US Patent No. 10,716,200

PLASMA ARC CUTTING SYSTEM, INCLUDING RETAINING CAPS, AND OTHER CONSUMABLES, AND RELATED OPERATIONAL METHODS


Patent No. 10,716,200
Issue Date July 14, 2020
Title Plasma Arc Cutting System, Including Retaining Caps, And Other Consumables, And Related Operational Methods
Inventorship John Peters, Canaan, NH (US)
Brian J. Currier, Newport, NH (US)
Assignee Hypertherm, Inc., Hanover, NH (US)

Claim of US Patent No. 10,716,200

1. A liquid cooled shield assembly for a plasma arc torch, the liquid cooled shield assembly comprising:an inner cap including:
a substantially hollow body having a proximal end and a distal end that define a longitudinal axis, the distal end including an annular portion about the longitudinal axis; and
a liquid passage defined, at least in part, by an interior surface of the body, the liquid passage including a first set of ports in the annular portion including three or more discreet, circumferentially disposed radial liquid exit ports, the first set of ports extending between an interior portion of the body and an exterior portion of the body to convey a cooling liquid out of the liquid exit ports in a radial direction with respect to the longitudinal axis;
and
a shield at least partially surrounding the inner cap and having a liquid impingement region on an interior surface of the shield adjacent to the first set of liquid exit ports, the liquid impingement region for (i) receiving the cooling liquid from the first set of liquid exit ports, and (ii) forming part of a liquid exit channel in the plasma arc torch.