive force, thereby enabling the prevention of load being applied to the bearing parts.

An electrical passenger car, the electrical passenger car including: at least two electrically driven motors; speed control electronics; and wheels, where the wheels include a first front wheel, a second front wheel, a first back wheel, and a second back wheel, where the first back wheel radius is at least 20% greater than the first front wheel radius, where the speed control electronics control the at least two electrically driven motors to provide a greater torque to the first front wheel than to the first back wheel, and where the electrical passenger car is designed to travel for a greater distance for the same axial to wheel friction energy loss than a similar electrical passenger car having wheels of a smaller radius.

Low-friction sealing assembly for a vehicle wheel-hub unit inserted inside an annular interspace defined between a flanged rotating element and a stationary element, coaxial with each other, of the wheel-hub unit to protect at least one ring of revolving bodies arranged between the stationary element and the rotating element, and having a first annular screen and a second annular screen during use integral with the rotating element and with the stationary element; and an annular seal having lips that extend axially and radially projecting from the first screen towards the second screen inside an annular chamber defined by the first and second screens; the sealing assembly being a multi-stage sealing assembly provided with a first inner collecting stage designed to collect and expel some of the contaminants.

An electrical passenger car, the electrical passenger car including: an electrically driven motor; and wheels, where the wheels include a first wheel, a second wheel, a third wheel, and a fourth wheel, where the first wheel and the second wheel have a radius 20 percent larger than the third wheel and the fourth wheel, where the electrical passenger car includes a total weight, where the electrical passenger car includes a center of gravity designed so that greater than 50% of the total weight will be over the first wheel and the second wheel, where the electrical passenger car is designed to travel for a greater distance for the same axial to wheel friction energy loss than a similar electrical passenger car having wheels of a smaller radius, and where the second wheel width is equal to or less than the third wheel width.

A patient transport apparatus comprises a support structure comprising a base and a patient support surface for supporting a patient and a caster assembly coupled to the base. The caster assembly comprises a wheel assembly. The wheel assembly includes a first edge, a second edge, and a center disposed between the first edge and the second edge. Each of the edges have a lower coefficient of friction than the center. The caster assembly further includes a tilt assembly coupled to the wheel assembly. The tilt assembly is configured to allow the wheel assembly to tilt relative to a floor surface such that at least one of the first and second edges contact the floor surface.