Vented shield system for a plasma arc torch

Details Vented shield system for a plasma arc torch Vented shield system for a plasma arc torch

2005-07-05

2005-07-05

Paschall, Mark (Department: 3742)

Electric heating

Metal heating

By arc

C219S075000, C219S121510, C219S121480

Reexamination Certificate

active

06914211

ABSTRACT:
Vented shield systems for plasma arc torches are provided that comprise a shield cup body defining a distal end portion, a vented retainer secured to the distal end portion of the shield cup body, and a shield cap secured to the vented retainer. The vented retainer defines at least one vent passageway that directs a flow of secondary gas inward toward the shield cap, and the vented shield system blocks at least a portion of molten metal from contacting components, such as a tip or nozzle, of the plasma arc torch. The shield cap may comprise a mechanized cap, a drag cap, a gouging cap, or a deflector cap, among others. Accordingly, various shield caps may be employed without removal or replacement of the vented retainer. The same vented retainer may be used throughout a variety of plasma arc torch applications.

REFERENCES:
patent: 3469069 (1969-09-01), Allen
patent: 4861962 (1989-08-01), Sanders et al.
patent: 5120930 (1992-06-01), Sanders et al.
patent: 5132512 (1992-07-01), Sanders et al.
patent: 5856647 (1999-01-01), Luo
patent: 6069339 (2000-05-01), McGrath et al.
patent: 6084199 (2000-07-01), Lindsay et al.
patent: 6268583 (2001-07-01), Yamaguchi et al.

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