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 Title: |
US5877471:
Plasma torch having a cooled shield assembly
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Huhn, William A.; Fairbanks, AK
Dickman, Richard D.; Two Rivers, AK
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| Assignee: |
The Regents of the University of California, Oakland, CA
other patents from UNIVERSITY OF CALIFORNIA, THE REGENTS OF (599425) (approx. 4,840)
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| Published / Filed: |
1999-03-02
/ 1997-06-11
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| Application Number: |
US1997000873259
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| IPC Code: |
Advanced:
H05H 1/28;
H05H 1/30;
Core:
H05H 1/26;
IPC-7:
B23K 10/00;
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| U.S. Class: |
Current:
219/121.49;
219/121.43;
219/121.48;
219/121.52;
315/111.51;
Original:
219/121.49;
219/121.43;
219/121.52;
219/121.48;
315/111.51;
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| Field of Search: |
219/121.52,121.43,121.49,75,121.48
313/231.31,231.41
315/111.51,111.21
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| Priority Number: |
| 1997-06-11 |
US1997000873259 |
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| Abstract: |
A plasma torch assembly for receiving electrical energy from an electrical energy source and generating a plasma in a gas from a gas source includes an induction coil to receive electrical energy from the electrical energy source and provide energy to generate an electromagnetic field for the plasma and a shield assembly to shield against energy from the plasma and transfer energy from the induction coil to the plasma. The shield assembly includes a dielectric cylinder, ceramic encasement lining and a plurality of thin walled tubes arranged in a circular array. The tubes are encased by and partially embedded in an encasement lining made of thermal resistant ceramic material that is molded or potted upon the outside surface of and between the metal tubes. The dielectric cylinder, tightly disposed over the encasement lining, provides a water proof barrier for the tubes and supports the ability to draw a vacuum. A water coolant jacket envelope, discharge isolator and the coil surround the shield assembly.
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| Attorney, Agent or Firm: |
Fulbright & Jaworski L.L.P. ;
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| Primary / Asst. Examiners: |
Paschall, Mark H.;
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| INPADOC Legal Status: |
Show legal status actions
Family Legal Status Report
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| Family: |
Show 3 known family members
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First Claim:
Show all 32 claims |
What is claimed is:
1. A plasma torch assembly for receiving electrical energy from an electrical energy source and generating a plasma in a gas from a gas source, comprising:
- a field-generating structure to receive electrical energy from the electrical energy source and provide energy to generate an electromagnetic field in a space for the plasma said field-generating structure disposed along and about the space for the plasma;
- a shield assembly, disposed along and about the space for the plasma between said field-generating structure and the space for the plasma, to shield against energy from the plasma and transfer energy from said structure, said shield assembly including a liner and coolant structures embedded in said liner.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 16 U.S. patent(s) that reference this one
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| Foreign References: |
None
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| Other References: |
Babat, George I.; "Electrodeless Discharges and some Allied Problems", Journal of the Institute of Electrical Engineers; vol. 94, Part III, pp. 17-27, 1947.
Reed, Thomas B.; "Induction-Coupled Plasama Torch", Journal of Applied Physics; vol.32, No. 5, pp. 821-824, May 1961.
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