US Patent 7810696 Internal pipe clamp alignment guides with purge backup
Patent 7810696 was granted and assigned to E.I. Du Pont De Nemours And Company on October, 2010 by the United States Patent and Trademark Office.
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This invention relates to an apparatus for clamping adjacent ends of pipe sections to be welded, the apparatus comprising a plurality of clamping members movable between retracted and extended clamping positions, each of the clamping members comprising a clamping shoe and a connecting member connecting the shoe to the apparatus frame; each of the clamping shoes comprising a longitudinal groove on its clamping surface oriented parallel to the adjacent pipe ends, at least one gas passageway through the clamping shoe which extends from a surface of the shoe away from the clamping surface to a termination point within the longitudinal groove, and at least one alignment guide device in the longitudinal groove; a means for delivering an inert purge gas to the longitudinal groove through the gas passageway; and a means for moving the clamping members between the retracted and extended clamping positions.
US Patent 07810696 Internal pipe clamp alignment guides with purge backup US Patent 7810696 Internal pipe clamp alignment guides with purge backup
US Patent 07810696 Internal pipe clamp alignment guides with purge backup
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