Techniques for resistance welding attachments to small...

Details Techniques for resistance welding attachments to small... Techniques for resistance welding attachments to small...

2001-02-28

2003-04-15

Elve, M. Alexandra (Department: 1725)

Electric heating

Metal heating

For bonding with pressure

C219S059100, C219S117100, C220S581000

Reexamination Certificate

active

06548780

ABSTRACT:

BACKGROUND OF THE INVENTION
The disclosed invention relates generally to pressure tanks, and more particularly to resistance welding of attachments to a metal pressure tank.
Small metal pressure tanks or vessels are utilized for a variety of purposes such as storing propane gas. These small metal pressure tanks commonly include attachments that are welded to the tank. Examples of such attachments include a handle or top collar, and a foot ring or base. These attachments are commonly attached to the tank by metal-inert-gas (MIG) welding.
Considerations with MIG welding include the need for filler material and an inert gas shield.
SUMMARY OF THE INVENTION
The disclosed invention is directed to welding an attachment to a tank section by causing welding current to flow through weld protrusions that are pressed against the tank section.


REFERENCES:
patent: 2118388 (1938-05-01), Zerbe
patent: 3050207 (1962-08-01), Oxenham
patent: 3522647 (1970-08-01), Holcomb et al.
patent: 4168795 (1979-09-01), Bennett
“Understanding the Fundamentals and Techniques Used in Resistance Welding”, Lawrence H. Alexander, AWS Convention, Chicago, IL, Apr. 26 & 27, 2000, 84 pages.

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