US3925065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve seat materials for internal combustion engines
Assignee: Honda Motor Co Ltd
•
Filing: 1973-06-22
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Granted: 1975-12-09
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Expires: 1993-06-22
Abstract
Abstract A valve seat material for internal combustion engine, which comprises at least one lubricating material selected from the group consisting of lead and glass in a phosphorus-containing precipitation hardened austenitic matrix which is strengthened by the addition of cobalt.
Inventors
- 👤 Makoto Osawa
- 👤 Yoshitoshi Hagiwara
- 👤 Kunio Kusaka
- 👤 Takao Kawakita
- 👤 Kenya Motoyoshi
- 👤 Nobuhito Kuroishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:38
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0089; C22C38/00; C22C38/18; C22C38/40; C22C38/56
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
73 words
A VALVE SEAT MATERIAL FOR INTERNAL COMBUSTION ENGINES, WHICH CONSISTS ESSENTIALLY OF AT LEAST ONE LUBRICATING MATERIAL SELECTED FROM THE GROUP CONSISTING OF 0.2-10% LEAD AND 0.5-8% GLASS IN A PHOSPHORUS- CONTAINING PRECIPITATION HARDENED AUSTENITIC MATRIX WHICH IS STRENGTHENED BY THE ADDITION OF COBALT, SAID AUSTENITIC MATRIX CONSISTING OF 10-35% CHROMIUM, 8-45% NICKEL, 0.1-6.0% MOLYBDENUM, 0.2-2.5% CARBON, 0.05-0.7% PHOSPHORUS, 0.1-20% COBALT AND THE BALANCE IRON EXCEPT FOR IMPURITIES ASSOCIATED USUALLY WITH THESE ELEMENTS.
Claim 2
Dependent Claim
73 words
A VALVE SEAT MATERIAL FOR INTERNAL COMBUSTION ENGINES, WHICH CONSISTS ESSENTIALLY OF AT LEAST ONE LUBRICATING MATERIAL SELECTED FROM THE GROUP CONSISTING OF 0.2-10% LEAD AND 0.5-8% GLASS IN A PHOSPHORUS- CONTAINING PRECIPITATION HARDENED AUSTENITIC MATRIX WHICH IS STRENGTHENED BY THE ADDITION OF COBALT, SAID AUSTENITIC MATRIX CONSISTING OF 10-35% CHROMIUM, 8-45% NICKEL, 0.1-6.0% MOLYBDENUM, 0.2-2.5% CARBON, 0.05-0.7% PHOSPHORUS, 0.1-20% COBALT AND THE BALANCE IRON EXCEPT FOR IMPURITIES ASSOCIATED USUALLY WITH THESE ELEMENTS.
Claim 3
Dependent Claim
22 words
The valve seat material of claim 1 wherein said lubricating material is dispersed or impregnated in said phosphorus-containing precipitation hardened austenitic matrix.
Claim 4
Dependent Claim
16 words
The valve seat material of claim 1 wherein said glass is a glass containing phosphorus oxide.
Claim 5
Dependent Claim
91 words
A valve seat material for internal combustion engines, which consists essentially of at least one lubricating material selected from the group consisting of 0.2-10% lead and 0.5-8% glass in a phosphorus-containing precipitation hardened austenitic matrix which is strengthened by the addition of cobalt, said austenitic matrix consisting of 10-35% chromium, 8-45% nickel or manganese, 0.1-20% cobalt, 0.1-6% molybdenum, 1-8% tungsten, 0.2-2.5% carbon, 0.05-0.7% phosphorus, and the balance iron except for impurities usually associated with these elements, the relationships of CR + Ni<60%, Ni + Co<40% and W + MO<10% being satisfied.
Claim 6
Dependent Claim
91 words
A valve seat material for internal combustion engines, which consists essentially of at least one lubricating material selected from the group consisting of 0.2-10% lead and 0.5-8% glass in a phosphorus-containing precipitation hardened austenitic matrix which is strengthened by the addition of cobalt, said austenitic matrix consisting of 10-35% chromium, 8-45% nickel or manganese, 0.1-20% cobalt, 0.1-6% molybdenum, 1-8% tungsten, 0.2-2.5% carbon, 0.05-0.7% phosphorus, and the balance iron except for impurities usually associated with these elements, the relationships of CR + Ni<60%, Ni + Co<40% and W + MO<10% being satisfied.
Claim 7
Dependent Claim
22 words
The valve sEat material of claim 4 wherein said lubricating material is dispersed or impregnated in said phosphorus-containing precipitation hardened austenitic matrix.
Claim 8
Dependent Claim
16 words
The valve seat material of claim 4 wherein said glass is a glass containing phosphorus oxide.
Claim 9
Dependent Claim
48 words
A valve seat material for internal combustion engines, which consists of 10-35 % chromium, 8-45 % nickel, 0.1-6.0 % molybdenum, 0.1-20 % cobalt, 0.2-2.5 % carbon, 0.05-0.7 % phosphorus, and 0.2-10 % and 0.5-8 % glass, and the balance iron except for impurities associated usually with these elements.
Claim 10
Dependent Claim
48 words
A valve seat material for internal combustion engines, which consists of 10-35 % chromium, 8-45 % nickel, 0.1-6.0 % molybdenum, 0.1-20 % cobalt, 0.2-2.5 % carbon, 0.05-0.7 % phosphorus, and 0.2-10 % and 0.5-8 % glass, and the balance iron except for impurities associated usually with these elements.
Claim 11
Dependent Claim
78 words
A valve seat material for internal combustion engines, which consists of 10-35 % chromium, 8-45 % nickel, or manganese, 0.1-20 % cobalt, 0.1-6.0 % molybdenum, 1-8 % tungsten, 0.2-2.5 % carbon, 0.05-0.7 % phosphorus, and 0.2-10 % lead and 0.5-8 % glass, and the balance iron except for impurities usually associated with these elements, the relationships of Cr + Ni < 60 %, Ni + Co < 40 % and W + Mo < 10 % being satisfied.
Claim 12
Dependent Claim
78 words
A valve seat material for internal combustion engines, which consists of 10-35 % chromium, 8-45 % nickel, or manganese, 0.1-20 % cobalt, 0.1-6.0 % molybdenum, 1-8 % tungsten, 0.2-2.5 % carbon, 0.05-0.7 % phosphorus, and 0.2-10 % lead and 0.5-8 % glass, and the balance iron except for impurities usually associated with these elements, the relationships of Cr + Ni < 60 %, Ni + Co < 40 % and W + Mo < 10 % being satisfied.
Claim 13
Dependent Claim
81 words
A valve seat material for internal combustion engines, which consists of 10-35 % chromium, 8-45 % nickel, or manganese, 0.1-20 % cobalt, 0.1-6.0 % molybdenum, 1-8 % tungsten, 0.2-2.5 % carbon, not more than 0.05 % phosphorus, and 0.2-10 % lead and 0.5-8 % glass, and the balance iron except for impurities usually associated with these elements, the relationships of Cr + Ni < 60 %, Ni + Co < 40 % and W + No < 10 % being satisfied.
Claim 14
Dependent Claim
81 words
A valve seat material for internal combustion engines, which consists of 10-35 % chromium, 8-45 % nickel, or manganese, 0.1-20 % cobalt, 0.1-6.0 % molybdenum, 1-8 % tungsten, 0.2-2.5 % carbon, not more than 0.05 % phosphorus, and 0.2-10 % lead and 0.5-8 % glass, and the balance iron except for impurities usually associated with these elements, the relationships of Cr + Ni < 60 %, Ni + Co < 40 % and W + No < 10 % being satisfied.
References Cited (Backward Citations)
US2044165A
Cited
US2160423A
Cited
US2227065A
Cited
US2175683A
Cited
US2513470A
Cited
US3183084A
Cited
US3764303A
Cited
US3834898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |