Pipe joints or couplings – With casing – lining or protector – Insulated
Patent
1979-05-21
1981-12-08
Arola, Dave W.
Pipe joints or couplings
With casing, lining or protector
Insulated
285286, 285319, 285331, 285424, 285DIG22, 285405, F16L 2500
Patent
active
043044239
ABSTRACT:
The device holds the ends of insulating mats against the inside walls of air ducts at the ends of the ducts where frame pieces form external glands on the ducts. The frame piece has a stay which rests on the outside of the air duct wall and a stay which rests on the inside of the air duct wall. The inner stay is bent back on itself and with multiple bends forms a longitudinally opening pocket which has a transverse-running catch strip with a v-shaped groove form at its free end, pointing towards the inner stay. A cross-connecting spot weld connects the outside stay, the duct wall, the inside stay and the bent back portion of the inner stay. A u-shaped, plastic holding strip, which is large enough in cross-section to hold the edge of the insulating mat, has a catch strip portion which is complementary to the catch strip portion of the pocket and can be flexibly inserted in the pocket so that the edge of the insulating mat can be inserted in the space between the outer wall of the u-shaped holding strip and the catch strip on the bent back portion of the inner stay.
REFERENCES:
patent: 2916054 (1954-12-01), Cullan
patent: 3675950 (1972-07-01), Beene
patent: 3712650 (1973-01-01), Mez
patent: 3836181 (1974-09-01), Kelver
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