Fixture for aligning and clamping pipes
First Claim
1. Fixture for aligning and clamping pipes end to end to enable joining of the pipes by welding at the juncture of the pipes comprising a collar circumscribing one of said pipes, circumferentially spaced arms extending from said collar toward said juncture, and a clamping member supported on each of the arms for holding said pipes together end to end, each of the arms terminating in support means engaging the clamping member support by the arm, said support means and said clamping members having a sliding connection therebetween permitting the collar and said arms to slide along said pipe away from said clamping members after the latter have been installed to hold the pipes together.
2 Assignments
0 Petitions
Accused Products
Abstract
A fixture for aligning clamping pipes end to end to enable joining the pipes by welding includes a collar circumscribing one of the pipes and circumferentially spaced arms extending outwardly from the collar and then coaxially with the pipes. Pipe damps are supported by each of the arms at approximately 120 degrees intervals about the pipe. The stems of the clamps are supported by the arms such that proper orientation of the clamping shoes and guide members is assured. Furthermore, an extension of the stem which projects between the pipes and carries an inner guide member for engagement with the inner circumferential surface of the pipe has a differential thickness such that the pipes are initially separated by a predetermined thickness by engagement of the pipes with the necked portion of the extension for tack welding. After tack welding is complete, the stems are rotated 90 degrees, thereby bringing a narrower dimension of the necked portion into registry with the gap between the pipes, permitting withdrawal of the stems.
-
Citations
26 Claims
- 1. Fixture for aligning and clamping pipes end to end to enable joining of the pipes by welding at the juncture of the pipes comprising a collar circumscribing one of said pipes, circumferentially spaced arms extending from said collar toward said juncture, and a clamping member supported on each of the arms for holding said pipes together end to end, each of the arms terminating in support means engaging the clamping member support by the arm, said support means and said clamping members having a sliding connection therebetween permitting the collar and said arms to slide along said pipe away from said clamping members after the latter have been installed to hold the pipes together.
- 15. Fixture for aligning and clamping pipes end to end to enable joining of the pipes by welding at the juncture of the pipes comprising a collar circumscribing one of said pipes, circumferentially spaced arms extending from said collar away from said juncture, and a clamping member supported on each of the arms for holding said pipes together end to end, each of said clamping members including a stem extending from a corresponding arm radially inwardly with respect to the pipes, one end of the stem carrying clamping means for engaging and clamping said pipes, the other end of said stem being supported by a corresponding one of the arms, each of the arms terminating in support means engaging said stem, said support means permitting relative sliding movement between the stem and the arm, each of said support means including an open-ended slot slidably supporting said stem.
- 18. Fixture for aligning and clamping pipes end to end to enable joining of the pipes by welding at the juncture of the pipes comprising a collar circumscribing one of said pipes, circumferentially spaced arms extending from said collar away from said juncture, and a clamping member supported on each of the arms for holding said pipes together end to end, each of said clamping members including a stem extending from a corresponding arm radially inwardly with respect to the pipes, one end of the stem carrying clamping means for engaging and clamping said pipes, the other end of said stem being supported by a corresponding one of the arms, said clamping means including a shoe carried on each of said stems, said shoe extending axially with respect to said pipes and having a pair of axially separated engagement surfaces, each of said engagement surfaces engaging the outer diameter of one of said pipes to assure axial alignment of the latter, and means carried on said stem for urging the shoe into engagement with the pipes, each of said shoes being slidable along its corresponding stem, but is fixed against rotation relative thereto.
- 20. Welding clamp for aligning and clamping pipes end to end to enable joining of the pipes by welding at the juncture of the pipes comprising a stem, an extension extending from said stem through said juncture when the clamp is used, an inner guide carried on the extension for engagement with the inner circumferential surface of each of said pipes, a shoe carried on said stem and having a pair of engagement surfaces, each of said engagement surfaces engaging the outer circumferential surface of said pipes, and means carried on said stem for urging the shoe into engagement with the outer circumferential surfaces of the pipes and the inner guide into engagement with the inner circumferential surface of the pipes, said extension having a cross section having edges separated by larger and smaller lateral dimensions to permit said extension to control the width of a gap defined between said pipes at said interface between said pipes, said shoe being slidable along said stem but being fixed against rotation with respect thereto.
- 25. Welding clamp for aligning and clamping pipes end to end to enable joining of the pipes by welding at the juncture of the pipes comprising a stem member, an extension member extending from said stem member through said juncture when the clamp is used, an inner guide carried on the extension member for engagement with the inner circumferential surface of each of said pipes, a shoe carried on said stem member and having a pair of engagement surfaces, each of said engagement surfaces engaging the outer circumferential surface of said pipe, and means carried on said stem member for urging the shoe into engagement with the outer circumferential surfaces of the pipes and the inner guide into engagement with the inner circumferential surface of the pipes, and a releasable connection between said extension member and said stem member to permit removal and replacement of the extension member when the extension member is worn.
Specification