Fixture for aligning and clamping pipes

Work holders – Holder inserted within work aperture – Inserted holder movable relative to work backup

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269 43, 29271, B23Q 100

Patent

active

055732291

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.

REFERENCES:
patent: 3422519 (1969-01-01), Fehlman
patent: 3901497 (1975-08-01), Dearman
patent: 3952936 (1976-04-01), Dearman
patent: 4175734 (1979-11-01), Williams
patent: 4175735 (1979-11-01), Griffin
patent: 4611743 (1986-09-01), Williams
patent: 5067696 (1991-11-01), Morley
patent: 5351404 (1994-10-01), Smith
patent: 5415659 (1995-05-01), Lee et al.
Publication NBS--Tech Note #253 Nov. 1964 Haegele --"Minature Gear, Flange and Bearing Puller".

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