US3796280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine with sound-proofing casing
Assignee: LIST H OE
•
Filing: 1972-09-01
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Granted: 1974-03-12
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Expires: 1992-09-01
Abstract
Abstract An internal combustion engine having a sound-proofing casing comprising at least one spaced bottom portion raised sump-fashion and surrounding the engine and attached to the latter by means of sound-proofing supporting members attached to the engine in its bottom-most area, the spaced bottom portion of the casing being closed on top by means of a cover.
Inventors
- 👤 G Thien
- 👤 H Fachbach
- 👤 O Skatsche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:07
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/11; F02B77/13
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
184 words
An internal combustion engine with a sound-proofing casing arranged in spaced relation to the outer surfaces of the engine and connected to the engine in such a manner as to absorb sound conducted through solids, said casing comprising a troughlike lower casing portion having a bottom and sidewalls, one of the sidewalls having a self-contained aperture for the passage of a crankshaft, an upper casing portion arranged upon said troughlike lower casing portion and rigidly attached to same, a cover placed upon said upper casing portion and closing the casing, at least two sound-proofing supporting members mounted on the said troughlike lower casing portion which is attached to the cylinder block by means of said sound-proofing supporting members, a cavity defined by the casing and the outer surfaces of the engine, two chambers sealed off against each other within said cavity, the first of said chambers being enclosed by said troughlike lower casing portion and oil-wetted, the second of said chambers being surrounded by said upper casing portion and kept free from oil and auxiliary machines arranged on the engine within said second chamber.
Claim 2
Dependent Claim
184 words
An internal combustion engine with a sound-proofing casing arranged in spaced relation to the outer surfaces of the engine and connected to the engine in such a manner as to absorb sound conducted through solids, said casing comprising a troughlike lower casing portion having a bottom and sidewalls, one of the sidewalls having a self-contained aperture for the passage of a crankshaft, an upper casing portion arranged upon said troughlike lower casing portion and rigidly attached to same, a cover placed upon said upper casing portion and closing the casing, at least two sound-proofing supporting members mounted on the said troughlike lower casing portion which is attached to the cylinder block by means of said sound-proofing supporting members, a cavity defined by the casing and the outer surfaces of the engine, two chambers sealed off against each other within said cavity, the first of said chambers being enclosed by said troughlike lower casing portion and oil-wetted, the second of said chambers being surrounded by said upper casing portion and kept free from oil and auxiliary machines arranged on the engine within said second chamber.
Claim 3
Dependent Claim
35 words
An internal combustion engine as in claim 1, wherein said bottom portion terminates approximately on the same level as the upper edge of the cylinder head, with the directly adjoining said cover being essentially flat.
Claim 4
Dependent Claim
28 words
An internal combustion engine as in claim 1, wherein said bottom portion of the casing and said upper portion of the casing each are made of one piece.
Claim 5
Dependent Claim
27 words
An internal combustion engine as in claim 6, wherein said bottom portion of the casing and said upper portion of the casing are made of synthetic material.
Claim 6
Dependent Claim
31 words
An internal combustion engine as in claim 1, wherein said bottom portion of the casing comprises a number of structural elements interconnected inseparably and in a manner providing an oiltight seal.
Claim 7
Dependent Claim
17 words
An internal combustion engine as in claim 5, wherein said structural elements are tightly interconnected by welding.
References Cited (Backward Citations)
US3601101A
Cited
US3684053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |