Patent ID: 9572243
Date: 2017-02-14
CPC Classifications: H05H

Claim:
1. A swirl ring for an air cooled plasma cutting torch, said ring comprising: an upstream portion having an outer surface and an inner cavity, and a downstream portion having an outer surface and an inner cavity, wherein said outer surface of said upstream portion has an outer diameter which is larger than an outer diameter of said outer surface of said downstream portion; wherein said upstream portion has a plurality of channels formed in said outer surface of said upstream portion which extend along a length of said upstream portion; and wherein said downstream portion has a plurality of holes which extend from said outer surface of said downstream portion to said inner cavity of said downstream portion, where said plurality of holes are comprised of a first type of said holes, each of said first type of holes having a first centerline which extends through a centerline of said swirl ring such that the first centerline of said first types of holes are normal to the centerline of the swirl ring, and a second type of holes, each of said second type of holes having a second centerline which is angled relative to said centerline of said swirl ring.