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US 4,288,906 AGranted
Pipe jointing
AssigneeDunlop Limited
InventorsPhilip J. Cocks, Derek A. Newton
Life of this patent
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AssigneeDunlop Limited
InventorsPhilip J. Cocks, Derek A. Newton
Estimating the term…
A method and apparatus is provided whereby a joint can be made on site between two flanged pipe ends by winding a ductile metal strip over the flanged ends so that lateral portions of the strip are deformed radially inwardly behind the flanges to entrap them together. The apparatus takes the form of a frame 10 rotatably supporting an annular member 11 which can be brought coaxially to surround the pipe ends. A ductile metal strip is drawn from a reel 17 on the frame and passes in succession between rollers 15 and the flanged pipe ends, the rollers 15 having a progressively more waisted profile so as to bring the strip progressively to a channel shape enclosing the pipe flanges. As the strip is wound spirally over the pipe ends masking 33 is removed from an adhesive ribbon whereby superimposed turns of the strip are bonded together.
A method of forming a joint between pipes having respective increased diameter end formations the method comprising winding a ductile metal strip wider than the two end formations over the end formations, bending the lateral portions of the strip downward toward the pipes behind the formations so that the formations are locked together by an enclosure formed by the wound and deformed strip which has reduced diameter lateral portions on opposite sides of the formations.
Dependencies are inferred from the claim text.