Vehicles are disclosed which have a lower center of gravity than existing all-terrain, amphibious, and unmanned ground vehicles due to the location of propulsion units and other vehicle components inside the wheels of the vehicle. The vehicles can climb over large obstacles yet are also able to corner at high speeds. The vehicles can be configured for direct manual operation or operation by remote control, and can also be configured for a wide variety of missions.

A hollow wheel assembly of a luggage includes a wheel mount, two wheel members, and a hollow shaft. The wheel mount has a shaft sleeve, in which the hollow shaft is received. The wheel members are connected to opposite ends of the hollow shaft for free rotation. The hollow shaft has a vision passage, and the wheel members have a plurality of vision bores, whereby one may see through the wheel members via the vision bores and the vision passages when the wheel members are rotating.

The present invention relates to a bicycle training wheel assembly that uses uniquely, spherical wheel made of rubber or polyurethane substances of optimal consistency for this utility, as opposed to using the conventional cylindrical wheel. The foregoing properties of the said spherical wheel provide bounce and shock absorption. This invention allows the rider to obtain better balance and stability while learning to ride the bicycle. The assembly attaches to both sides of the rear wheel axle of the bicycle.

A releasable wheel assembly includes a bracket having multiple bosses, each boss including a hole that receives an axle. A pair of wheels are mounted on the axle and a pair of locking caps fit over respective ends of the axle, the locking caps each including a clip for engaging the axle at a circumferential groove to prevent movement of the locking cap along the axle. The wheel assembly can be mounted to a carry bag or other storage unit by mounting the bracket to the storage unit, where the wheels and axle can be easily removed from the bracket.

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 hybrid wheel including a functional rim, a center disc, and a wheel face insert, wherein the wheel rim and the center disc are made of a specified material, and wherein the wheel face insert is made of a dissimilar material. The wheel face insert can be secured to the center disc by at least one of screws, pins, rivets, or structural adhesive, and/or the wheel face insert can be secured to the functional rim by at least one of screws, pins, rivets, or structural adhesive.

The present invention relates to a coating and a frame for wheels. The coating has a hollow cylindrical configuration and extends radially between inner and outer portions. The outer portion acts as a tread element and confers the ability to maintain, in use, contact with the ground, to such coating. The inner portion defines a plurality of engagement elements. The frame comprises a hub, a crown and a supporting element which operates in connection between the hub and the crown. The crown is arranged peripherally with respect to the hub and acts as a support element for the coating when the coating is applied to the frame so as to externally encircle the crown. The crown defines a plurality of engagement elements. The engagement elements of the coating and the crown create an interference-type coupling between the coating and the frame, generating forces in the tangential direction.

A trolley case capable of displaying weight in a static state allows the bracket fixing shaft not to offset in a radial direction through the configurations of a directional bearing and shaft liner, and allows a weighing transducer to sense the weight of a case body accurately by installing the weighing transducer on the directional bearing and fixing the weighing transducer to the upper end face of the bracket fixing shaft, thereby not causing a weight displaying value to change, realizing a static display, and thus giving users the convenience of use.

The invention provides a wheel having a disk-shaped substrate having a first surface, a second surface and a periphery; and a radially extending channel formed within the substrate, wherein the channel has a closed end adapted to encircle an axle and an open end which terminates at the periphery such that the channel extends from the first surface to the second surface. Also provided is a method for installing and uninstalling wheels having the steps of supplying a wheel having a reversibly deformable radially and transversely extending channel having a first width, whereby the channel is adapted to frictionally and slidably receive an axle, urging the axle into the channel and toward the center of the wheel, whereby the channel reversibly expands to a second width to accommodate the axle; and allowing the axle to reside at the center of the wheel while the channel reverts to the first width.

A wheel assembly includes a wheel axle, an inner wheel, and an outer wheel. The inner wheel is mounted on the wheel axle. The inner wheel is rotatable about the wheel axle. The inner wheel is rotatably retained in the outer wheel. The inner and outer wheels include a gap therebetween, and the outer wheel is rotatable eccentrically about the wheel axle.