Core for a pipe that is to be bent
AssigneeW. Eckold AG
InventorTheodor Molz
Life of this patent
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Abstract
The pipe-bending core consists of elements which are coupled to one another in articulated manner and threaded like a string of pearls on a wire cable, and which are expanded on being pushed against one another, but nevertheless remain articulated. The principle can be applied to pipes of differing cross-section. After releasing the bracing arrangment, the elements contract again by means of spring bias, so that the core can easily be withdrawn from the bent pipe.
Claims14
Core for a pipe that is to be bent, comprised of elements that are coupled to one another in articulated manner, characterized in that there are arranged on a wire cable (10) separate wedge elements which are themselves articulated and, between successive wedge elements, expanding elements that can be expanded transversely to the extension of the cable, the wedge elements can be pushed together in the direction of extension of the cable with the expanding elements being expanded, each of such wedge elements being comprised of a joint member of round cross-section at least in the bending plane of the pipe and a semi-wedge member arranged at each side, having a bearing face complementary to the cross-section of the joint member.
Dependencies are inferred from the claim text.