US3769880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder housing with dry cylinder liners
Assignee: Daimler Benz AG
•
Filing: 1972-02-29
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Granted: 1973-11-06
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Expires: 1992-02-29
Abstract
Abstract A cylinder housing with dry cylinder liners, in particular for internal combustion engines in which the outer surfaces of the cylinder liners taper conically and the cylinder bores also preferably taper conically.
Inventors
- 👤 M Mirjanic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:47
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/004
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
109 words
An arrangement for an internal combustion engine comprising: a cylinder housing having a bore delimited by inwardly facing bore walls, and a cylinder liner having outwardly facing liner wall surfaces, wherein said liner is positioned in said bore, wherein both said bore walls and liner wall surfaces are conically tapered with the angle of inclination of said bore walls with respect to a longitudinally extending central bore axis being different than the angle of inclination of said liner wall surfaces with respect to said bore axis, and wherein said liner is held in position in said bore exclusively by frictional engagement of said bore walls and liner wall surfaces.
Claim 2
Dependent Claim
109 words
An arrangement for an internal combustion engine comprising: a cylinder housing having a bore delimited by inwardly facing bore walls, and a cylinder liner having outwardly facing liner wall surfaces, wherein said liner is positioned in said bore, wherein both said bore walls and liner wall surfaces are conically tapered with the angle of inclination of said bore walls with respect to a longitudinally extending central bore axis being different than the angle of inclination of said liner wall surfaces with respect to said bore axis, and wherein said liner is held in position in said bore exclusively by frictional engagement of said bore walls and liner wall surfaces.
Claim 3
Dependent Claim
27 words
An arrangement according to claim 1, wherein said angle of inclination of said liner wall surfaces is greater than said angle of inclination of said bore walls.
Claim 4
Dependent Claim
32 words
An arrangement according to claim 2, wherein at least one of the liner wall surfaces and bore walls is provided with a thin soft metal layer to compensate for small surface inaccuracies.
Claim 5
Dependent Claim
30 words
An arrangement according to claim 3, wherein the angle of inclination of the liner wall surfaces is lodged between a coNe of approximately 1:50 and a cone of approximately 1:125.
Claim 6
Dependent Claim
38 words
An arrangement according to claim 2, wherein an upper end of said liner has a larger cross-sectional size than an opposite lower end of said liner such that the liner can be inserted from above into said bore.
Claim 7
Dependent Claim
49 words
An arrangement according to claim 5, wherein the relative tapers of the liner wall surfaces and bore walls is such that approximately 90 percent of the liner length can be inserted into the bore before initial frictional engagement between the bore walls and the liner wall surfaces takes place.
Claim 8
Dependent Claim
25 words
An arrangement according to claim 6, wherein the upper end of the liner is flush with the top of the bore in the assembled condition.
Claim 9
Dependent Claim
71 words
An arrangement according to claim 5, wherein the taper of the liner wall surfaces is such that when the liner is completely inserted in the bore, frictional engagement between the liner wall surfaces and the bore walls takes place throughout substantially the entire length of the liner with maximum frictional engagement at the upper end of said liner and housing where maximum thermal stresses are experienced in use on the engine.
Claim 10
Dependent Claim
32 words
An arrangement according to claim 8, wherein at least one of the liner wall surfaces and bore walls is provided with a thin soft metal layer to compensate for small surface inaccuracies.
Claim 11
Dependent Claim
47 words
An arrangement according to claim 9, wherein said soft metal layer is on said liner wall surfaces, and wherein said layer remains intact with the liner during assembly such that the liner can be removed and replaced with a new liner without further preparation of the bore.
Claim 12
Dependent Claim
32 words
An arrangement according to claim 1, wherein the angle of the inclination of the liner wall surfaces is larger than the angle of inclination of the bore walls by approximately 4 minutes.
Claim 13
Dependent Claim
32 words
An arrangement according to claim 7, wherein at least one of the liner wall surfaces and bore walls is provided with a thin soft metal layer to compensate for small surface inaccuracies.
Claim 14
Dependent Claim
34 words
An arrangement according to claim 7, wherein the angle of inclination of the liner wall surfaces is lodged between a cone of approximately 1 : 50 and a cone of approximately 1 : 125.
Claim 15
Dependent Claim
38 words
An arrangement according to claim 1, wherein an upper end of said liner has a larger cross-sectional size than an opposite lower end of said liner such that the liner can be inserted from above into said bore.
Claim 16
Dependent Claim
71 words
An arrangement according to claim 14, wherein the taper of the liner wall surfaces is such that when the liner is completely inserted in the bore, frictional engagement between the liner wall surfaces and the bore walls takes place throughout substantially the entire length of the liner with maximum frictional engagement at the upper end of said liner and housing where maximum thermal stresses are experienced in use on the engine.
Claim 17
Dependent Claim
31 words
An arrangement according to claim 14, wherein the tapering of the liner wall surfaces lies between a cone of about 1 : 50 and a cone of about 1 : 125.
Claim 18
Dependent Claim
55 words
An arrangement according to claim 2, wherein an upper end of said liner has a larger cross-sectional size than an opposite lower end of said liner, and wherein said lower end of said liner is smaller than an upper opening of said bore such that the liner can be inserted from above into the bore.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |