An airless tire includes a cylindrical tread ring having a ground contact surface, a hub disposed radially inward of the tread ring and a plurality of spokes each connecting the tread ring to the hub. The hub includes a disk portion to be fixed to an axle and a cylindrical portion extending in an axial direction of the tire from a radially outer portion of the disk portion. The cylindrical portion includes a radially inner surface being provided with a circumferentially extending projection protruding radially inwardly.

An airless tire includes a cylindrical tread ring having a ground contact surface, a hub disposed radially inward of the tread ring and a plurality of spokes each connecting the tread ring to the hub. The hub includes a disk portion to be fixed to an axle and a cylindrical portion extending in an axial direction of the tire from a radially outer portion of the disk portion. The cylindrical portion includes a radially inner surface being provided with a circumferentially extending projection protruding radially inwardly.

A wheel with a suspension system being connectable to a vehicle, like a wheel chair. The wheel includes a hub and a rim rotatable about the axle of the hub. Between the hub and the rim, a number of support members is located. The support members are adapted to retain the distance when stressed up to a threshold value and recoverly alter the distanced when stressed over this threshold value. Exemplary support members are spring elements, damping strokes by compression if the support member is compressed or elongated. The spring elements may be preloaded.

A wheel assembly for traversing a path along a ground surface having a layer of soil, the wheel assembly comprising a central support and an airless flexible covering mounted on the central support and having a plurality of rigid sections and a plurality of flexible sections. The outwardly protruding spokes urge the rigid sections into the layer of soil when the rigid sections contact the ground surface. The flexible sections flex inwardly when the flexible sections contact the ground surface so that the rigid sections and the flexible sections cooperatively form a corrugated pattern in the ground surface without urging the soil to side margins of the airless flexible covering, the corrugated pattern having a plurality of valleys formed by the rigid sections and a plurality of peaks formed by the flexible sections.

A connecting member (15) includes connecting plates (21, 22) configured to connect an attachment body and a ring-shaped body (13), a plurality of curved sections (21d to 21j, 22d to 22j) curved in a tire circumferential direction are formed at the connecting plates (21, 22) in a direction in which the connecting plates (21, 22) extend in a side view of a tire when seen from a tire width direction, and in the plurality of curved sections (21d to 21j, 22d to 22j) of one of the connecting plates (21, 22), the thickness of a maximum curved section having largest central angles (d to j) about a center of curvature of the curved section (21d to 21j, 22d to 22j) is maximized, and the thickness of a minimum curved section having the smallest central angles (d to j) is minimized.

The invention relates to a vehicle wheel assembly, comprising 1) a wheel rim having two opposed circular rim flanges; 2) an outer tire having two beads secured at the circular rim flanges; 3) a non-pneumatic inner tire comprising expanded thermoplastic polyurethane (E-TPU), which inner tire is enclosed by the outer tire and the wheel rim; characterized in that the inner tire in the assembly is in a compressed state S1, which state is compressed as compared to a relaxed state S2 when the inner tire is not enclosed by the outer tire, the compression being such that the cross-sectional surface area SA of the inner tire, which area is perpendicular to the plane of the tire, is smaller in state S1 than in state S2.

The invention relates to a vehicle wheel assembly, comprising 1) a wheel rim having two opposed circular rim flanges; 2) an outer tire having two beads secured at the circular rim flanges; 3) a non-pneumatic inner tire comprising expanded thermoplastic polyurethane (E-TPU), which inner tire is enclosed by the outer tire and the wheel rim; characterized in that the inner tire in the assembly is in a compressed state S1, which state is compressed as compared to a relaxed state S2 when the inner tire is not enclosed by the outer tire, the compression being such that the cross-sectional surface area SA of the inner tire, which area is perpendicular to the plane of the tire, is smaller in state S1 than in state S2.

A mobile apparatus is provided. The mobile apparatus may include: a body including a material of which a shape is reversibly deformable; a first link rotatably coupled to the body; a second link having one side rotatably coupled to the first link and the other side rotatably coupled to the body; a first shaft provided in a region, in which the first link is rotatably coupled to the body, and inserted into the first link and the body; a second shaft provided in a region, in which the second link is rotatably coupled to the first link, and inserted into the first link and the second link; and a third shaft provided in a region, in which the second link is rotatably coupled to the body, and inserted into the second link and the body.

A mobile apparatus is provided. The mobile apparatus may include: a body including a material of which a shape is reversibly deformable; a first link rotatably coupled to the body; a second link having one side rotatably coupled to the first link and the other side rotatably coupled to the body; a first shaft provided in a region, in which the first link is rotatably coupled to the body, and inserted into the first link and the body; a second shaft provided in a region, in which the second link is rotatably coupled to the first link, and inserted into the first link and the second link; and a third shaft provided in a region, in which the second link is rotatably coupled to the body, and inserted into the second link and the body.

A deformable wheel is disclosed. The deformable wheel includes a hub, at least one resilient member connected to the hub, and a plurality of circumferentially positioned rim portions connected to the at least one resilient member, where each one of the plurality of rim portions is moveable relative to the hub about the at least one resilient member. A track system including the deformable wheel is also disclosed.