Importance

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Abstract

Vehicle parts of a pipeline pig are connected by a pivotable joint. The joint comprises first and second part-spherical hollow shells joined together, each shell having an aperture therein, said apertures being aligned, said first shell being mounted in a curved recess in said first vehicle part to the pivotable therein part, said second shell being mounted in a curved recess in said second vehicle part to the pivotable therein, the first and second vehicle parts each having ducts leading to the joint and communicating with said apertures and wherein pipeline pig harnessing passes between the vehicle parts through said ducts and said apertures.

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First Claim