Abstract: The item of footwear (10) is provided with a roller (50) to enable the item of footwear to roll over a surface when the rolling means is in a first active position. The item of footwear (10) has a slide yoke (34) for retracting the roller (50) to a second latent position, thereby disabling the roller and preventing the item of footwear from rolling over a surface (see FIG. 2).

Abstract: A conveyor system for loading pallets into and out of a vehicle includes an accumulating conveyor and airbag rail. The accumulating conveyor is constituted by a pair of chain rails for supporting and conveying pallets into and out of a vehicle. The airbag rail is positioned between the chain rails and adjacent to one of the chain rails. The airbag rail is constituted by a base beam, a lift beam and an airbag positioned between the two beams. The arrangement is such that, with the chain rails and the base beam fixed to the floor of a vehicle, the airbag can be inflated to raise the lift beam so as to lift an edge portion of a pallet supported by the two chain rails out of contact with one of the chain rails.

Abstract: The item of footwear (10) is provided with rolling means (52, 54) to enable the item of footwear to roll over a surface when the rolling means is in a first active position. The item of footwear (10) has retracting means (34) for retracting the rolling means (52, 54) to a second latent position, thereby disabling the rolling means and preventing the item of footwear from rolling over a surface (see FIG. 2).

Abstract: A conveyor system for loading pallets into and out of a vehicle comprises an accumulating conveyor and an airbag rail. The accumulating conveyor is constituted by a pair of chain rails for supporting and conveying pallets into and out of a vehicle. The airbag rail is positioned between the chain rails and adjacent to one of the chain rails. The airbag rail is constituted by a base beam, a lift beam and an airbag positioned between the two beams. The arrangement is such that, with the chain rails and the base beam fixed to the floor of a vehicle, the airbag can be inflated to raise the lift beam so as to lift an edge portion of a pallet supported by the two chain rails out of contact with said one chain rail.