Branch tool

Details Branch tool Branch tool

1976-06-09

1977-08-23

Lanham, C.W.

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

B21D 4102

Patent

active

040431711

ABSTRACT:
A method of forming a socket on a tube where a branch tube is to be joined to it, which consists of the steps of forming an aperture in the side of the tube which aperture is smaller than the internal dimension of the socket required, inserting expandible jaws into the aperture, placing a sliding former into contact with the tube around the jaws, and expanding the jaws while causing relative outward axial movement of the former in relation to the jaws.

REFERENCES:
patent: 333410 (1885-12-01), Hawkins
patent: 1372197 (1921-03-01), Rudolph
patent: 2155542 (1939-04-01), Graham
patent: 2507859 (1950-05-01), Keller
patent: 2999529 (1961-09-01), Rast

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