Pipe joints or couplings – End to side or plate
Patent
1977-10-31
1978-10-31
Callaghan, Thomas F.
Pipe joints or couplings
End to side or plate
285319, 285424, F16L 4100
Patent
active
041230930
ABSTRACT:
A fitting for connecting conduits to ductboard and other walls, including a short length of pipe having a seating bead and attached spring clips for securing the fitting to a bore in a ductboard, with the spring clips holding the ductboard against the bead.
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patent: 3406988 (1968-10-01), Jones
patent: 3596936 (1971-08-01), Dieckmann
patent: 3871688 (1975-03-01), Molino
patent: 3954289 (1976-05-01), Martin, Sr.
patent: 4032178 (1977-06-01), Neuroth
Callaghan Thomas F.
Hercules Supply Company
Law Richard D.
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