US4149512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine having a noise deadening shroud
Assignee: Motorenfabrik Hatz GmbH and Co KG
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Filing: 1976-08-09
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Granted: 1979-04-17
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Expires: 1996-08-09
Abstract
Abstract An internal combustion engine having a sound-deadening shroud surrounding the engine block and connected to latter with the interposition of anti-vibration means. An exhaust plant through which combustion gases are connected is arranged external of the shroud and connected to the engine block. A separate enclosure is secured to the shroud and encloses the exhaust plant leaving a small air gap on all sides between the exhaust plant and the enclosure with only the exhaust pipe of the exhaust plant projecting from the enclosure through an opening.
Inventors
- 👤 Ernst Hatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:07
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/11; F02B77/13; B; B60; B60K; B60K13/00; B60K13/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
The combination of an internal combustion engine having a sound-deadening shroud surrounding an engine block and connected to said engine block with the interposition of anti-vibration means, an exhaust silencer having an exhaust pipe for combustion gases arranged external of said shroud and connected to said engine block, an enclosure defining a chamber therein separate from the interior of said shroud and enclosing said exhaust silencer, said enclosure being secured to said shroud and having means defining an opening therein, said exhaust silencer being smaller in size than said chamber to define a small air gap between said exhaust silencer and said enclosure with said exhaust pipe projecting from said enclosure through said opening.
Claim 2
Dependent Claim
114 words
The combination of an internal combustion engine having a sound-deadening shroud surrounding an engine block and connected to said engine block with the interposition of anti-vibration means, an exhaust silencer having an exhaust pipe for combustion gases arranged external of said shroud and connected to said engine block, an enclosure defining a chamber therein separate from the interior of said shroud and enclosing said exhaust silencer, said enclosure being secured to said shroud and having means defining an opening therein, said exhaust silencer being smaller in size than said chamber to define a small air gap between said exhaust silencer and said enclosure with said exhaust pipe projecting from said enclosure through said opening.
Claim 3
Dependent Claim
16 words
An internal combustion engine according to claim 1, wherein said enclosure is made of sheet metal.
References Cited (Backward Citations)
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US3684053A
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US3866580A
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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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |