US3982905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous valve seat materials for internal combustion engines
Assignee: Honda Motor Co Ltd
•
Filing: 1973-12-28
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Granted: 1976-09-28
•
Expires: 1993-12-28
Abstract
Abstract This invention relates to a valve seat material for an internal combustion engine, which comprises a sintered ferrous alloy having the composition: }chromium 5-15 percent by weight }cobalt 5-20 }nickel 2-8 }tungsten 2-10 }molybdenum 0.2-12 }carbon 0.2-2 }the remainder being iron except for usual impuri- }ties and trace elements, } AND HAVING A POROSITY OF 5-25%. This alloy can also contain lead and a low melting point glass capable of showing a lubricating property at a low temperature.
Inventors
- 👤 Makoto Osawa
- 👤 Yoshitoshi Hagiwara
- 👤 Takao Kawakita
- 👤 Kenya Motoyoshi
- 👤 Nobuhito Kuroishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:14
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12153; Y10T428/12479
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
47 words
A valve seat material for an internal combustion engine, which comprises a sintered ferrous alloy having the composition: ______________________________________
percent by weight
______________________________________
chromium 5-15
cobalt 5-20
nickel 2-8
tungsten 2-10
molybdenum 0.2-12
carbon 0.2-2
the remainder being iron except for usual
impurities and trace elements,
______________________________________
Claim 2
Dependent Claim
47 words
A valve seat material for an internal combustion engine, which comprises a sintered ferrous alloy having the composition: ______________________________________
percent by weight
______________________________________
chromium 5-15
cobalt 5-20
nickel 2-8
tungsten 2-10
molybdenum 0.2-12
carbon 0.2-2
the remainder being iron except for usual
impurities and trace elements,
______________________________________
Claim 3
Dependent Claim
22 words
The valve seat material for an internal combustion engine according to claim 1, wherein said sintered ferrous alloy comprises in addition lead
Claim 4
Dependent Claim
51 words
A valve seat material for an internal combustion engine, which comprises a sintered ferrous alloy having the composition: ______________________________________
percent by weight
______________________________________
chromium 5-15
cobalt 5-20
nickel 2-8
tungsten 2-10
molybdenum 0.2-12
carbon 0.2-2
lead 0.3-10
glass 0.3-5
the remainder being iron except for usual
impurities and trace elements,
______________________________________
Claim 5
Dependent Claim
51 words
A valve seat material for an internal combustion engine, which comprises a sintered ferrous alloy having the composition: ______________________________________
percent by weight
______________________________________
chromium 5-15
cobalt 5-20
nickel 2-8
tungsten 2-10
molybdenum 0.2-12
carbon 0.2-2
lead 0.3-10
glass 0.3-5
the remainder being iron except for usual
impurities and trace elements,
______________________________________
Claim 6
Dependent Claim
27 words
The valve seat material for an internal combustion engine according to claim 1, wherein a part or all of the nickel is substituted by 2-8 % by
Claim 7
Dependent Claim
34 words
The valve seat material for an internal combustion engine according to claim 1, wherein said sintered ferrous alloy comprises in addition at least one of the substances selected from the group consisting of copper,
Claim 8
Dependent Claim
26 words
The valve seat material for an internal combustion engine according to claim 3, wherein a part or all of the nickel is substituted by 2-8% by
Claim 9
Dependent Claim
37 words
The valve seat material for an internal combustion engine according to claim 3, wherein said sintered ferrous alloy comprises in addition at least one of the substances selected from the group consisting of copper, aluminum and titanium.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |