Patent · US Active

Electrode for a contact start plasma arc torch and contact start plasma arc torch employing such electrodes

US8541712B2 · kind B2 · utility

19Cited by

17References

35Claims

0Family size

Assignee

Hypertherm, Inc. · US

Inventors

Jonathan Mather · Grafton, US
Stephen T. Eickhoff · Hanover, US
Jesse A. Roberts · Colchester, US

Key dates

Filing date	Dec 20, 2011
Grant date	Sep 24, 2013
Priority date	—
Expiry date	Dec 20, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH05H1/3489
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An electrode for a contact start plasma arc torch includes an elongated electrode body formed of an electrically conductive material. The electrode body is movable relative to the torch. The electrode and torch can include a contact element having a first surface in electrical communication with the power contact and a second surface characterized by (i) physical contact with the electrode body during transferred arc mode and (ii) absence of physical contact with the electrode body during initiation of a pilot arc.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.