Patent US3917240A successfully refreshed from Google Patents.
US3917240A
Expired / Lapsed
US
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Apparatus for projecting pieces of a deoxidizing agent into molten steel
Assignee: Nippon Steel Corp
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Filing: 1973-10-17
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Granted: 1975-11-04
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Expires: 1993-10-17
Abstract
Abstract An apparatus for projecting pieces of a deoxidizing agent into a molten steel wherein the pieces are thrust into a body of molten steel to a depth such that the pieces will become completely dissolved as they float upwardly through the molten steel. Thus, loss of deoxidizing agent is substantially eliminated and a homogenous steel product is obtained.
Inventors
- 👤 Toyosuke Tanoue
- 👤 Taiji Araki
- 👤 Takeo Aoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:11
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
88 words
AN APPARATUS FOR CONTINUOUSLY PROJECTING PIECES OF A DEOXIDIZING AGENT INTO MOLTEN STEEL, COMPRISING: PROJECTION MEANS FOR PROJECTING SAID PIECES INTO THE MOLTEN STEEL IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE UPPER SURFACE OF THE MOLTEN STEEL AT AN INITIAL VELOCITY SELECTED SUCH THAT SAID PIECES DESCEND TO A PREDETERMINED DEPTH WITHIN THE MOLTEN STEEL, MEANS FOR FEEDING SAID PIECES TO SAID PROJECTION MEANS, AND MEANS FOR ADJUSTING SAID PROJECTION MEANS SO THAT THE INITIAL VELOCITY AT WHICH SAID PIECES ARE PROJECTED IS DEFINED BY THE FOLLOWING RELATIONSHIP
Claim 2
Independent Claim
88 words
AN APPARATUS FOR CONTINUOUSLY PROJECTING PIECES OF A DEOXIDIZING AGENT INTO MOLTEN STEEL, COMPRISING: PROJECTION MEANS FOR PROJECTING SAID PIECES INTO THE MOLTEN STEEL IN A DIRECTION SUBSTANTIALLY PERPENDICULAR TO THE UPPER SURFACE OF THE MOLTEN STEEL AT AN INITIAL VELOCITY SELECTED SUCH THAT SAID PIECES DESCEND TO A PREDETERMINED DEPTH WITHIN THE MOLTEN STEEL, MEANS FOR FEEDING SAID PIECES TO SAID PROJECTION MEANS, AND MEANS FOR ADJUSTING SAID PROJECTION MEANS SO THAT THE INITIAL VELOCITY AT WHICH SAID PIECES ARE PROJECTED IS DEFINED BY THE FOLLOWING RELATIONSHIP
Claim 3
Dependent Claim
76 words
An apparatus for continuously projecting pieces of a deoxidizing agent as set forth in claim 1 wherein a compressed fluid is used as a projecting energy, said apparatus comprising a cylinder having an introducing tube for introducing the compressed fluid, a projecting tube fitted to said cylinder to project the pieces of deoxidizing agent with the compressed fluid and said means for feeding feeds the pieces of deoxidizing agent one by one to said projecting tube.
Claim 4
Dependent Claim
71 words
An apparatus for continuously projecting pieces of a deoxidizing agent as set forth in claim 1 wherein the pressure of a spring is used as a projecting energy, said apparatus comprising a cylinder interengaging with said spring, a projecting tube to project the pieces of deoxidizing agent with the pressure of said spring and said means for feeding feeds the pieces of deoxidizing agent one by one to said projecting tube.
Claim 5
Dependent Claim
79 words
An apparatus for continuously projecting pieces of a deoxidizing agent as set forth in claim 1 wherein an exploding powder is used as a projecting energy, said apparatus comprising a bolt for locking, a hammer to fire a fuse of a cartridge having each piece of deoxidizing agent as a bullet and charged with the exploding powder, a projecting tube to project the bullets and said means for feeding feeds said bullets one by one to said projecting tube.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |