Patent ID: 7798067

Claim:
A turntable for a heavy object, said turntable including: a ground-engaging member; a load-supporting platform, said ground-engaging member and said load-supporting platform each having load surfaces facing each other; and an intermediate load transfer means comprising a cage means rotatably mounted for rotation relative to both said ground-engaging member and said load-supporting platform about a generally vertical axis, the load-supporting platform is supported off the ground-engaging member by said intermediate load transfer means, wherein the cage means holds a plurality of rotatable rollers which are distributed across an extended region of said load surfaces and which are each constrained to rotate about a respective rolling axis which extends generally radially with respect to said generally vertical axis to allow rotation of said load-supporting platform with respect to said ground-engaging member about said generally vertical axis, and said ground-engaging member and said load-supporting platform are each formed from a single sheet member or sheet members attached together, to flex as one and are each configured to flex in use over at least the extended region, whereby the assembly comprising said ground-engaging member said cage means and said load-supporting platform is able to flex in use.