Patent US3685399A successfully refreshed from Google Patents.
US3685399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston internal combustion engine with cylinder liner secured directly at the cylinder head
Assignee: Daimler Benz AG
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Filing: 1970-04-20
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Granted: 1972-08-22
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Expires: 1990-04-20
Abstract
Abstract A piston internal combustion engine with a cylinder liner secured directly at the cylinder head by means of a mounting collar engaging in an annular groove of the cylinder head; the collar is adjoined externally and internally by annular sealing surfaces provided at the liner end face; the inner flank of the collar serves the purpose of centering the liner while the outer flank thereof serves the purpose of fastening the liner in the cylinder head.
Inventors
- 👤 Manfred Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:03
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/02; F02F1/10; F02F1/16; F02F11/00; F02F11/005
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
179 words
A piston internal combustion engine comprising: a cylinder head, a cylinder liner, and connecting means including an annular collar on an end face of said liner engaging in a corresponding annular groove in said head, said liner having inner and outer annularly shaped sealing surfaces positioned respectively inside and outside of said collar, said head having inner and outer annularly shaped sealing surfaces positioned respectively inside and outside of said groove such that said sealing surfaces on said head engage with the corresponding sealing surfaces on said liner for sealing the groove and collar connecting means from all engine fluids and gases, an inner flank of said collar engaging a corresponding wall of said groove for centering the cylinder liner with respect to said head, an outer flank of said collar including fastening means for forming the connecting means with respect to corresponding fastening means provided on a corresponding wall of said groove, the arrangement of said fastening means on the outer flank of said collar effectively insulating said connecting means from the thermal stresses inside of said liner.
Claim 2
Dependent Claim
179 words
A piston internal combustion engine comprising: a cylinder head, a cylinder liner, and connecting means including an annular collar on an end face of said liner engaging in a corresponding annular groove in said head, said liner having inner and outer annularly shaped sealing surfaces positioned respectively inside and outside of said collar, said head having inner and outer annularly shaped sealing surfaces positioned respectively inside and outside of said groove such that said sealing surfaces on said head engage with the corresponding sealing surfaces on said liner for sealing the groove and collar connecting means from all engine fluids and gases, an inner flank of said collar engaging a corresponding wall of said groove for centering the cylinder liner with respect to said head, an outer flank of said collar including fastening means for forming the connecting means with respect to corresponding fastening means provided on a corresponding wall of said groove, the arrangement of said fastening means on the outer flank of said collar effectively insulating said connecting means from the thermal stresses inside of said liner.
Claim 3
Dependent Claim
19 words
A piston internal combustion engine according to claim 1, characterized in that said collar has an approximately square cross-section.
Claim 4
Dependent Claim
25 words
A piston internal combustion engine according to claim 2, characterized in that the cylinder liner is connected at the cylinder head by a threaded connection.
Claim 5
Dependent Claim
25 words
A piston internal combustion engine according to claim 2, characterized in that the cylinder liner is secured at the cylinder head by a shrink fit.
Claim 6
Dependent Claim
36 words
A piston internal combustion engine according to claim 1, characterized in that the inner surface of the annular groove of the cylinder head and the inner flank of said collar are constructed as complementary seating surfaces.
Claim 7
Dependent Claim
37 words
A piston internal combustion engine according to claim 5, characterized in that the outer surface of the annular groove in the cylinder head and the outer flank of said collar are constructed as complementary mutually engaging surfaces.
Claim 8
Dependent Claim
21 words
A piston internal combustion engine according to claim 6, characterized in that said last-mentioned mutually engaging surfaces form a threaded connection.
Claim 9
Dependent Claim
21 words
A piston internal combustion engine according to claim 6, characterized in that said last-mentioned mutually engaging surfaces form a shrink fit.
Claim 10
Dependent Claim
19 words
A piston internal combustion engine according to claim 6, characterized in that said collar has an approximately square cross-section.
Claim 11
Dependent Claim
25 words
A piston internal combustion engine according to claim 1, characterized in that the cylinder liner is connected at the cylinder head by a threaded connection.
Claim 12
Dependent Claim
25 words
A piston internal combustion engine according to claim 1, characterized in that the cylinder liner is secured at the cylinder head by a shrink fit.
Claim 13
Dependent Claim
37 words
A piston internal combustion engine according to claim 1, characterized in that the outer surface of the annular groove in the cylinder head and the outer flank of said collar are constructed as complementary mutually engaging surfaces.
Claim 14
Dependent Claim
20 words
A piston internal combustion engine according to claim 12, characterized in that said mutually engaging surfaces form a threaded connection.
Claim 15
Dependent Claim
20 words
A piston internal combustion engine according to claim 12, characterized in that said mutually engaging surfaces form a shrink fit.
Claim 16
Dependent Claim
40 words
A piston internal combustion engine according to claim 7, characterized in that a groove is provided in a lower portion of the outer flank of said collar, said groove forming an interruption in the thread means on said collar means.
Claim 17
Dependent Claim
36 words
A piston internal combustion engine according to claim 7, characterized in that said mounting collar extends upwardly with respect to both of said sealing surface means, an amount less than the depth of said annular groove.
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |