Electric heating – Metal heating – Cutting or disintegrating
Patent
1994-07-07
1996-05-07
Evans, Geoffrey S.
Electric heating
Metal heating
Cutting or disintegrating
295921, B23H 104
Patent
active
055148450
ABSTRACT:
An electrode tube for electrical discharge machining includes an outer peripheral portion and a plurality of rails or ribs projecting inwardly from an outer peripheral portion toward the central axis of the tube. The rails or ribs are formed integrally with the outer peripheral portion by drawing, or cold rolling, or hot extrusion. The space inside the tube is substantially divided into a plurality of through holes along the central axis by the plurality of rails or ribs.
REFERENCES:
patent: 2715172 (1955-08-01), Larkins, Jr.
patent: 3622734 (1971-11-01), Mainwaring
patent: 4855557 (1989-08-01), Denny
Ezaki Shigeo
Harada Kazutoshi
Isejima Tsuyoshi
Evans Geoffrey S.
Fasse W. F.
Fasse W. G.
Sumitomo Electric Industries Ltd.
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