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:
Apr. 19, 2005
Filed:
May. 22, 2003
Kevin D. Horner-richardson, Cornish, NH (US);
Pearl A. Grant, Grantham, NH (US);
Roger W. Hewett, Plainfield, NH (US);
Gene V. Hewes, Plainfield, NH (US);
Howard H. Horn, Wilmot, NH (US);
Kevin D. Horner-Richardson, Cornish, NH (US);
Pearl A. Grant, Grantham, NH (US);
Roger W. Hewett, Plainfield, NH (US);
Gene V. Hewes, Plainfield, NH (US);
Howard H. Horn, Wilmot, NH (US);
Thermal Dynamics Corporation, West Lebanon, NH (US);
Abstract
A plasma arc torch has a threadless electrode-cathode locking assembly, a one-piece tip assembly, and a rotational contact starting mechanism. The cathode and electrode of the locking assembly are configured such that relative rotation of the electrode with respect to the cathode causes the electrode to move in an axial direction relative to the cathode for locking the electrode in fixed axial and rotational position with respect to the cathode. The inner wall of the one-piece tip assembly is configured to receive the forward end of the electrode in a non-contact position. Rotation of the electrode with respect to the tip causes an arcing formation on the electrode to contact an arcing chamber within the cavity. Rotation of the electrode away from the tip generatesa pilot arc in the arcing chamber.