Gas flow pre-charge for a plasma arc torch

Details Gas flow pre-charge for a plasma arc torch Gas flow pre-charge for a plasma arc torch

2005-11-01

2005-11-01

Paschall, Mark (Department: 3742)

Electric heating

Metal heating

By arc

C219S121550, C219S121540, C219S121590

Reexamination Certificate

active

06960737

ABSTRACT:
A system for controlling gas flow from a gas source, through a gas conduit, and to a plasma arc torch during a transition from a cold flow when no arc is present to a hot flow when an arc is provided by the present invention. The system comprises a first solenoid in communication with the gas source, a second solenoid disposed proximate the plasma arc torch, and a bypass circuit in communication with the gas source and the second solenoid. The bypass circuit comprises a bypass solenoid that controls the gas pressure within the gas conduit to reduce gas flow fluctuations when transitioning from cold flow to hot flow. Additional gas control systems and methods are also provided that cause the gas pressure to be higher during cold flow, prior to arc ignition, which overcomes the rapid drop in flow that typically occurs during the transition to hot flow.

REFERENCES:
patent: 5166494 (1992-11-01), Luo et al.
patent: 5695662 (1997-12-01), Couch et al.
patent: 5938948 (1999-08-01), Oros et al.
patent: 6326583 (2001-12-01), Hardwick et al.
patent: 6772040 (2004-08-01), Picard et al.

Affiliated with

Also associated with

Rating

Gas flow pre-charge for a plasma arc torch does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Gas flow pre-charge for a plasma arc torch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas flow pre-charge for a plasma arc torch will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3456606