Composite pipe

Details Composite pipe Composite pipe

2011-08-02

2011-08-02

Hong, John C (Department: 3726)

Metal working

Method of mechanical manufacture

Assembling or joining

C029S525000

Reexamination Certificate

active

07987576

ABSTRACT:
A sleeved composite pipe or piling structure formed of an elongated polyethylene pipe or tube of high-density polyethylene (HDPE) or another polyethylene material installed over a substantially rigid and incompressible hollow metal pipe or solid wood core having an outer diameter that is the same or slightly larger than a normal inside diameter of the polyethylene pipe or tube when measured in a relaxed state at ambient temperature. The polyethylene pipe or tube is, for example, a HDPE 3408 material formed of virgin PE 3408 resin as specified in ASTM D3350 with UV protection, and the pipe is produced to ASTM A-3408. The metal pipe core can be ferrous or nonferrous pipe.

REFERENCES:
patent: 2005/0036833 (2005-02-01), Hotchkin
patent: 2005/0143240 (2005-06-01), Tan et al.
patent: 1147133 (1983-05-01), None

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