Reinforcement butt stud welding method and device therefor...

Electric heating – Metal heating – For bonding with pressure

Reexamination Certificate

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C219S098000, C219S056000

Reexamination Certificate

active

06906277

ABSTRACT:
A reinforcement butt stud welding method and a device therefore, capable of butt-welding a stud reinforcing bar coaxially to the end portion of a horizontally-laid existing reinforcement in a small work space; and a repairing/expanding method for a ferroconcrete structure. The reinforcement butt stud welding method includes the steps of fitting an earth clamp over the periphery of the end portion of the existing reinforcement, fitting an annular stud base that is a heat-resisting, insulating material to the conductor surface of the earth clamp by being pressed against the conductor surface, bringing the tip end of a stud reinforcing bar, loaded in a stud welding gun, into contact with the end face of the existing reinforcement, and keeping a ferrule disposed around the tip end portion of the stud reinforcing bar joined to the stud base to complete stud welding.

REFERENCES:
patent: 2718579 (1955-09-01), Kennedy
patent: 5130510 (1992-07-01), Zeigler et al.
patent: 5824987 (1998-10-01), Volk
patent: 6163005 (2000-12-01), Easterday
patent: 34-1259 (1959-03-01), None
patent: 36-25536 (1961-09-01), None
patent: 58-6780 (1983-01-01), None
patent: 3-221613 (1991-09-01), None
patent: 6-269945 (1994-09-01), None

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