Patent US4217875A successfully refreshed from Google Patents.
US4217875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder head for internal combustion engines, especially diesel engines
Assignee: Individual
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Filing: 1978-05-16
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Granted: 1980-08-19
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Expires: 1998-05-16
Abstract
Abstract A cylinder head for internal combustion engines, especially Diesel engines, with at least one opening for a passage forming an inlet or outlet and leading to a combustion chamber. This opening which is adapted to be closed and opened by a valve is on that side thereof which faces in the direction toward the combustion chamber, provided with a valve seat ring fastened in the opening of the passage. Each valve seat ring is to its major extent conical with the basis of the cone pointing toward the combustion chamber while only that end of the valve seat ring which faces away from the combustion chamber is in a projecting manner fastened to the cylinder head.
Inventors
- 👤 Ludwig Elsbett
- 👤 Gunter Elsbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:23
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4264; F01; F01L; F01L3/00; F01L3/22; F02F1/4285; F02B; F02B2275/00; F02B2275/22; F02B3/00; F02B3/06; F02F2001/244; F02F2001/247; F02F2001/248
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A cylinder head for internal combustion engines, especially Diesel engines, which includes wall means defining passage means and a mouth section therefor for communicaton with a combustion chamber, said mouth section comprising an inner portion and an outer portion and a conical surface flaring outwardly from said inner portion to said outer portion, and valve seating ring means having an outer peripheral surface substantially parallel to and adjacent said conical surface, while projecting over the latter, said valve seating ring means being connected to said inner portion only of said mouth section and having its inner peripheral surface provided with a predominantly conically formed valve seating area, the remaining part of said valve seating ring means being slidably expandable along said conical surface of said mouth section during thermal expansion of said valve seating ring means in a direction toward the combustion chamber free of any fastening whatever on the cylinder head.
Claim 2
Dependent Claim
152 words
A cylinder head for internal combustion engines, especially Diesel engines, which includes wall means defining passage means and a mouth section therefor for communicaton with a combustion chamber, said mouth section comprising an inner portion and an outer portion and a conical surface flaring outwardly from said inner portion to said outer portion, and valve seating ring means having an outer peripheral surface substantially parallel to and adjacent said conical surface, while projecting over the latter, said valve seating ring means being connected to said inner portion only of said mouth section and having its inner peripheral surface provided with a predominantly conically formed valve seating area, the remaining part of said valve seating ring means being slidably expandable along said conical surface of said mouth section during thermal expansion of said valve seating ring means in a direction toward the combustion chamber free of any fastening whatever on the cylinder head.
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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) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |