Polyethylene pipe junction device

Details Polyethylene pipe junction device Polyethylene pipe junction device

1991-09-09

1993-05-18

Arola, Dave W.

Pipe joints or couplings

Nonmetal to metal

285259, F16L 3300

Patent

active

052114295

ABSTRACT:
A pipe junction device is disclosed for mounting on an exterior surface of a resilient pipe, such as polyethylene pipe. The pipe junction device includes a generally cylindrical sleeve member having an inner surface including at least one barb, preferably two, projecting inwardly and extending circumferentially around the inner surface. The inner diameter of the sleeve at the barbs is less than a diameter of the exterior surface of said pipe in the uncompressed state. The sleeve slidably receives the pipe wherein the resilient properties of the pipe expand the exterior surface of the pipe in the regions adjacent the region at the barbs to define diameters greater than the diameter of the pipe at the region at the barbs to restrict sliding movement of the sleeve member with respect to the pipe to securely mounting the sleeve to the pipe. An intermediate trough surface portion is disposed between two barbs having multiple levels.

REFERENCES:
patent: 2787480 (1957-04-01), Staller
patent: 2967067 (1961-01-01), Singer
patent: 3453006 (1969-07-01), Levake
patent: 3817561 (1974-06-01), Kay
patent: 3817562 (1974-06-01), Cook et al.
patent: 4220359 (1980-09-01), Evenson et al.
patent: 4275122 (1981-06-01), Fisher
patent: 4597594 (1986-07-01), Kacalieff et al.
patent: 4635972 (1987-01-01), Lyall
Four page document entitled "Competition", pp. 10-13, (Exhibit A).
Portions of a catalog labelled "Raccordi Sferici DALLAI Catalogo E listino prezzi", 4 pages including cover page, table of contents, p. 12, and back cover. Published in Italy in 1986 (Exhibit B). Drawing labelled Attachment 1 which shows various features of a coupling.

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