A robot cleaner includes: a body having a suction port; a plurality of wheels for movement of the body; and a plurality of driving devices configured to drive the plurality of wheels, respectively, wherein each of the plurality of wheels includes an inner wheel and an outer wheel having a thickness that is larger than a thickness of the inner wheel, and each of the inner wheel and the outer wheel includes a plurality of slits.

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.

An adjustable highchair. The adjustable highchair includes attachments for seating multiple children simultaneously for convenience when seating multiple children for feeding or other activities. An interchangeable chair assembly is attachable to a height adjustable stem. Each chair assembly includes one or more seats that support a child.

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 rim section 18 is provided with e disk section 20 and is secured to a jig by patting the disk section 20 as the lower side. By allowing a groove section 40 (an engaging section) provided along a circumferential direction of the inner peripheral surface 21 of the rim section 18 to engage with a bent end section 48 of a reinforced member 14 attached from the upper side of the jig, the reinforced member 14 can be easily positioned on the inner peripheral surface 21 of the rim section 18.

A soft sided container with a wheel assembly securable to the sidewalls of the container. The wheel assembly is formed from a cage bearing rotatably coupled to a hub. The hub, formed integral with a base plate, engages an internally positioned mounting plate, eliminating the need for a cross axle. The use of a large hub limits rotation to an outer circumference of the wheel assembly.

The present disclosure relates to a reinforced pivot pin receptacle, specifically made of plastic or other non-metal material and a method for adhering planar element to a cardboard surface, specifically wherein the planar element is made of plastic.

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.

A wheel to axle securement system (WASS) that facilitates securing a vehicle wheel to an axle, or removal of a vehicle wheel from an axle. The WASS includes a wheel hub with a centered opening, an axle, and a quick release ball lock pin that is dimensioned to be inserted into an axle insert within the axle. The wheel hub is placed onto the axle through the opening such that the axle end is adjacent an outer surface of the hub. The lock pin has at least two balls that extend from or retract into the pin's shaft. A button on the pin actuates an internal assembly. When the button is released, the balls extend outward. Once the hub is on the axle, the pin button is depressed and the pin is inserted into the axle insert. When the button is released the balls are located adjacent and in contact with the end of the axle insert, which functions as a barrier that precludes the pin from being removed from the insert. Once the pin is in place, the hub is secured onto the axle.

A furniture rotary system for a piece of furniture is provided. The furniture rotary system is forming a sliding rotary connection between a rotational member and a stationary member wherein said furniture rotary system comprises at least one sliding surface being coated with a lacquer comprising a resin, wherein said lacquer in turn is at least partly coated with a lipophilic composition coating to provide a slide layer with a lowered friction.