Pipe joints or couplings – Nonmetal to metal – Internal member
Patent
1981-12-28
1984-01-31
Scanlan, Jr., Richard J.
Pipe joints or couplings
Nonmetal to metal
Internal member
285174, 285423, 138109, 175236, F16L 4700, F16L 5500, F16L 2500
Patent
active
044286023
ABSTRACT:
An inner tube element for a coring apparatus comprising a double tube, made of synthetic resin reinforced with fibers and provided at its ends with connecting nipples, is entirely made of synthetic resin and overlaps, at each of its ends, a part of the nipples having a rough surface gripped by said fibers, preferably in the form of webs of glass fibers.
The inner tube element is manufactured by a process in which two nipples or couplings are placed onto a cylindrical mandrel having a constant section and rotating about its longitudinal axis, at a predetermined distance corresponding to the tube element to be manufactured, a part of said nipples having an inner diameter substantially identical to the diameter of the mandrel and having a rough surface, and fibers coated with a synthetic resin are wound helically onto said cylindrical mandrel, so as to overlap the rough part of said nipples.
REFERENCES:
patent: 3092192 (1963-06-01), Deely
patent: 3572392 (1971-03-01), McLarty
patent: 3768842 (1973-10-01), Ahlstone
patent: 3874465 (1975-04-01), Young et al.
patent: 4279275 (1981-07-01), Stanwool et al.
Fliervoet Maria J. H.
Kramer Pieter
Lambot Honore J.
Scanlan, Jr. Richard J.
Societe Anonyme Diamant Boart
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