Importance

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Abstract

Lower and upper split collars are positioned in engagement with the lower and upper cylindrical surfaces of a pipe and these collars in turn held in lower and upper clamp members. The exterior surfaces of the split collars in engagement with the interior surfaces of the clamp members have decreasing diameters from intermediate points towards opposite ends to define oppositely directed slopes. The interior engaging walls of the clamp members with the split collars are similarly tapered. When a pulling or pushing force is exerted on the pipe between the split collars, a camming action against the exterior walls of the collars is effected by the clamps urging the collars radially inwardly to more tightly grip the pipe so that the pipe is held from axial movement in either direction.

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First Claim