Tubing

Details Tubing Tubing

1986-04-23

1987-05-19

Arola, Dave W.

Pipe joints or couplings

With leakage or drip disposal

Weep holes

2853822, F16L 5500

Patent

active

046661867

ABSTRACT:
An enhanced surface tube is made from two conduits with the inner conduit having a spiral groove extending inwardly from the outer surface so that the two conduits are connected by the spiral groove. The inner conduit is further provided with a longitudinal groove therein. The construction of the tube is such as to provide a breakdown venting path for fluids between the conduit walls.

REFERENCES:
patent: 3129960 (1964-04-01), Schrodt
patent: 3856333 (1974-12-01), Cox
patent: 4403385 (1983-09-01), Kirk

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