A three-layer soft rubber shock absorbing wheel including a hub. An outer surface of the hub is bonded with a hard body, a first layer of tread and a second layer of tread having a hardness lower than that of the first layer of tread. The hard body, the first layer of tread, and the second layer of tread are arranged from inside to outside in sequence. The second layer of tread is bonded in a concave surface portion on an outer surface of the first layer of tread. The first layer of tread and the second layer of tread are both elastic bodies. The hard body is configured to have an I-shaped structure body. The three-layer soft rubber shock absorbing wheel is a wheel body made by bonding three layers of materials with different hardness.

A braking system having a rotating element that rotates about an axis, and a braking device for braking the rotating element. The braking device has a first braking element that is movable between a rest position and a braking position and has an annular braking surface which is arranged concentrically with respect to the axis and has a brake disc which is co-rotationally connected to the rotating element and has first and second frictional surfaces. The annular braking surface of the first braking element is arranged at a distance from the brake disc in the rest position, and is in contact with the first frictional surface thereof in the braking position. A second braking element is arranged such that in the braking position the first braking element presses the brake disc against the second braking element such that the second braking element is in contact with the second frictional surface.

A wheeled luggage case comprises (a) a storage chamber, (b) a cover defining an opening on at least one side of the storage chamber for providing ready access therein and at least two labyrinth axle-free wheels operatively connected to the chamber for towing the case along a ground surface. The labyrinth axle-free wheel comprises an internal rim, an external rim provided with a ground interface, rollers being rotatably disposed within a roller spacer between the internal and external rims in a uniform circumferential manner by means of a spacer and external covers. A labyrinth type dust passage in the wheel is defined by the rims and the external plates mechanically connected to the internal rim.

A spinner wheel assembly for a luggage case is provided. The wheel assembly may include a housing, a support strut rotatably coupled to the housing about a spinner axis, and a plurality of wheels each rotatably coupled to the support strut about a wheel axis. Each wheel may rotate in a plane positioned at an angle to at least one other wheel. Each wheel may be coupled to the support strut in a spaced relationship thereto.

An axle-free wheel comprising: an outer rim member having a ground interface on an external surface thereof and an outer ball race or rolling race on an inner surface thereof; an inner rim member having an inner ball or rolling race on an outer surface thereof.

A wheeled collapsible canopy with foldable support frame. The wheeled collapsible canopy includes at least two wheeled legs and also at least two non-wheeled legs. A protective cover covers the top of the collapsible canopy when the collapsible canopy is in a folded state. The protective cover extends only partially down the length of the folded support frame.

A wheel rim assembly includes a rim defining a rim opening, a wheel disk disposed in the rim opening, a plurality of first fastening members fastening the wheel disk to the rim, and a plurality of second fastening members. The wheel disk includes a center disk defining a center bore that is coaxial with the rim, and a plurality of spokes interconnecting the center disk and the rim. The first fastening members fasten the spokes to the rim such that removal of the first fastening member permits separation of the spoke from the rim. The second fastening members fasten the spokes to the center disk such that removal of the second fastening member permits separation of the spoke from the center disk.

A patient transport apparatus transports a patient over a floor surface. The patient transport apparatus comprises a support structure and support wheels coupled to the support structure. An auxiliary wheel is coupled to the support frame to influence motion of the patient transport apparatus over a floor surface. The auxiliary wheel is movable to a deployed position with the auxiliary wheel engaging the floor surface and a stowed position with the auxiliary wheel spaced a distance from the floor surface. An actuator assembly including a lift actuator a biasing device, and a biasing load adjustment assembly. The lift actuator is operable to move the auxiliary wheel to the deployed position and to the stowed position. The biasing device configured to bias the auxiliary wheel towards the deployed position. The biasing load adjustment assembly configured to adjust a biasing force being applied by the biasing device to the auxiliary wheel.

A bicycle disc wheel includes two discs respectively formed of two composite material layers with a foam material bonded between the two composite material layers, a wheel frame arranged between the two discs in a concentric manner; and a spoke frame composed of a plurality of I-shaped ribs and sandwiched between the two discs. Each I-shaped rib is composed of a foam material and a composite material cladded on the foam material. Each I-shaped rib has a relatively wider opposite upper and lower sides and a relatively narrower middle section when it is viewed from the cross section, and the relatively wider opposite upper and lower sides of each I-shaped rib are respectively attached to the respective inner side of the two discs.

An autonomous mobile device has a main body and an extensible mast to raise and lower a payload, such as a camera, relative to the main body. The mast may comprise a set of telescoping sections, with each section comprising two or more pieces that are joined during assembly. A motor moves a flexible rack between a first spool and the mast to raise or lower the mast. For example, during extension a motor-driven pinion engages teeth on the flexible rack, pulling the rack from the first spool and pushing up the mast. A cable stored on a second spool may be extended and retracted with the flexible rack. The cable transfers one or more of data or power between the main body and the payload. A sensor may be used to detect features on the flexible rack to provide data about how far the flexible rack has been extended.