Abstract: A cutting apparatus of a type where two juxtaposed blades are caused to move through sequential approximately elliptical paths and having teeth at respective outer edges of the two juxtaposed blades the relatively moving teeth on the edge of the respective blades being adapted to be urged against a surface to b cut, and at least one anchoring locator which is positioned beyond a periphery of the respective blades and thereby adapted to engage with a work piece while it is being cut and provide thereby a potential anchoring position for a work piece.

Abstract: An air board including a platform upon which an operator of the vehicle can be supported; and a support arrangement for providing an air flow for supporting the platform above a surface, wherein the direction of movement of the air board is at least partially controlled by varying the weight distribution of the operator on the platform.

Abstract: A cutting apparatus including a generally circular cutting member (1), and support means (2) for supporting the cutting member (1) for movement about a central area, wherein the cutting member (1) is driven in a rolling orbital motion about the central area during operation of the cutting apparatus.