A multidirectional wheel for traversing a surface is provided that includes a magnet and a plurality of rollers disposed around an outer periphery of each of the hubs of the wheels. The rollers are mounted for rotation in a second axial direction that is perpendicular to a first axial direction of the wheel. The rollers are supported by a plurality of magnetically-inducible brackets attached to the hub. The brackets are optimally sized and shaped to reduce the space between the magnetized materials of the wheel and the surface upon which the wheel travels.

An apparatus for transferring driving force at a wheel for a vehicle may include a housing of a constant velocity joint having a center of a first end portion formed to be penetrated and inserted into a hub bearing, and a step formed on an inner peripheral surface of a middle portion of the housing, a hub flange supporting an expansion part by the step by having one end portion coupled to a wheel side and another end portion inserted into the housing to thereby form the expansion part expanded in a radial direction, and a forming member installed in the housing to face the expansion part and having an outer peripheral surface supported by an inner peripheral surface of the housing.

A vehicle wheel having a rim, a hub, a plurality of spokes with at least one of the spokes having a first portion connected the rim and a second portion connected to the hub. The rim includes a spoke bed wall with a radially outboard surface and a spoke hole having a radially outboard entrance and perimeter edge. The spoke extends through the spoke hole and is engaged to the spoke bed wall by an overlie engagement at a bearing interface between a bearing surface of the spoke and the radially outboard surface to limit longitudinally inward displacement between the spoke and spoke bed wall. At least a portion of the bearing interface is laterally outwardly spaced from the first perimeter edge by a lateral distance of at least 0.7 millimeters.

A spoke for an at least partially muscle-powered bicycle and wheel including a spoke where the spoke comprises a spoke body with a hub-side, first end and a rim-side, second end and the first end and the second end are remote from one another. The spoke body is elongated and includes at least one first center region disposed closer to the first end than to the second end, and at least one second center region disposed closer to the second end than to the first end. The first center region and in the second center region of the spoke body each include flattened cross-sections substantially accommodated in a longitudinal plane. In the second center region the spoke body is configured more asymmetric than in the first center region.

A motor drive unit, in which an output end of a motor drive system using an electric motor as a power source and a rotator rotatably supported by a bearing unit are arranged side by side in an axial direction, and the output end of the motor drive system and the rotator are drivingly coupled in a relatively displaceable manner by a coupling member in which a plurality of couplers spaced apart in an axial direction are set. The bearing unit of the rotator is arranged such that a center of displacement of the rotator defined by the bearing unit is located between an arbitrary pair of couplers among the couplers.

Disclosed are: a caster mounted on a teaching aid including a whiteboard, or furniture, etc. so as to conveniently and stably convert between a movement state and a stopping state; and a whiteboard including the caster. The present invention relates to a caster comprising: a wheel which is coupled to the lower end of a fixing shaft having a male screw formed on the upper side thereof so that a nut is fastened; a wheel moving means which comprises a slide member and an eccentric rotation member, wherein the slide member has a shaft hole punched on the central part thereof so as to allow the fixing shaft of the wheel to be penetrated and fastened by the nut, and has a working shaft hole formed on the circumferential surface thereof, and the eccentric rotation member has an eccentric shaft formed at one side thereof and a shaft bolt formed protrudingly from the center part of the other side thereof, the eccentric shaft being fitted into the working shaft hole of the slide member; a main body which comprises a first operating space, a second operating space, a third operating space, and a female screw, wherein the first operating space is penetrated at the central part thereof in the vertical direction so that the slide member is fitted thereto and can move up and down, the second operating space enables the wheel to rotate and move up and down, the third operating space is penetrated in the horizontal direction so that an eccentric member is fitted thereto and the eccentric shaft can be introduced into the first operating space, and the female screw is formed on the upper part of the main body for the fastening purpose; a working lever which has a coupling hole punched on the central part thereof, the coupling hole being fitted into the shaft bolt of the eccentric rotation member; a fixing nut which is screw-coupled to the shaft bolt of the eccentric rotation member so as to fix the working lever; and a fixing means which comprises a first fixing part or a second fixing part so as to prevent the eccentric rotation member fitted into the third operating space of the main body from being detached and stop the rotation of the eccentric rotation member. The caster is mounted on a pedestal fixed to the lower end of a column frame on which the whiteboard is mounted.

Disclosed is a foldable wheel defined about an axis of rotation of the wheel, which includes a closed loop made up of at least two links and, each link being substantially in the shape of a ring sector of section as defined in a plane perpendicular to the axis of rotation of the wheel that in the shape of a trapezoid including two non-parallel faces and, a major base, and a minor base; a unit for mounting the links and to pivot about a pivot axis, including a bearing having two portions and, respectively a pivot pin and a rotary housing, the pin being pivotally mounted in the pivot housing, the male and female bearing portions and being at two points situated in the proximity of the apex of the V-shape, the V-shape being defined by the shape formed by the two facing non-parallel faces of the two links.

A bicycle hub assembly includes a hub axle, a hub shell, and a sprocket supporting member. The sprocket supporting member includes a tubular portion and a first tooth. The tubular portion includes an outer peripheral surface and an attachment portion provided only radially inward of the outer peripheral surface. The first tooth is configured to be attached to the attachment portion of the tubular portion. The first tooth includes a first surface and a second surface. The first surface is configured to face a mounting portion of a bicycle sprocket in a circumferential direction of the sprocket supporting member. The second surface is opposite to the first surface in the circumferential direction. The second surface is configured to face the mounting portion of the bicycle sprocket in the circumferential direction.

A bicycle spoke has a spoke body having two remote ends, a rim end, and a hub end. The elongated body includes a longitudinally flattened cross-section. The body includes a first end portion thickness at the hub end transverse to a longitudinal plane. The body includes a second end portion thickness at the rim-side end transverse to the longitudinal plane. The body includes in a first center region disposed closer to the first end portion than to the second end portion, a first center region thickness transverse to the longitudinal plane that is less than the first end portion thickness. In a second center region disposed closer to the second end portion than to the first end portion, the body has the flattened cross-section wherein the second center region includes a second center region thickness transverse to the longitudinal plane that is less than the first center region thickness.

A hub or wheel assembly includes a retaining element, biasing element, and hand-maneuverable release mechanism. The housing includes an axle bore configured to receive an axle and a pin sleeve including a first end in fluid communication with the axle bore, a second end, and a conduit between the first end and the second end. The retaining element is within the conduit and is configured to operatively engage a groove in an axle. The biasing element is within the conduit and is configured to bias the retaining element towards the axle bore. The hand-maneuverable release mechanism is configured to displace the retaining element away from the axle bore.