Patent US3216713A successfully refreshed from Google Patents.
US3216713A
Expired / Lapsed
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Oxygen blowing lance fixing device for metallurgical refining furnaces
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1961-11-21
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Granted: 1965-11-09
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Imaida Takayuki
- 👤 Arima Takashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:05
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/46; C21C5/4606; C21C5/462
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
AN APPARATUS FOR MOUNTING AN OXYGEN BLOWING LANCE FOR USE IN AN APPARATUS FOR REFINING STEEL, COMPRISING AN OUTER SEALING RING ADAPTED TO BE SECURED AROUND AN APERTURE PROVIDED IN THE UPPER PART OF A COVERING OVER THE APPARATUS THROUGH WHICH APERTURE THE LANCE MAY GO UP AND DOWN FREELY, SAID OUTER SEALING RING HAVING AN INSIDE SURFACE WHICH IS UPWARDLY DIVERGING, AN INNER SEALING RING HAVING AN OUTSIDE SURFACE WHICH IS UPWARDLY DIVERGING AND WHICH FITS TIGHTLY WITH THE INSIDE SURFACE OF SAID OUTER SEALING RING, SAID INNER SEALING RING HAVING A CENTRAL BORE THERETHROUGH, A LANCE EXTENDING THROUGH THE BORE CLOSE TO THE SURFACE OF SAID INNER RING WHICH DEFINES SAID BORE, A HANGER FIXED TO THE LANCE AT A POSITION ABOVE SAID INNER RING, FLEXIBLE SUSPENSION MEMBERS MOUNTED AT THE UPPER END ON SAID HANGER AND CONNECTED AT THE LOWER END TO SAID INNER RING AND CONNECTING THE HANGER AND THE INNER RING SO THAT SAID INNER RING IS PULLED UP OUT OF SAID OUTER RING BY SAID SUSPENSION MEMBERS WHEN SAID LANCE IS WITHDRAWN FROM THE APERTURE IN THE COVERING.
Claim 2
Independent Claim
184 words
AN APPARATUS FOR MOUNTING AN OXYGEN BLOWING LANCE FOR USE IN AN APPARATUS FOR REFINING STEEL, COMPRISING AN OUTER SEALING RING ADAPTED TO BE SECURED AROUND AN APERTURE PROVIDED IN THE UPPER PART OF A COVERING OVER THE APPARATUS THROUGH WHICH APERTURE THE LANCE MAY GO UP AND DOWN FREELY, SAID OUTER SEALING RING HAVING AN INSIDE SURFACE WHICH IS UPWARDLY DIVERGING, AN INNER SEALING RING HAVING AN OUTSIDE SURFACE WHICH IS UPWARDLY DIVERGING AND WHICH FITS TIGHTLY WITH THE INSIDE SURFACE OF SAID OUTER SEALING RING, SAID INNER SEALING RING HAVING A CENTRAL BORE THERETHROUGH, A LANCE EXTENDING THROUGH THE BORE CLOSE TO THE SURFACE OF SAID INNER RING WHICH DEFINES SAID BORE, A HANGER FIXED TO THE LANCE AT A POSITION ABOVE SAID INNER RING, FLEXIBLE SUSPENSION MEMBERS MOUNTED AT THE UPPER END ON SAID HANGER AND CONNECTED AT THE LOWER END TO SAID INNER RING AND CONNECTING THE HANGER AND THE INNER RING SO THAT SAID INNER RING IS PULLED UP OUT OF SAID OUTER RING BY SAID SUSPENSION MEMBERS WHEN SAID LANCE IS WITHDRAWN FROM THE APERTURE IN THE COVERING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |