Plasma arc collimator design and construction

Details Plasma arc collimator design and construction Plasma arc collimator design and construction

2007-11-20

2007-11-20

Paschall, Mark (Department: 3742)

Electric heating

Metal heating

By arc

C219S121480, C219S075000, C219S121520, C313S231310

Reexamination Certificate

active

11732430

ABSTRACT:
An improved collimator for a plasma arc torch consists of an annular holder member and an insert member. The insert member includes a tubular stem portion ending in an integrally formed, radially extending face plate. When the stem portion is fitted into the central bore of the holder member with a predetermined clearance fit therebetween, a cooling water passage is created. The improved collimator is characterized by the absence of any welds between the holder member and the insert member that would be exposed to conductive gases given off during use of the plasma arc torch and a lesser resistance to cooling water flow than prior art collimator designs.

REFERENCES:
patent: 3194174 (1965-07-01), Coberly et al.
patent: 3818174 (1974-06-01), Camacho
patent: 4559439 (1985-12-01), Camacho et al.
patent: 5362939 (1994-11-01), Hanus et al.

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