Pipe joints or couplings – Elbow
Patent
1998-07-08
2000-12-26
Nicholson, Eric K.
Pipe joints or couplings
Elbow
285354, 28513311, F16L 4300
Patent
active
061647063
ABSTRACT:
A molded sweep elbow tube connector includes a molded tube connector member comprising a first linear tube end portion, a second linear tube end portion, and a curved sweep tube portion defined by a relatively large sweep radius and joining the two end portions to form an integral one-piece molded part. The tube connector member forms an interior passageway for carrying a flow of fluid, characterized by a sweep bend between the two end portions, permitting fluid laminar flow through the tube connector. The tube connector member has a thick wall thickness over at least a portion of the curved sweep tube portion and a thin wall thickness over the first linear tube end. The thin wall thickness facilitates the removal of a curved core pin from the part through a linear tube end portion after injection molding, since the plastic material will flex enough to permit the pin to be stripped without damaging the part. The tube connector has a first connector structure at the first tube end portion, and a second connector structure at the second tube end portion. Exemplary connector structures include male and female flare connectors, and male pipe thread connectors.
REFERENCES:
patent: 1450606 (1923-04-01), Paine
patent: 2785910 (1957-03-01), Munger
patent: 3540223 (1970-11-01), Ebbe
patent: 4796926 (1989-01-01), Rapsilver
patent: 5882042 (1999-03-01), Lacoste
Data Sheet (1 page), Fluoroware, Inc., Aug. 1994, p. 2.21, re Flaretech PFA Union Reducer Tee, "Spacesaver" Branch Tee and "Spacesaver" Union Tee.
Nicholson Eric K.
Roberts Larry K.
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