Method to manufacture sealing nipples or plugs

Details Method to manufacture sealing nipples or plugs Method to manufacture sealing nipples or plugs

1991-02-20

1993-01-19

Larson, Lowell A.

Metal deforming

With cutting

By shearing tool-couple

72348, B21D 5324

Patent

active

051798530

ABSTRACT:
The method to manufacture sealing nipples or plugs comprises a cutting process of a disk-shaped element from a metal sheet followed by drawing of the disk to obtain a hollow element of cylindrical shape, closed at one end by a cap, and then pressing the hollow element to form an annular crown on the outer peripheral surface of it.
Lastly the threading of at least a portion of the outer peripheral surface starting from the open end, is carried out.

REFERENCES:
patent: 406479 (1889-07-01), Schrader et al.
patent: 808177 (1905-12-01), Thiem
patent: 1125229 (1915-01-01), Webster
patent: 1142302 (1915-06-01), Carlson
patent: 1803022 (1931-04-01), Kowal
patent: 1876304 (1932-09-01), Kramer
patent: 2770260 (1956-11-01), Henderson
patent: 3000424 (1961-09-01), Weise
patent: 3688717 (1972-09-01), Rudolph et al.

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