Patent · US Expired

Epoxy-concrete coated pipe

US4361336A · kind A · utility

15Cited by

3References

4Claims

0Family size

Assignee

Buderus Aktiengesellschaft · DE

Inventors

Kurt Reeh · Wettenberg, DE
Hans-Christoph Jerofke · Wetzlar, DE
Friedrich Kramer · Wetzlar, DE

Key dates

Filing date	Oct 3, 1980
Grant date	Nov 30, 1982
Priority date	—
Expiry date	Oct 3, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S138/06
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A cast-iron or steel pipe is coated with a two-component epoxy resin and then, prior to curing of the resin, is coated with a relatively thick layer of hydraulic concrete. A layer of a water-impervious bitumen is then applied over the concrete. The concrete layer does not extend over the spigot in a bell-and-spigot pipe, and a special fitting is provided for such a piece of pipe when the spigot end must be cut off.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.