Pipe joints or couplings – Molded joint – Interlocked
Patent
1995-01-23
1996-07-16
Nicholson, Eric K.
Pipe joints or couplings
Molded joint
Interlocked
285289, 285397, 285370, 228 50, 228140, F16L 1302
Patent
active
055360505
ABSTRACT:
In the fabricating of a mandrel bar, a plurality of used mandrel bar segments are provided, each of which has a central bore comprising a smooth surface portion and a threaded portion. Each segment has a circumferential recess at an end thereof and a bevelled surface adjoining the recess and extending inwardly of the segment at an angle to the vertical. A coupling has a smooth central boss section and threaded ends. A connection is made by threadedly connecting the ends of the coupling with a pair of opposed mandrel segments, with the smooth boss of the coupling fitting inside the smooth portion of the bore of each segment to effect, with the threaded joint, a straight, tight joint. A weld groove of gull-shaped cross-section is provided between the opposed ends of a pair of mandrel segments, having a body portion formed by a pair of opposed bevelled surfaces and wings formed by a pair of opposed recesses.
REFERENCES:
patent: 918926 (1909-04-01), Tanner
patent: 1907522 (1933-05-01), Eaton
patent: 2646995 (1953-07-01), Thompson
patent: 2699182 (1955-01-01), Baldridge, Jr.
patent: 2963129 (1960-12-01), Eberle
patent: 3432915 (1969-03-01), Doyle
patent: 3508766 (1970-04-01), Kessler et al.
patent: 3619548 (1971-11-01), Cavagnero
patent: 4142085 (1979-02-01), Knipstrom et al.
patent: 4201326 (1980-05-01), Connell
patent: 4213555 (1980-07-01), Minkiewicz et al.
patent: 4530527 (1985-07-01), Nolmberg
The Welding Encyclopedia, 11th Edition, Oct. 15, 1943, pp. 456-457.
Adonyi Yoni
Albritton Paul M.
Hann Jerry
McDermott John F.
Sanderson Miles G.
Nicholson Eric K.
USX Corporation
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