Global Patent Index - EP 1258177 A1

EP 1258177 A1 2002-11-20 - THREE-PHASE PLASMA GENERATOR HAVING ADJUSTABLE ELECTRODES

Title (en)

THREE-PHASE PLASMA GENERATOR HAVING ADJUSTABLE ELECTRODES

Title (de)

DREIPHASEN-PLASMAGENERATOR MIT EINSTELLBAREN ELEKTRODEN

Title (fr)

GENERATEUR DE PLASMA TRIPHASE A ELECTRODES AJUSTABLES

Publication

EP 1258177 A1 (EN)

Application

EP 00902432 A

Priority

US 0001123 W

Abstract (en)

[origin: WO0154464A1] Three adjustable electrodes (33a-33c) within a chamber (40) form a thermal plasma generating system (30). The electrodes (33a-33c) are positioned with a narrow gap at one portion and a wide gap at another portion to form a cone shape. The gap between the electrodes is adjusted to accommodate for wear on the electrodes (33a-33c). An electric arc is initiated at the narrowest point between two electrodes which moves over the length of the electrodes because of a magnetic field created by the arc and the forward motion of the injected stream. At the end of the electrodes, the arc is extinguished and another arc is initiated. The continuous are moving along the electrodes ionizes a working stream that is tangentially injected from three pneumatic rings (35a-35c) which provide improved mixing of the working stream for high quality thermal plasma. The thermal plasma exits through a narrow orifice (42).

IPC 1-7 (main, further and additional classification)

H05H 1/36

IPC 8 full level (invention and additional information)

H05H 1/36 (2006.01); H05H 1/44 (2006.01); H05H 1/48 (2006.01)

CPC (invention and additional information)

H05H 1/44 (2013.01); H05H 1/36 (2013.01); H05H 1/48 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0154464 A1 20010726; CA 2397756 A1 20010716; EP 1258177 A1 20021120; EP 1258177 A4 20070307

INPADOC legal status


2010-09-03 [REG HK WD] APPLICATIONS WITHDRAWN, DEEMED TO BE WITHDRAWN, OR REFUSED AFTER PUBLICATION IN HONG KONG

- Document: HK 1051293

2010-02-10 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20090801

2007-07-18 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20070613

2007-03-07 [A4] DESPATCH OF SUPPLEMENTARY SEARCH REPORT

- Effective date: 20070206

2007-03-07 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: H05H 1/36 20060101AFI20010728BHEP

2007-03-07 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: H05H 1/44 20060101ALI20070201BHEP

2002-11-20 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020815

2002-11-20 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE