Connection for foam insulated pipes

Details Connection for foam insulated pipes Connection for foam insulated pipes

1972-01-07

1977-04-26

Callaghan, Thomas F.

Pipe joints or couplings

With casing, lining or protector

Insulated

285286, 285381, F16L 5914

Patent

active

040197611

ABSTRACT:
A pipe having an annular ring of a foam plastic material on its outer surface and a covering layer of thermoplastic material on the outer surface of the foam plastic ring. An opening between two free ends of foam plastic layer ring lying opposite each other of adjoining pipes is closed by a connecting layer which cooperates sealingly with the covering layers. A ring of rigid material is positioned under the covering layer at the point where the connecting layer is clamped onto the covering layer.

REFERENCES:
patent: 2416618 (1947-02-01), Ferla
patent: 2761949 (1956-09-01), Colton
patent: 2894538 (1959-07-01), Wilson
patent: 2964064 (1960-12-01), Jones
patent: 3146005 (1964-08-01), Peyton
patent: 3369826 (1968-02-01), Boosey et al.
patent: 3453716 (1969-07-01), Cook
patent: 3502356 (1970-03-01), Schmunk
patent: 3544672 (1970-12-01), Goda et al.
patent: 3711124 (1973-01-01), Gerholt et al.

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