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US 10,863,610 B2Granted
Plasma torch and components thereof
AssigneeLincoln Global, Inc.
InventorPraveen K. Namburu
Life of this patent
Estimating the term…
Abstract
Embodiments of the present invention include a plasma cutting torch and plasma cutting torch components, such as electrodes, cathodes, retainer caps, etc. having a unique physical features, including threads relationships. Embodiments include torch components having modified square thread with a specialized thread configuration including a particular relationship between thread crest and root, and included angles of thread sidewalls.
Claims14
A plasma cutting electrode for a plasma cutting torch, said plasma cutting electrode comprising:
- a distal end having an emissive insert inserted therein, where said distal end is insertable into a nozzle of the plasma cutting torch, said distal end having a first outer diameter;
- a shoulder portion upstream of said distal end, said shoulder portion having a second outer diameter which is larger than said first outer diameter;
- a central groove portion upstream of said shoulder portion wherein said central groove portion has a third outer diameter and has a first thread with a first crest having a first crest width at the third outer diameter and a second thread with a second crest having a second crest width at the third outer diameter which is in the range of 1.5 to 3 times larger than the first crest width, the first crest and the second crest alternate with respect to each other, and each of said first and second threads have a groove, respectively, where each of said grooves have angled sidewalls;
- and
- an upstream end portion, upstream of said central groove portion, and insertable into a cathode of the plasma cutting torch, where said upstream end portion has a fourth outer diameter.
2 more elements
A plasma cutting electrode for a plasma cutting torch, said plasma cutting electrode comprising:
- a distal end having an emissive insert inserted therein, where said distal end is insertable into a nozzle of the plasma cutting torch, said distal end having a first outer diameter;
- a shoulder portion upstream of said distal end, said shoulder portion having a second outer diameter which is larger than said first outer diameter, wherein said second outer diameter is in the range of 55 to 65% larger than said first outer diameter;
- and
- a central groove portion upstream of said shoulder portion wherein said central groove portion has a third outer diameter and has a first thread with a first crest having a first crest width at the third outer diameter and a second thread with a second crest having a second crest width at the third outer diameter which is in the range of 1.5 to 3 times larger than the first crest width, the first crest and the second crest alternate with respect to each other, and each of said first and second threads have a groove, respectively, where each of said grooves have angled sidewalls;
- and
- an upstream end portion, upstream of said central groove portion, and insertable into a cathode of the plasma cutting torch,
- wherein an included angle between the sidewalls of each respective groove is in the range of 20 to 40 degrees, and each of said grooves have a depth which is in the range of 4 to 10% of the third outer diameter, and
- wherein each of said first and second threads are in the range of 4 to 8 turns per inch.
5 more elements
Dependencies are inferred from the claim text.