Pipe joints or couplings – With casing – lining or protector – Lined
Patent
1982-02-12
1984-12-18
Scanlan, Jr., Richard J.
Pipe joints or couplings
With casing, lining or protector
Lined
285156, 285381, 285419, 285373, 138149, 138151, F16L 5916, F16L 4100, F16L 2500, F16L 2100
Patent
active
044887396
ABSTRACT:
An insulating pipe part of thermoplastic material comprises two opposite sections and one third section disposed at an angle with respect to the former sections, the wall portion of said sections being provided with a continuous wall cutting slit. The pipe part may comprise thicker parts of a polyurethan foam.
For forming an insulated branch pipe joint, said insulating pipe part is pushed over a branch pipe and subsequently plastic sleeves with beveled front ends are heatshrunk on to said sections, thereby closing said slit in a moisture tight manner.
In order to obtain a reliable moisture tight closing, the sleeves are provided with beveled front ends so that the lower sleeve ends overlap each other.
REFERENCES:
patent: 3191632 (1965-06-01), Keiding
patent: 3192377 (1965-06-01), Abolins
patent: 3453716 (1969-07-01), Cook
patent: 3575214 (1971-04-01), Bindel
patent: 3744823 (1973-07-01), Muir et al.
patent: 4259981 (1981-04-01), Busse
Scanlan, Jr. Richard J.
Wavin B.V.
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