Pipe joints or couplings – Frangible element – Score line or groove
Patent
1993-07-16
1995-03-14
Arola, Dave W.
Pipe joints or couplings
Frangible element
Score line or groove
285179, F16L 3500
Patent
active
053971558
ABSTRACT:
An air duct fitting or pipe coupling used for connecting air conditioning or heating ducts. The fitting may be used as an integral unit to connect the ducts at a predetermined angular relationship from one another. The fitting may be severed into two sections, each section of which may be used to connect ducts at a different angular relationship from the integral unit. The fitting may be characterized as an elbow fitting. In the preferred embodiment, the fitting is a thin wall molded unit made of a non-metallic material. The first and second sections may be severed along a plane defined by a V-shaped groove molded in the fitting.
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Brochure of Northern Pipe Products, GPK Products, Inc., undated but admitted to be prior art.
Inda John P.
Inda Joseph J.
Arola Dave W.
General Plastics Inc.
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