Abstract: A chair is mounted on ball-casters. Each leg of the chair is mounted on a caster wheel that is surrounded by a ring of small metal balls, such as ball bearings, enabling the chair to roll freely without scuffing or scratching the floor or dulling the floor polish, and making it virtually impossible for the occupant to lean back in the chair with any stability.

Abstract: Horse hoof protection against thrush conditions is obtained by depositing onto the horse hoof bottom wall a synthetic organic resin such as a urethane resin through which a medicament that does not block cure of the resin has been, distributed for continuing hoof wall contact. The resin is suitably free flowing into place, conforms to the contours of the hoof bottom wall, and adheres to the wall when cured. The protection by the resin is resilient and softer than the hoof wall and acts to cushion the hoof against shock.

Abstract: New photocationic photoinitiator combinations are described that consist of 2,4,6-triarylpyrylium salts with non-nucleophilic anions and electron donors, that are able rapidly to crosslink unpigmented as well as pigmented mixtures based on cycloaliphatic epoxides to form colourless layers such as lacquers and printing inks without generating interfering and toxic emissions.

Abstract: A support with ball for moving loads, is of the type having a hollow body to which the load is applied and in which a ball is housed, partially coming out from the lower part of the hollow body and free to rotate on a plurality of rolling wheels assembled inside the hollow body and engaging the surface of the ball. At least one of the rolling wheels is positioned on the upper side of the ball and is assemblied on a support which is able to freely pivot around a vertical axis passing through the ball center.

Abstract: An improved caster assembly is provided having a load-bearing bushing rotationally disposed in a caster body and including at least one grooved recess about its perimeter wall. As the bushing rotates relative to the caster body, the grooved recess acts to dislodge dirt and particulate matter disposed between the outer surface of the perimeter wall of the bushing and the inner surface of the bore in the caster body. Rotation dislodges the particulate matter where gravity causes it to fall downwardly away from the bushing where it is displaced from the caster assembly through an open end of the caster body or suitable debris outlet.