Abstract: A wheel skid having an arcuate base for facilitating mobility of a vehicle on terrain where wheels ordinarily sink into the terrain, and/or otherwise become directed in a direction other than the desired direction of travel of such vehicles, and where wheeled transportation is otherwise difficult or impossible, and hazardous. The wheel skid has an arcuate base having a slot, a wheel assembly having a wheel, the slot having the wheel of the wheel assembly protruding therethrough, and a fastener fastening the wheel assembly thereto the wheel skid. The wheel skid may be supplied as a complete unit and/or as an accessory skid for retrofit installations.

Abstract: A caster structure for cases including a coupling frame and a plurality of rollers. The coupling frame is comprised of a curved plate and two protective covers extending from the lateral edges of the bottom side of the plate such that they define a clearance therebetween. The rollers are pivotally mounted on the protective covers in the clearance. The outer circumferences of every two adjacent rollers form a level line and may come into contact with the ground surface simultaneously to facilitate pulling and provide a steadier movement.

Abstract: This invention relates to a goods-handling cart having chassis provided with a drive and steer wheel together with two swivelling stabilizing wheels, and at least one spring-effect element which acts on both of the stabilizing wheels via a mechanism that transmits a downwardly-directed vertical force to the stabilizing wheels, the mechanism is not attached to the wheels but merely bears thereagainst via simple contact surfaces engaging respective mounting elements for mounting the wheels in such a manner that the mechanism is free to move away from one or other of the mounting elements in a direction opposite to the direction in which the spring-effect element acts; retaining mechanism being associated with each wheel to limit displacement thereof in a downwards direction relative to the chassis.

Abstract: A concealable baggage caster comprises a caster housing fastened to the bottom edge of a baggage and provided therein with a space for housing a caster and a caster frame. The caster housing is provided respectively in the left and the right side walls thereof with an elongate slot, a pivoting hole and a locating hole. The caster is pivoted between the two lugs of the caster frame which is mounted on a shaft received in the pivoting holes of the caster housing and the pivoting holes of the caster frame. An action plate is fastened pivotally to the action holes of the caster frame. Two guiding pieces and two fevers are pivoted respectively on the two pivoting shafts which are slidably received in the elongate slots of the caster housing. Each of two levers has a central fulcrum hole dimensioned to receive therein a shaft which is also received in the locating holes of the caster housing.

Abstract: A movable table is provided which includes a table top; two bench seats; a leg support assembly pivotally connected to the table top and the bench seats; four primary casters disposed below the leg support assembly and mounted to the assembly; and four auxiliary casters. The leg support assembly supports the table top and bench seats in an open and in a closed configuration; and it allows a user to place the table in these two positions. The auxiliary casters stabilize the table in the closed position when it begins to tip over. In addition, these auxiliary casters allow the primary casters to easily skip over obstacles.

Abstract: A rolling support system has a pair of wheels mounted for rotation about a first axis with bearings that have a first resistance to rotation of the wheels. A stem assembly includes a portion to which the first axis is attached and further includes a thrust bearing having a second resistance to rotation. The second resistance to rotation being lower than the first resistance to rotation so that during movement of the system, the first resistance to rotation is effective to move the wheels into alignment with the direction of travel. To reduce noise as well as to reduce potential damage to an underlying surface, the periphery of each wheel may include a tire.

Abstract: A stair-climbing wheelchair carrier has a frame body, a pair of rail frames formed in a lower portion of the frame body and a pair of endless belt crawlers engaged with the wheels provided on the frame body and with the rail frames. A travelling wheel mechanism is provided on each of the rail frames at a rear portion thereof. The travelling wheel mechanism comprises a lever rotatably mounted on the rail frame, a pair of travelling wheels provided on both ends of the lever, and a spring for maintaining said travelling wheels in a position parallel with the grounding surface of the crawlers. Both the travelling wheels are so disposed that contact points with the ground are at lower positions than the grounding surface of the crawlers.

Abstract: An auxiliary wheel is mounted on a lift truck caster wheel assembly to normally be carried above the floor, but to engage the floor to prevent overturning, thereby increasing the lateral stability of the truck.

Abstract: A spring member comprises an annular polymeric structure 1 interrupted by gap 3 to define annular structure ends 4 provided with attachment adaptions, external at 8 and internal at 6. Thus wheel 12 journalled at 7 in extension 6 is resiliently mounted by virtue of the elasticity of the annular structure material. Proportions, dimensions and materials can be varied over a wide range of applications. A particularly valuable application of such a C-shape spring is in the provision of a resiliently mounted castor wheel with a resiliently mounted pilot wheel giving easy passage up over a door sill or the like.