Patent US3688080A successfully refreshed from Google Patents.
US3688080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding
Assignee: Individual
•
Filing: 1970-08-31
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Granted: 1972-08-29
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Expires: 1990-08-31
Abstract
Abstract A method of welding wherein molten weld material, directed under the influence of heat along a weld zone extending from one side to the other of a workpiece, is reflected back by a screen located on the other side of the workpiece. The weld material in the zone of the root of the weld and substantially throughout the remainder of the body of weld material is maintained in a molten condition for a period of time sufficient to permit intimate fusion between weld material and parent material at the root and substantially throughout the remainder of the weld. The method is particularly suited for forming button welds. The completed weld has the cross-sectional configuration of an hourglass.
Inventors
- 👤 Andrew John Cartwright
- 👤 Frederick Timothy Cartwright
- 👤 Peter Charles St Jo Cartwright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:38
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/035
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
178 words
A method of welding in a weld zone extending from one side to the other of at least one workpiece, which includes the steps of applying heat to the weld zone from one side of said at least one workpiece to said other side until molten weld material at least partly fills the weld zone, reflecting heat and deflecting molten weld material back from said other side of said at least one workpiece, maintaining weld material at the root of the weld and substantially throughout the remainder of the body of the weld material in a molten condition for a period of time sufficient to permit intimate fusion between the weld material and the material of said at least one workpiece at the root and substantially throughout the remainder of the weld and also to flare the weld material transversely at the root of the weld to form a weld body which has a head thereon within said at least one workpiece on said other side of said at least one workpiece at the root of the weld.
Claim 2
Independent Claim
178 words
A method of welding in a weld zone extending from one side to the other of at least one workpiece, which includes the steps of applying heat to the weld zone from one side of said at least one workpiece to said other side until molten weld material at least partly fills the weld zone, reflecting heat and deflecting molten weld material back from said other side of said at least one workpiece, maintaining weld material at the root of the weld and substantially throughout the remainder of the body of the weld material in a molten condition for a period of time sufficient to permit intimate fusion between the weld material and the material of said at least one workpiece at the root and substantially throughout the remainder of the weld and also to flare the weld material transversely at the root of the weld to form a weld body which has a head thereon within said at least one workpiece on said other side of said at least one workpiece at the root of the weld.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the weld is a button weld.
Claim 4
Dependent Claim
16 words
The method of claim 1 wherein the heat is reflected by a screen comprising reflective material.
Claim 5
Dependent Claim
51 words
The method of claim 3 wherein the screen is composed of a material which is resistant to heat and to the weld material, has a low heat absorption so that it may reflect heat and is inert so as not to give off gas or any liquid or solid contaminating substance.
Claim 6
Dependent Claim
12 words
The method of claim 4 wherein the screen is a ceramic material.
Claim 7
Dependent Claim
21 words
The method of claim 3 wherein the screen is composed entirely of the reflective material and is thus of monolithic structure.
Claim 8
Dependent Claim
16 words
The method of claim 3 wherein the screen comprises reflective material mounted on a supporting substrate.
Claim 9
Independent Claim
119 words
A method of welding in a weld zone extending from one side to the other of at least one workpiece, which includes the steps of applying heat to the weld zone from one side of said at least one workpiece to said other side until molten weld material at least partly fills the weld zone, reflecting heat and deflecting molten weld material back from said other side of said at least one workpiece to flare the weld material transversely at the root of the weld in order to form a weld body which has a head thereon within said at least one workpiece on said other side of said at least one workpiece at the root of the weld.
Claim 10
Independent Claim
119 words
A method of welding in a weld zone extending from one side to the other of at least one workpiece, which includes the steps of applying heat to the weld zone from one side of said at least one workpiece to said other side until molten weld material at least partly fills the weld zone, reflecting heat and deflecting molten weld material back from said other side of said at least one workpiece to flare the weld material transversely at the root of the weld in order to form a weld body which has a head thereon within said at least one workpiece on said other side of said at least one workpiece at the root of the weld.
Claim 11
Independent Claim
96 words
A method of welding from one side only of at least one workpiece which includes the steps of using a deeply penetrating welding process in a weld zone extending from said one side of said at least one workpiece to the other side thereof, reflecting heat and deflecting molten weld material back from said other side of said at least one workpiece with a reverberatory action to flare the weld material transversely at the root of the weld in order to produce a weld body in said at least one workpiece which has an hourglass configuration.
Claim 12
Independent Claim
96 words
A method of welding from one side only of at least one workpiece which includes the steps of using a deeply penetrating welding process in a weld zone extending from said one side of said at least one workpiece to the other side thereof, reflecting heat and deflecting molten weld material back from said other side of said at least one workpiece with a reverberatory action to flare the weld material transversely at the root of the weld in order to produce a weld body in said at least one workpiece which has an hourglass configuration.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |