Electric heating – Metal heating – By arc
Patent
1986-05-06
1987-03-10
Paschall, M. H.
Electric heating
Metal heating
By arc
219121PM, 219121PQ, 219 75, 31323151, B23K 900
Patent
active
046492577
ABSTRACT:
A gas distribution ring for a plasma gun comprises a ring member with two sets of gas inlet orifices extending from the outer surface inwardly through the ring member. The outer surface has an undulated groove for an O-ring formed therein, and the orifices are positioned with respect to the undulated O-ring such that one set of orifices are isolated on one side of the O-ring and the other set of orifices are isolated on the other side of the O-ring. In a preferred embodiment the orifices of one set are radial with respect to the axis of the ring, and the orifices on the other side of the undulated O-ring have a tangential component to provide vortical gas flow in the arc region of the gun. The gas distribution ring positioned in the plasma spray gun permits a simple choice between radial and vortical flow in the arc region of the gun, without alteration of the gun.
REFERENCES:
patent: 2941063 (1960-06-01), Ducati et al.
patent: 3145287 (1964-08-01), Siebein et al.
patent: 3286997 (1966-11-01), Ledbetter
patent: 3313908 (1967-04-01), Unger et al.
patent: 3823302 (1974-07-01), Muehlberger
patent: 3851140 (1974-11-01), Coucher
patent: 3869593 (1975-03-01), New et al.
Rotolico Anthony J.
Yakovlevitch Daniel
Grimes E. T.
Ingham H. S.
Masselle F. L.
Paschall M. H.
The Perkin-Elmer Corporation
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