Patent US5172893A successfully refreshed from Google Patents.
US4745256A
Expired / Lapsed
US
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Narrow substrate having weld bead of powdered metal
Assignee: Sermatech International Inc
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Filing: 1986-03-06
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Granted: 1988-05-17
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Expires: 2006-03-06
Abstract
Abstract The welding method may be used to lay down weld beads on metallic substrates with a narrow width of 0.125 inch and less. The process employs a plasma transferred arc and pulses the current delivered to the arc such that a wave form having at least a main amplitude and a lower auxiliary amplitude is provided. The powdered metal which is delivered is laid down in a series of overlapping weld deposits which solidify very rapidly and produce a fine grain structure.
Inventors
- 👤 Gary C. Shubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:35
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/04; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
77 words
A metallic substrate having a narrow longitudinally disposed surface and at least one layer of a single weld bead deposit made from powdered metal on said surface characterized in that said bead is formed of a longitudinally aligned series of overlapping weld deposits and has a width of from 0.020 inch to 0.125 inch and wherein the ratio of the width of said substrate width to the width of said bead deposit is from 0.5:1 to 1:1.
Claim 2
Dependent Claim
77 words
A metallic substrate having a narrow longitudinally disposed surface and at least one layer of a single weld bead deposit made from powdered metal on said surface characterized in that said bead is formed of a longitudinally aligned series of overlapping weld deposits and has a width of from 0.020 inch to 0.125 inch and wherein the ratio of the width of said substrate width to the width of said bead deposit is from 0.5:1 to 1:1.
Claim 3
Dependent Claim
19 words
A metallic substrate as set forth in claim 1 wherein said substrate is a 0.50 inch diameter steel bar.
Claim 4
Dependent Claim
29 words
A metallic substrate as set forth in claim 1 wherein the ratio of bead deposit height to bead deposit width is in the range of from 0.5:1 to 2:1.
Claim 5
Dependent Claim
22 words
A metallic substrate as set forth in claim 1 having a plurality of said layers disposed in overlying relation to each other.
Claim 6
Dependent Claim
66 words
A metallic substrate having a narrow edge surface and at least one weld bead deposit layer made from powdered metal on said edge surface having a longitudinally aligned series of overlapping weld deposits and a width of from 0.020 inch to 0.125 inch and wherein the ratio of the width of said narrow surface to the width of said bead deposit is from 0.5:1 to 1:1.
Claim 7
Dependent Claim
66 words
A metallic substrate having a narrow edge surface and at least one weld bead deposit layer made from powdered metal on said edge surface having a longitudinally aligned series of overlapping weld deposits and a width of from 0.020 inch to 0.125 inch and wherein the ratio of the width of said narrow surface to the width of said bead deposit is from 0.5:1 to 1:1.
Claim 8
Dependent Claim
23 words
A metallic substrate as set forth in claim 5, wherein said bead deposit has a thickness of from 0.010 inch to 0.125 inch.
Claim 9
Dependent Claim
29 words
A metallic substrate as set forth in claim 5 wherein the ratio of bead deposit height to bead deposit width is in the range of from 0.5:1 to 2:1.
Claim 10
Dependent Claim
39 words
A metallic substrate as set forth in claim 5 wherein said bead deposit is of a material selected from the group consisting of metals, metal alloys, mixtures of metals and metal alloys and metal mixtures containing refractory hard materials.
Claim 11
Dependent Claim
26 words
A metallic substrate as set forth in claim 5 wherein said bead deposit is of a material selected from iron base, nickel base and cobalt-base alloys.
Claim 12
Dependent Claim
26 words
A metallic substrate as set forth in claim 5 wherein said bead deposit is of a material selected from tungsten carbide, titanium carbide and vanadium-tungsten carbide.
Claim 13
Dependent Claim
17 words
A metallic substrate as set forth in claim 5 characterized in having multiple bead deposit layers thereon.
Claim 14
Dependent Claim
18 words
A metallic substrate as set forth in claim 5 wherein said bead deposit is of a carbide material.
Claim 15
Dependent Claim
40 words
A metallic substrate as set forth in claim 5 wherein said bead deposit is comprised of a mixture of materials, one of said materials being selected from the group consisting of iron-, nickel-, and cobalt-base alloys mixed with a carbide.
Claim 16
Dependent Claim
26 words
A metallic substrate as set forth in claim 13 wherein said carbide is selected from the group consisting of tungsten carbide, titanium carbide and vanadium-tungsten carbide.
Claim 17
Dependent Claim
39 words
A metallic substrate as set forth in claim 5 wherein said deposit layer has a width of from 0.035 to 0.070 inches and said ratio of said narrow surface width to deposit layer width is between 1:1 to 1:2.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |