Patent US3653368A successfully refreshed from Google Patents.
US3653368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve chamber for the inlet valve of a four-cycle internal combustion engine
Assignee: Daimler Benz AG
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Filing: 1969-12-12
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Granted: 1972-04-04
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Expires: 1989-12-12
Abstract
Abstract A valve chamber for the inlet valve of a four-cycle internal combustion engine in which the valve chamber is provided with at least one detaching step in proximity to the valve seat which forms a sharp edge pointing in the direction of the flow of the air to facilitate detachment of fuel precipitated along the walls.
Inventors
- 👤 Hans O Scherenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:01
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4235; F01; F01L; F01L3/00; F01L3/22; F02F1/4264; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02F2001/244; F02F2001/247
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
63 words
A valve chamber formed about a valve stem of a suspended inlet valve of a four-cycle internal combustion engine, characterized in that at least one detaching step means is provided in the valve chamber in proximity to the valve seat, which is substantially concentric to the valve stem and forms within said valve chamber a sharp edge pointing substantially in the flow direction.
Claim 2
Dependent Claim
63 words
A valve chamber formed about a valve stem of a suspended inlet valve of a four-cycle internal combustion engine, characterized in that at least one detaching step means is provided in the valve chamber in proximity to the valve seat, which is substantially concentric to the valve stem and forms within said valve chamber a sharp edge pointing substantially in the flow direction.
Claim 3
Dependent Claim
55 words
A valve chamber according to claim 1, characterized in that the detaching step means is undercut by an angle of about 45* and that the diameter of the valve chamber downstream of the detaching step means is larger by about 5 percent than the diameter of the valve chamber upstream of the detaching step means.
Claim 4
Dependent Claim
27 words
A valve chamber according to claim 2, with an inserted valve seat ring, characteRized in that the detaching step means is arranged at the valve seat ring.
Claim 5
Dependent Claim
26 words
A valve chamber according to claim 3, characterized in that the detaching step means is arranged at about half the height of the valve seat ring.
Claim 6
Dependent Claim
22 words
A valve chamber according to claim 4, characterized in that several detaching step means are arranged in series in the valve chamber.
Claim 7
Dependent Claim
27 words
A valve chamber according to claim 1, with an inserted valve seat ring, characterized in that the detaching step means is arranged at the valve seat ring.
Claim 8
Dependent Claim
26 words
A valve chamber according to claim 6, characterized in that the detaching step means is arranged at about half the height of the valve seat ring.
Claim 9
Dependent Claim
22 words
A valve chamber according to claim 1, characterized in that several detaching step means are arranged in series in the valve chamber.
Claim 10
Dependent Claim
26 words
A valve chamber according to claim 1, characterized in that the detaching step means is arranged at about half the height of the valve seat ring.
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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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |