Method for the manufacture of a conical tubular member, and a me

Details Method for the manufacture of a conical tubular member, and a me Method for the manufacture of a conical tubular member, and a me

1985-10-03

1987-05-05

Friedman, Carl D.

Static structures (e.g., buildings)

Machine or implement

52738, E04C 330

Patent

active

046621431

ABSTRACT:
A conical tubular member has inwardly directed profilings (2, 2', 3, 3'), formed over a core with grooves arranged to receive the profilings (2, 2', 3, 3') and having a conical shape substantially corresponding to the internal shape of the member to be manufactured. Hydraulically and/or pneumatically applied force is divided over the surface of the tubular member by at least one flexible pressure applying member arranged surrounding the tubular member, and the member is thereafter formed into a conical shape corresponding to the shape of the core, the reduction in diameter of the member being compensated for by means of a change in the shape of the profilings (2, 2', 3, 3'). The member is advantageously manufactured from a material having through perforations, or a wire mesh material.

REFERENCES:
patent: 1215061 (1917-02-01), Rice et al.
patent: 1605828 (1926-11-01), Frahm
patent: 1664629 (1928-04-01), Kielberg
patent: 2568730 (1951-09-01), Guthmann
patent: 3487673 (1970-01-01), House
patent: 3570297 (1971-03-01), Matthews

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