Patent US4079720A successfully refreshed from Google Patents.
US4079720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relative combination of a cylinder and a seal ring for internal combustion engines
Assignee: Nippon Piston Ring Co Ltd
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Filing: 1976-05-11
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Granted: 1978-03-21
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Expires: 1996-05-11
Abstract
Abstract Improved wear characteristics of a seal ring for a piston and a mating cylinder are obtained by using selected materials for the seal ring and cylinder. The cylinder is characterized by having a surface coating of Ni or Ni alloy containing 3% to 8% of SiC having a particle size of from 0.5μ to 5μ, or by having a base member of Al or Al alloy containing 13% to 23% of Si having a particle size of 5μ to 8μ. The seal ring is characterized by having a Ni or Ni alloy containing 2% to 10% of SiC having a particle size of 0.5μ to 5μ.
Inventors
- 👤 Kentaro Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:32
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/26; F16J10/00; F16J10/02; F16J10/04; F05; F05C; F05C2203/00; F05C2203/08; F05C2203/0804; F05C2203/0813; F05C2203/0817
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
In an internal combustion engine having a cylinder wall mating with a piston seal ring, the improvement comprising, (a) the wear resistant surface of said cylinder wall being formed of a material selected from the group consisting of (i) aluminum or aluminum alloy containing 13 to 23 percent by weight of silicon particles having particle size of 5μ to 8μ, and (ii) nickel or nickel alloy containing 3 to 8 percent of silicon carbide particles having particle size of 0.5μ to 5μ, and (b) the wear resistant surface of said piston seal ring being a coating of nickel or nickel alloy containing 2 to 10 percent of silicon carbide having particle size of 0.5μ to 5μ.
Claim 2
Dependent Claim
116 words
In an internal combustion engine having a cylinder wall mating with a piston seal ring, the improvement comprising, (a) the wear resistant surface of said cylinder wall being formed of a material selected from the group consisting of (i) aluminum or aluminum alloy containing 13 to 23 percent by weight of silicon particles having particle size of 5μ to 8μ, and (ii) nickel or nickel alloy containing 3 to 8 percent of silicon carbide particles having particle size of 0.5μ to 5μ, and (b) the wear resistant surface of said piston seal ring being a coating of nickel or nickel alloy containing 2 to 10 percent of silicon carbide having particle size of 0.5μ to 5μ.
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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |