Metal fusion bonding – Process – Using dynamic frictional energy
Reexamination Certificate
2007-06-26
2007-06-26
Johnson, Jonathan (Department: 1725)
Metal fusion bonding
Process
Using dynamic frictional energy
Reexamination Certificate
active
10970907
ABSTRACT:
A method of friction stir welding and a non-consumable retractable shoulderless variable penetration friction stir welding tool. The tool includes a substantially cylindrical body portion, a head portion, and a tip section, each integral to the tool. The body portion has a longitudinal axis about which it is rotable, a diameter, a sidewall substantially parallel to the longitudinal axis, a proximal end, and a distal end. The head portion is located at the distal end of the body portion. The head portion has a base with a diameter substantially equal to the diameter of the body portion thereby forming a smooth transition between the body portion and the head portion, thus, the tool has no shoulder. The head portion includes a face that converges to the tip section. The tool is retractable, reduces overheating, improves weld quality by reducing internal voids and lack of fusion, and facilitates variable penetration welds.
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Bernath Jeffrey J.
Fisher, Jr. James J.
Trapp Timothy J.
Dawsey David J.
Edison Welding Institute, Inc.
Gallagher Michael J.
Gallagher & Dawsey Co. LPA
Johnson Jonathan
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