Core for a pipe that is to be bent

Details Core for a pipe that is to be bent Core for a pipe that is to be bent

1981-01-02

1983-04-05

Larson, Lowell A.

Metal deforming

Tool and/or tool holder

Including flexible or yieldable tool or support

72478, B21D 903

Patent

active

043786898

ABSTRACT:
The pipe-bending core consists of elements which are coupled to one another in articulated manner and threaded like a string of pearls on a wire cable, and which are expanded on being pushed against one another, but nevertheless remain articulated. The principle can be applied to pipes of differing cross-section. After releasing the bracing arrangment, the elements contract again by means of spring bias, so that the core can easily be withdrawn from the bent pipe.

REFERENCES:
patent: 693186 (1902-02-01), Sweet
patent: 1654697 (1928-01-01), Mueller et al.
patent: 1856597 (1932-05-01), Stjarnstrom
patent: 2044322 (1936-06-01), Oliver et al.
patent: 2057359 (1936-10-01), Baker
patent: 4059036 (1977-11-01), Hartley
patent: 4086803 (1978-05-01), Wheeler

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