Pipe joints or couplings – End to side or plate
Patent
1974-12-04
1976-12-21
Arola, Dave W.
Pipe joints or couplings
End to side or plate
285321, 285424, F16L 500
Patent
active
039984800
ABSTRACT:
This invention relates to metal or plastic pipe fittings for use in low pressure non-metallic duct work and, more specifically, to branch take-off fittings characterized by a tubular sleeve terminating adjacent one end in a circumferential stop-forming obstruction of some sort effective to prevent a continuous ring from sliding off the end when abutted thereagainst, a ring sized to engage the stop-forming obstruction while cooperating therewith to form a substantially air tight seal around the opening in the duct wall through which the sleeve passes, an annular groove encircling the sleeve spaced toward the opposite plain end thereof a distance equal to the thickness of the duct wall, and a split lock ring springable to the degree necessary for insertion into the annular groove, the lock ring and continuous ring cooperating with one another in assembled relation to maintain the sleeve detachably connected into the duct wall. The invention also encompasses the novel method of installing the fitting which comprises the steps of cutting a hole in the duct wall of a size sufficient to pass the stop-forming obstruction on the sleeve, passing the sleeve completely through said opening into the interior of the duct, slipping the continuous ring over the plain end of the sleeve before drawing said end back out through the opening until the continuous ring rests against the inside of the duct wall bordering same in substantially air tight sealed engagement therearound, and springing the split ring preparatory to releasably locking it into the annular groove.
REFERENCES:
patent: 887270 (1908-05-01), Richardson
patent: 1291578 (1919-01-01), Mcphail
patent: 1659094 (1928-02-01), Godfrey
patent: 3761116 (1973-09-01), Scheitlin
Arola Dave W.
Spangler, Jr. Edwin L.
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