US4346684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat ring
Assignee: Goetze GmbH
•
Filing: 1980-04-30
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Granted: 1982-08-31
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Expires: 2000-04-30
Abstract
Abstract A sintered valve seat ring having excellent resistance to wear, to corrosion and to thermal stresses, and a method for its production. The ring comprises a supporting portion made up of an iron or steel alloy and a facing portion, subject to wear, of a cobalt and/or nickel alloy. The supporting portion comprises up to 30% by weight of the alloy of the facing portion.
Inventors
- 👤 Paul Vossieck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:17
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; F; F01; F01L; F01L3/00; F01L3/22; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49298; Y10T29/49306
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
86 words
In a sintered valve seat ring including an annular supporting portion and an annular facing portion superposed on the supporting portion; said supporting portion comprising a material selected from the group consisting of an iron alloy and a steel alloy and said facing portion comprising a material selected from the group consisting of a nickel alloy, a cobalt alloy and a nickel-cobalt alloy; the improvement wherein said supporting portion additionally comprises, distributed therein, up to 30% by weight of the alloy selected for said facing portion.
Claim 2
Dependent Claim
86 words
In a sintered valve seat ring including an annular supporting portion and an annular facing portion superposed on the supporting portion; said supporting portion comprising a material selected from the group consisting of an iron alloy and a steel alloy and said facing portion comprising a material selected from the group consisting of a nickel alloy, a cobalt alloy and a nickel-cobalt alloy; the improvement wherein said supporting portion additionally comprises, distributed therein, up to 30% by weight of the alloy selected for said facing portion.
Claim 3
Dependent Claim
26 words
A valve seat ring as defined in claim 1, wherein the supporting portion comprises up to 10% by weight of the alloy of the facing portion.
Claim 4
Dependent Claim
60 words
A valve seat ring as defined in claim 1, wherein the alloy of the facing portion comprises 10% to 14% cobalt, a maximum of 1.5% carbon, 10% to 28% chromium, 3% to 14% at least one of the materials selected from the group consisting of tungsten and molybdenum, 1% to 2% copper, up to 8% iron and the balance nickel.
Claim 5
Dependent Claim
60 words
A valve seat ring as defined in claim 1, wherein the alloy of the facing portion comprises 10% to 14% nickel, a maximum of 1.25% carbon, 3% to 14% at least one of the materials selected from the group consisting of tungsten and molybdenum, 18% to 28% chromium, 2% to 4% copper, up to 8% iron and the balance cobalt.
Claim 6
Dependent Claim
36 words
A valve seat ring as defined in claim 1, wherein the alloy of the supporting portion comprises up to 5% at least one of the materials selected from the group consisting of elemental boron and silicon.
Claim 7
Dependent Claim
31 words
A valve seat ring as defined in claim 1, wherein the axially measured thickness of the facing portion is about one-third of the axially measured thickness of the valve seat ring.
Claim 8
Dependent Claim
28 words
A valve seat ring as defined in claim 1, wherein the facing portion additionally comprises, distributed therein, up to 30% of the alloy selected for the supporting portion.
Claim 9
Dependent Claim
25 words
A valve seat ring as defined in claim 7, wherein the facing portion comprises up to 10% of the alloy selected for the supporting portion.
Claim 10
Dependent Claim
28 words
A valve seat ring as defined in claim 1, wherein the alloy of the supporting portion comprises up to 5% by weight of a low melting point alloy.
Claim 11
Dependent Claim
68 words
A valve seat ring as defined in claim 9, wherein said low melting point alloy comprises up to 1.25% carbon, 18% to 28% chromium, 10% to 14% at least one of the materials selected from the group consisting of tungsten and molybdenum, 1% to 4% boron, 1% to 4.5% silicon and the balance at least one of the materials selected from the group consisting of nickel and cobalt.
References Cited (Backward Citations)
US2101970A
Cited
US2100620A
Cited
US2296460A
Cited
US2753859A
Cited
US2753858A
Cited
US3428035A
Cited
DE2139738C3
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |