Patent US3679858A successfully refreshed from Google Patents.
US3679858A
Expired / Lapsed
US
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Method forming clad plates from curved surfaces
Assignee: Detroit Flame Hardening Co
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Filing: 1971-03-17
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Granted: 1972-07-25
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Expires: 1991-03-17
Abstract
Abstract A plate having a special surface layer is made by shaping to a desired configuration a longitudinal section cut from a tube that has been surfaced by a suitable continuous welding deposition process, preferably a bulk welding process.
Inventors
- 👤 William C Bollinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:47
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/04; B23K9/044; B23K9/046; B23K9/048; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
A method of hard surfacing which comprises fusing by a high temperature weld process a coating of hard surfacing alloy on the convex side of a curved metal part and thereafter flattening the part to reduce the convexity of the convex side.
Claim 2
Independent Claim
42 words
A method of hard surfacing which comprises fusing by a high temperature weld process a coating of hard surfacing alloy on the convex side of a curved metal part and thereafter flattening the part to reduce the convexity of the convex side.
Claim 3
Dependent Claim
25 words
A method as set forth in claim 1 including the step of cooling the part to room temperature and flattening it while at room temperature.
Claim 4
Independent Claim
40 words
The method of hard surfacing plate which comprises fusing by a high temperature weld process a coating of a hard surfacing alloy on the outside of a tube, longitudinally sectioning the tube, and flattening a section removed from the tube.
Claim 5
Independent Claim
40 words
The method of hard surfacing plate which comprises fusing by a high temperature weld process a coating of a hard surfacing alloy on the outside of a tube, longitudinally sectioning the tube, and flattening a section removed from the tube.
Claim 6
Dependent Claim
25 words
A method as set forth in claim 3 including the step of cooling the tube after welding and flattening the section while it is cool.
Claim 7
Dependent Claim
15 words
A method as set forth in claim 4 wherein the weld process is bulk welding.
Claim 8
Dependent Claim
18 words
A method as set forth in claim 3 wherein the tube is rotated about its axis during welding.
Claim 9
Dependent Claim
27 words
A method as set forth in claim 3 wherein the weld process deposits longitudinal weld bands on the tube to cover the outer surface of the tube.
Claim 10
Dependent Claim
27 words
A method as set forth in claim 3 wherein the weld process deposits circular weld bands on the tube to cover the outer surface of the tube.
Claim 11
Independent Claim
67 words
The method of making flat plate having a protective coating on one face which comprises fusing at a high temperature a protective alloy coating on the outside periphery of a metal tube, cooling the tube to substantially room temperature, longitudinally sectioning the tube to form tube segments, and applying straightening pressure to the segments to flatten them into planar plate having a protective coating on one side.
Claim 12
Independent Claim
67 words
The method of making flat plate having a protective coating on one face which comprises fusing at a high temperature a protective alloy coating on the outside periphery of a metal tube, cooling the tube to substantially room temperature, longitudinally sectioning the tube to form tube segments, and applying straightening pressure to the segments to flatten them into planar plate having a protective coating on one side.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |