The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2005
Filed:
Feb. 26, 2002
Joseph P. Jones, Lebanon, NH (US);
Kevin D. Horner-richardson, Cornish, NH (US);
Shiyu Chen, Claremont, NH (US);
Roger W. Hewett, Plainfield, NH (US);
Joseph P. Jones, Lebanon, NH (US);
Kevin D. Horner-Richardson, Cornish, NH (US);
Shiyu Chen, Claremont, NH (US);
Roger W. Hewett, Plainfield, NH (US);
Thermal Dynamics Corporation, West Lebanon, NH (US);
Abstract
A contact start plasma arc torch is provided that comprises an electrode, a tip, and an initiator that is resiliently biased into contact with the tip, the initiator being movable against the resilient bias to separate from the tip and establish a pilot arc between the initiator and the tip. The initiator is disposed within a start cartridge, which preferably comprises a coil spring that biases the initiator into contact with the tip. The plasma arc torch further comprises a plurality of head vent holes to vent gas from within the start cartridge during operation of the torch. Additionally, the tip defines a plurality of swirl holes and secondary gas holes to generate and control a plasma stream that is subsequently blown from a central exit orifice in the tip.