Pipe joints or couplings – Elbow – Sheet metal
Patent
1975-05-12
1976-10-26
Callaghan, Thomas F.
Pipe joints or couplings
Elbow
Sheet metal
29509, 285189, 285424, F16L 4100, F16L 4300
Patent
active
039880303
ABSTRACT:
This invention relates to a slip-joint coupling between a sheet metal duct fitting and the metal frame bordering a rectangular opening in a so-called "duct board" consisting of a fiberglass mat overlayed with a sheet of silvered paper backing adhesively attached to one face of the latter, such coupling comprising outturned flanges along both side margins and the leading edge of the fitting plus an inturned flange on the trailing edge of the latter, all of which cooperate with a three-sided frame having outwardly opening channels on each side and across one end to receive the duct board together with relatively narrower inwardly opening channels on one face for slidably receiving the outturned flanges of the fitting. With the fitting and frame in assembled relation, the inturned flange is bent down to complete the fourth side of the frame, lock the assembly within the duct opening and complete the air seal along the fourth side of the latter.
REFERENCES:
patent: 2874980 (1959-02-01), Browning
patent: 2880017 (1959-03-01), Anderson et al.
patent: 2950131 (1960-08-01), Hennen
patent: 2965397 (1960-12-01), Vanden Berg
patent: 3185506 (1965-05-01), Szlashta
Callaghan Thomas F.
Spangler, Jr. Edwin L.
LandOfFree
Slip-joint coupling, method of installing same and frame subasse does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Slip-joint coupling, method of installing same and frame subasse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slip-joint coupling, method of installing same and frame subasse will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-181445