US3684053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine with sound-absorbing casing
Assignee: Individual
•
Filing: 1970-09-02
•
Granted: 1972-08-15
•
Expires: 1990-09-02
Abstract
Abstract A sound absorbing casing for internal combustion engines in which a first group of casing members are arranged in spaced relation to the engine and directly attached thereto to produce a sound-attenuating effect and a second group of casing members arranged in spaced relation to the engine and removably attached to the casing members of the first group.
Inventors
- 👤 Heinz Fachbach
- 👤 Gerhard Thien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:11
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/11; F02B77/13
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
An internal combustion engine with a sound-absorbing casing, covering the entire surface of the engine in spaced relation to the surface thereof, said engine comprising pipings and other connection means extending through said sound-absorbing casing, the said casing including a first group of casing members directly attached to the engine in such a manner as to produce a sound-attenuating effect, a second group of casing members removably attached to the casing members of the first group in such a manner as to produce a sound-damping effect, said pipings and other engine connection means extending through said casing members of the first group, and said casing members of the second group covering such parts of the engine as have to be accessible for maintenance purposes.
Claim 2
Dependent Claim
124 words
An internal combustion engine with a sound-absorbing casing, covering the entire surface of the engine in spaced relation to the surface thereof, said engine comprising pipings and other connection means extending through said sound-absorbing casing, the said casing including a first group of casing members directly attached to the engine in such a manner as to produce a sound-attenuating effect, a second group of casing members removably attached to the casing members of the first group in such a manner as to produce a sound-damping effect, said pipings and other engine connection means extending through said casing members of the first group, and said casing members of the second group covering such parts of the engine as have to be accessible for maintenance purposes.
Claim 3
Dependent Claim
32 words
An internal combustion engine according to claim 1, comprising auxiliary units located within said sound-absorbing casing attached to the engine, said casing members of the second group covering also said auxiliary unit.
Claim 4
Dependent Claim
62 words
An internal combustion engine according to claim 1, wherein the said pipings extending through openings of said casing members of the first group and said other engine connection means are connected to the engine in such manner as to provide isolation from sound conducted through solids, and the openings through which said pipings and connection means extend being closed by sound-insulating means.
Claim 5
Dependent Claim
62 words
An internal combustion engine according to claim 1, comprising structural engine parts, such as for example, an oil sump attached to the cylinder block in such a manner as to provide isolation from sound conducted through solids, the casing members adjoining said structural engine parts being attached to the last-mentioned engine parts in such a manner as to produce a sound-proofing effect.
Claim 6
Dependent Claim
32 words
An internal combustion engine according to claim 1, comprising a crankshaft extending through the said casing, a sound-absorbing sleeve encompassing the said crankshaft in the area of its passage through the casing.
Claim 7
Dependent Claim
35 words
An internal combustion engine according to claim 1, comprising a fan shaft extending through the said casing, a sound-absorbing sleeve encompassing the said fan shaft in the area of its passage through the said casing.
References Cited (Backward Citations)
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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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |