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:
May. 05, 1987
Filed:
Nov. 04, 1985
Robert D Kneeland, Enfield, NH (US);
Bruce O Hatch, Lebanon, NH (US);
Richard A Spaulding, Hanover, NH (US);
Thermal Dynamics Corporation, West Lebanon, NH (US);
Abstract
A plasma-art torch interlock with flow sensing is provided. A flow rate sensor is included within the conduit supplying working fluid to a plasma-arc torch. By sensing an increase in flow rate of the working fluid which is caused by a necessary part being not in place, a control circuit shuts off power to the torch. Pressure in the conduit may also be sensed and the power to the torch shut down if a minimum pressure needed for torch operation is not achieved. In a second embodiment, two conduits are provided to supply fluid to the torch. One conduit supplies the primary working fluid to create the plasma-arc while the other supplies secondary flow for purposes of cooling.