Patent US5211153A successfully refreshed from Google Patents.
US5211153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-cycle internal combustion gasoline engine cylinder
Assignee: Kioritz Corp
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Filing: 1992-01-31
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Granted: 1993-05-18
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Expires: 2012-01-31
Abstract
Abstract The present invention relates to a two-cycle internal combustion gasoline engine cylinder. The two-cycle engine cylinder according to this invention is characterized in that a smooth hard chromium plated layer is formed on a combustion chamber top inner surface of the cylinder.
Inventors
- 👤 Minoru Yonekawa
- 👤 Yoshiaki Nagao
- 👤 Yasuharu Sato
- 👤 Isao Masuda
- 👤 Tomohiro Ohtani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:52
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/02; F02F; F02F1/00; F02F1/002; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0403; F05C2201/0406
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
51 words
A two-cycle internal combustion gasoline engine cylinder, in which a smooth hard chromium plated layer is formed on a combustion chamber top inner surface of a cylinder; wherein said layer is formed simultaneously with a smooth hard chromium plated layer on a sliding surface of a cylinder chamber of said cylinder.
Claim 2
Dependent Claim
51 words
A two-cycle internal combustion gasoline engine cylinder, in which a smooth hard chromium plated layer is formed on a combustion chamber top inner surface of a cylinder; wherein said layer is formed simultaneously with a smooth hard chromium plated layer on a sliding surface of a cylinder chamber of said cylinder.
Claim 3
Dependent Claim
27 words
A two-cycle engine cylinder according to claim 1, wherein the hardness of said smooth hard chromium plated layers is of the order of Hv 800 to 1,000.
Claim 4
Dependent Claim
25 words
A two-cycle engine cylinder according to claim 1, wherein said cylinder comprises means for air-cooling comprising external cooling fins formed of a lightweight aluminum alloy.
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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) | 1996-05-17 | 1996-11-16 | 1997-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-17 | 2000-11-16 | 2001-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-17 | 2004-11-16 | 2005-05-18 | $7700.00 | Window Closed / Lapsed |