# US 11,310,901 B2 · Plasma torch and components thereof

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- Number: US 11,310,901 B2
- Document ID: US11310901B2
- Status: Granted
- Kind: B2
- Application number: 16/383,854
- Filed: 2019-04-15
- Published: 2019-08-08
- Granted: 2022-04-19
- Earliest claimed: 2015-08-28
- Assignees: Lincoln Global, Inc.
- Applicants: Lincoln Global, Inc.
- Inventors: Praveen K. Namburu
- Web page: https://patentgrep.com/patent/US11310901B2

## CPC

- H05H 1/34: Details, e.g. electrodes, nozzles
- B23K 10/00: Welding or cutting by means of a plasma
- B23K 35/0205: {Non-consumable electrodes; C-electrodes}
- B23K 35/0211: {for use in cutting (B23K35/0205 takes precedence)}
- B23K 35/0216: {Rods, electrodes or wires}
- H05H 1/3436: {Hollow cathodes with internal coolant flow}
- H05H 1/3442: {Cathodes with inserted tip}
- H05H 1/3447: {Rod-like cathodes}
- H05H 1/3468: {Vortex generators}
- H05H 1/3478: {Geometrical details}
- H05H 1/3489: {Means for contact starting}
- H05H: PLASMA TECHNIQUE (apparatus or processes specially adapted for producing X-rays H05G2/00); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM

## 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.

## Claims

### Claim 1

A component for a plasma cutting torch, said component comprising:
a body portion; and
a thread portion positioned on an outer surface of said body portion, where said thread portion comprises a male thread which has a crest with a crest width and a root with a root width, wherein a ratio between said crest width and said root width is in the range of 1.2 to 1.6, and where said male thread has angled sidewalls between said root and said crest, where said angled sidewalls have an included angle of 10 degrees,
wherein said male thread has 12 turns per inch.

### Claim 2 (depends on 1)

The component of claim 1, wherein said crest of said male thread has a height which creates a first gap between said crest and a corresponding root on an engaging female thread and said root has a depth which creates a second gap between said root and a corresponding crest on said engaging female thread, where said first gap is larger than said second gap.

### Claim 3 (depends on 1)

The component of claim 1, wherein said crest of said male thread has a height which creates a first gap between said crest and a corresponding root on an engaging female thread and said root has a depth which creates a second gap between said root and a corresponding crest on said engaging female thread, and wherein a clearance provided by said first gap is different than a clearance provided by said second gap.

### Claim 4

A component for a plasma cutting torch, said component comprising:
a body portion having an inner surface; and
a thread portion on said inner surface, where said thread portion comprises a female thread which has a crest with a crest width and a root with a root width, wherein a ratio between said crest width and said root width is in the range of 0.5 to 0.75, and where said female thread has angled sidewalls between said crest and said root, where said angled sidewalls have an included angle of 10 degrees,
wherein said female thread has 12 turns per inch.

### Claim 5 (depends on 4)

The component of claim 4, wherein said crest of said female thread has a height which creates a first gap between said crest and a corresponding root on an engaging male thread and said root has a depth which creates a second gap between said root and a corresponding crest on said engaging male thread, where said first gap is smaller than said second gap.

### Claim 6 (depends on 4)

The component of claim 4, wherein said crest of said female thread has a height which creates a first gap between said crest and a corresponding root on an engaging male thread and said root has a depth which creates a second gap between said root and a corresponding crest on said engaging male thread, wherein a clearance provided by said first gap is different than a clearance provided by said second gap.