Method of construction of a container with integral valve boss

Details Method of construction of a container with integral valve boss Method of construction of a container with integral valve boss

1977-02-02

1978-10-24

Keenan, Michael J.

113116W, B21D 5124

Patent

active

041215281

ABSTRACT:
A container for a pressurized gas cylinder provided with an integral non-protruding boss for a valve and method of making same. The container is made from substantially similar half shell portions each of which has a substantially straight cylindrical body wall portion and a dome-shaped end portion. Preferably the upper shell portion is flanged and inverted with respect to the bottom shell whereby the shells may be welded along a substantially horizontally extending weld line. Prior to be welded to the bottom shell, the upper shell is formed with an outwardly extending bulge which is reversely bent in order to form an integral, non-protruding boss. After being reversely bent, the bulge is reshaped to deepen the budge thereby diminishing its size. It is then pierced and internally threaded to receive a valve member.

REFERENCES:
patent: 1699361 (1929-01-01), Karmazin
patent: 2945294 (1960-07-01), Courtot et al.
patent: 3481175 (1969-12-01), White
patent: 3844355 (1974-10-01), Kreipe et al.

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