Pipe unions

Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging

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Details

72356, 72370, B21K 116

Patent

active

043620434

ABSTRACT:
According to the present invention, a new cold working metal process is disclosed for the formation of metal pipe union components, which includes blanks for so called gas meter swivels, which are actually pipe unions components with a slight adaptation. Both male and female components are made by the process. The process cold works a metal elongated hollow open ended blank to deform an unsupported circumferential portion of the blank wall into a predetermined shape. The steps of the process comprise supporting portions of the blank wall exterior and interior in a manner to define a shaping section of the predetermined shape in the area of the unsupported wall portion; applying a compressive load on the blank ends of sufficient force to exceed the compressive yield strength of the metal blank thereby deforming the unsupported wall portions to cause the deforming metal to flow into the shaping section to provide the predetermined shape. Pipe connectors produced by this process are inexpensive, less subject to material defects and, therefore, more reliable in the field.

REFERENCES:
patent: 1151753 (1915-08-01), Bates
patent: 1338462 (1920-04-01), Rydbeck
patent: 1354779 (1920-10-01), Rydbeck
patent: 1817854 (1931-08-01), Sorensen
patent: 2027406 (1936-01-01), Spatta
patent: 2646996 (1953-07-01), Parmesan
patent: 3648509 (1972-03-01), McDowell
patent: 3752509 (1973-08-01), Stafford
patent: 4122701 (1978-10-01), Lehnhart

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