US3930139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonconsumable electrode for oxygen arc working
Assignee: Individual
•
Filing: 1974-05-28
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Granted: 1975-12-30
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Expires: 1994-05-28
Abstract
Abstract A nonconsumable electrode for oxygen arc working, comprising a holder produced from copper or alloys thereof and an active insert fastened to the end face of the holder and which is in thermal and electrical contact with said holder through a metal distance piece disposed between the active insert and the holder and over their entire contact surface area, the metal distance piece being manufactured from aluminium or alloys thereof and the active insert being from hafnium or from hafnium with yttrium and neodymium oxides as dopants therein taken either separately or in combination.
Inventors
- 👤 David Grigorievich Bykhovsky
- 👤 Alexandr Yakovlevich Medvedev
- 👤 Yakov Vulfovich Rossomakho
- 👤 Margarita Nikolaevna Butova
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:18
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; B23K35/22; B23K35/222; H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; H05H1/3421; H05H1/3436; H05H1/3442
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A NONCONSUMABLE ELECTRODE FOR OOXYGEN ARC WORKING, COMPRISING: A HOLDER MADE FROM A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND ALLOYS THEREOF; AN ACTIVE INSERT FASTENED TO THE END FACE OF SAID HOLDER AND PRODUCED FROM A METAL SELLECTED FROM THE GROUP CONSISTING OF HAFNIUM, AND HAFNIUM IN COMBINATION WITH DOPANTS SELECTED FROM THE GROUP CONSISTING OF YTTRIUM OXIDE; NEODYMIUM OXIDE, AND A COMBINATION OF YTTRIUM AND NEODYMIUM OXIDE; A METAL SPACER DISPOSED BETWEEN SAID HOLDER AND SAID ACTIVE INSERT EXTENDING OVER THE ENTIRE CONTACT SURFACE AREA THEREOF SO THAT SAID ACTIVE INSERT IS IN THERMAL AND ELECTRIC CONTACT WITH SAID HOLDER
Claim 2
Dependent Claim
104 words
A NONCONSUMABLE ELECTRODE FOR OOXYGEN ARC WORKING, COMPRISING: A HOLDER MADE FROM A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND ALLOYS THEREOF; AN ACTIVE INSERT FASTENED TO THE END FACE OF SAID HOLDER AND PRODUCED FROM A METAL SELLECTED FROM THE GROUP CONSISTING OF HAFNIUM, AND HAFNIUM IN COMBINATION WITH DOPANTS SELECTED FROM THE GROUP CONSISTING OF YTTRIUM OXIDE; NEODYMIUM OXIDE, AND A COMBINATION OF YTTRIUM AND NEODYMIUM OXIDE; A METAL SPACER DISPOSED BETWEEN SAID HOLDER AND SAID ACTIVE INSERT EXTENDING OVER THE ENTIRE CONTACT SURFACE AREA THEREOF SO THAT SAID ACTIVE INSERT IS IN THERMAL AND ELECTRIC CONTACT WITH SAID HOLDER
Claim 3
Dependent Claim
25 words
The nonconsumable electrode of claim 1, wherein the thickness of the metal spacer produced from aluminium or alloys thereof, is from 0.01 to 0.2 mm.
Claim 4
Dependent Claim
28 words
The nonconsumable electrode of claim 1, wherein the active insert is made from hafnium with yttrium oxide as a dopant, with the weight percentage of the components being:
Claim 5
Dependent Claim
29 words
The nonconsumable electrode of claim 1, wherein the active insert is manufactured from hafnium with yttrium and neodymium oxides as dopants, with the weight percentage of the components being:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |