US4223877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annealing furnace
Assignee: Lee Wilson Engineering Co Ltd
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Filing: 1978-12-29
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Granted: 1980-09-23
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Expires: 1998-12-29
Abstract
Abstract A protective sleeve, for a cover used to enclose metal coils in an annealing furnace having a plurality of fuel burners whereby the coils are protected from the direct flame of the burners, comprising a circumscribing band mounted on the cover and held in spaced relationship from the cover, the band being interposed between the cover and the burners.
Inventors
- 👤 Karl Sanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:15
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/0006; C21D9/0025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A protective sleeve, for a cover used to enclose metal coils and the like in an annealing furnace having a plurality of fuel burners whereby the coils are protected from the direct flame of the burners, comprising a circumscribing band interposed between the cover and the burners, the band being mounted on the cover and held in spaced relationship therefrom by a spaced pair of bracket means fixed on the cover each in a ring arrangement, the band being threaded between the pair of bracket means and held thereby.
Claim 2
Dependent Claim
89 words
A protective sleeve, for a cover used to enclose metal coils and the like in an annealing furnace having a plurality of fuel burners whereby the coils are protected from the direct flame of the burners, comprising a circumscribing band interposed between the cover and the burners, the band being mounted on the cover and held in spaced relationship therefrom by a spaced pair of bracket means fixed on the cover each in a ring arrangement, the band being threaded between the pair of bracket means and held thereby.
Claim 3
Dependent Claim
43 words
A sleeve as claimed in claim 1 in which the ring arrangement of each bracket means comprises a plurality of laterally spaced brackets each of said brackets forming a channel, the lateral edges of the band lying in the channels of the brackets.
Claim 4
Dependent Claim
30 words
A sleeve as claimed in claim 2 in which each bracket includes a base member fixed to the cover, the band being spaced from the cover by the base member.
Claim 5
Dependent Claim
15 words
A sleeve as claimed in claim 1 in which the material thereof is stainless steel.
Claim 6
Dependent Claim
18 words
A sleeve as claimed in claim 1 in which the ends of the band are butt welded together.
References Cited (Backward Citations)
US3370993A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |