Plasma scalpel

Details Plasma scalpel Plasma scalpel

1988-02-18

1989-06-13

Paschall, M. H.

Electric heating

Metal heating

By arc

21912152, 21912157, 21912139, B23K 900

Patent

active

048394920

ABSTRACT:
In a device of the plasma scalpel type (40, 41) including at least two spaced-apart electrodes (21, 22) subjected to electrical potential differences such that electric arcs take place therebetween, together with structures for producing at least one fluid flow passing through a region of space where said electric arcs occur, the potential differences being alternating potential differences at medium or high frequency, the ends of said electrodes are substantially filiform and forming an angle therebetween which is preferably acute, and a voltage step-up transformer is incorporated therein in order to deliver the alternating potential differences, with the fluid flows arriving from within the angle or along at least one of said electrodes. In one embodiment, each of the electrodes is constituted by a wire of electrically conductive material (21, 22) and is placed inside an electrode-carrier duct (27, 28) whose inside diameter is slightly greater than the diameter of the electrode, with the end of the electrode projecting beyond the duct and with the fluids being conveyed along said electrode-carriers. The device is versatile. It has numerous applications, in particular in dental surgery, but also for operations of etching, cutting out, welding, or recharging with material, treatments to composite materials, etc.

REFERENCES:
patent: 2923811 (1960-02-01), Feldmeyer et al.
patent: 3312566 (1967-04-01), Winzeler et al.
patent: 3358114 (1967-12-01), Inoue
patent: 3604889 (1971-09-01), Rohrberg
patent: 4136273 (1979-01-01), Fujita et al.
patent: 4147957 (1979-04-01), Hildebrand
patent: 4275287 (1981-06-01), Hiratake
patent: 4495399 (1985-01-01), Cann

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