Method of forming a large diameter extruded pipe

Details Method of forming a large diameter extruded pipe Method of forming a large diameter extruded pipe

2011-04-12

2011-04-12

Bryant, David P (Department: 3726)

Metal working

Method of mechanical manufacture

Gas and water specific plumbing component making

C138S109000, C285S416000

Reexamination Certificate

active

07921560

ABSTRACT:
A self-aligning flange includes a flange member, a collar member and a stop member. An inner perimeter of the collar member is sized to receive an outer perimeter of a pipe. The flange member extends outward from an outer perimeter of the collar member. The stop member extends inward from the inner perimeter of the collar member. A large diameter extruded pipe includes a continuous cross section of at least six inches in diameter. It is preferable to weld a flange to one end of the large diameter extruded pipe. Immediately after the large diameter extruded pipe has been formed in an extrusion press, it is sprayed with a coolant to increase the surface hardness thereof.

REFERENCES:
patent: 1554881 (1925-09-01), Reimann
patent: 2208821 (1940-07-01), Taylor
patent: 3369555 (1968-02-01), Heflin, Jr.
patent: 4659396 (1987-04-01), Lifka et al.
patent: 4832383 (1989-05-01), Roussel
patent: 5447583 (1995-09-01), Arthur et al.
patent: 6568711 (2003-05-01), McKay
patent: 2004/0250925 (2004-12-01), Van Der Winden

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