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US 4,304,423 AGranted
Apparatus for air conducting duct
OwnerGeorge Mezinventor
Life of this patent
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OwnerGeorge Mezinventor
Estimating the term…
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.
In a device for holding the edge of inner insulating mats which extend transversely to the longitudinal direction of an air-conducting duct in the area of a metal frame piece which forms a prefabricated gland, in which the frame piece has a stay which runs inside the wall of the air-conducting duct and lies against the latter, a stay which rests on the outside of the duct wall and a connection means which, in the assembled state, connects the stay of the frame piece resting on the outside of the duct wall, the duct wall and the inner stay of the frame piece firmly together;
A metal frame piece for use in holding the edge of inner insulating mats which extend transversely to the longitudinal direction of an air-conducting duct, and which forms a prefabricated gland for the air-conducting duct, in which the frame piece has a stay which runs inside the wall of the air-conducting duct and lies against the latter, a stay which rests on the outside of the duct wall and a connection means which, in the assembled state, connects the stay of the frame piece resting on the outside of the duct wall, the duct wall and the inner stay of the frame piece, firmly together;
A holding strip for use in holding the edge of inner insulating mats which extend transversely to the longitudinal direction of an air-conducting duct in the area of a metal frame piece which forms a prefabricated gland, in which the frame piece has a pocket formed in part by a bent back stay portion which is open in the longitudinal direction of the air-conducting duct toward the duct opening and a catch strip on said bent back stay portion which runs transversely along the pocket and points toward a wall of the duct;
Dependencies are inferred from the claim text.