US3628778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inner cover and method of making the same
Assignee: United States Steel Corp
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Filing: 1970-04-02
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Granted: 1971-12-21
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Expires: 1990-04-02
Abstract
Abstract An annealing inner cover is formed of a plurality of arcuate plates having outwardly flared flanges along their vertical edges. The plates are connected by welds along adjacent vertical edges to form a circular shell having a plurality of spaced triangular projections formed by the flanges. A plurality of steel bands encircle the shell at several locations and bear against the apicies of the projections. The bands are held in place by U-shaped clips having the ends of their legs welded to the shell. A dome or roof is welded to the top of the shell. All welds are gastight.
Inventors
- 👤 Frank Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:53
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/663; C21D9/673
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A metal inner cover comprising a plurality of vertically extending arcuate plates having outwardly flared flanges along each vertical edge, gastight welds connecting the ends of the flanges of adjacent plates to form a generally circular shell having a plurality of projections formed by said flanges, a plurality of vertically spaced apart bands surrounding said shell in contact with the apices of said projections and in spaced relationship with the remainder of the shell, said bands being free to move with respect to said apices, and a roof dome attached to the top of said plates.
Claim 2
Dependent Claim
96 words
A metal inner cover comprising a plurality of vertically extending arcuate plates having outwardly flared flanges along each vertical edge, gastight welds connecting the ends of the flanges of adjacent plates to form a generally circular shell having a plurality of projections formed by said flanges, a plurality of vertically spaced apart bands surrounding said shell in contact with the apices of said projections and in spaced relationship with the remainder of the shell, said bands being free to move with respect to said apices, and a roof dome attached to the top of said plates.
Claim 3
Dependent Claim
61 words
A metal inner cover according to claim 1 including a plurality of spaced-apart U-shaped clips having the end of their legs welded to the arcuate portion of said plates between said apices with the inner side of their bases spaced from the plates a distance slightly greater than the height of said projections, said bands being received in said U-shaped clips.
Claim 4
Dependent Claim
35 words
A metal inner cover according to claim 1 including a flat bottom ring welded to the bottom of said plates and extending from the inner periphery of said plates to the apices of said projections.
Claim 5
Dependent Claim
61 words
A metal inner cover according to claim 3 including a plurality of spaced-apart U-shaped clips having the ends of their legs welded to the arcuate portion of said plates between said apices with the inner side of their bases spaced from the plates a distance slightly greater than the height of said projections, said bands being received in said U-shaped clips.
Claim 6
Independent Claim
107 words
The method of making a metal inner cover having spaced-apart projections which comprises providing a sufficient number of arcuate plates to form a cylinder, each having a flange at each end flaring outwardly along each longitudinal edge, arranging said arcuate plates side by side with the longitudinal edges of adjacent plates in substantial abutment, welding the longitudinal edges of adjacent plates together in gastight rElationship, welding a roof dome to the top of said plates, and placing a plurality of bands around said welded together plates in spaced-apart relationship in contact with the apices of said projections and in spaced relationship with the remainder of the plates.
Claim 7
Independent Claim
107 words
The method of making a metal inner cover having spaced-apart projections which comprises providing a sufficient number of arcuate plates to form a cylinder, each having a flange at each end flaring outwardly along each longitudinal edge, arranging said arcuate plates side by side with the longitudinal edges of adjacent plates in substantial abutment, welding the longitudinal edges of adjacent plates together in gastight rElationship, welding a roof dome to the top of said plates, and placing a plurality of bands around said welded together plates in spaced-apart relationship in contact with the apices of said projections and in spaced relationship with the remainder of the plates.
Claim 8
Dependent Claim
28 words
The method of claim 1 which includes welding a plurality of spaced-apart U-shaped clips to the arcuate portion of said plates between said apices for supporting said bands.
Claim 9
Dependent Claim
24 words
A metal inner cover according to claim 1 in which said arcuate plates are free of internal connections at the base of said projections.
Claim 10
Dependent Claim
24 words
A metal inner cover according to claim 2 in which said arcuate plates are free of internal connections at the base of said projections.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |