Patent US3933142A successfully refreshed from Google Patents.
US3933142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine, particularly a diesel engine
Assignee: Individual
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Filing: 1974-06-05
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Granted: 1976-01-20
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Expires: 1994-06-05
Abstract
Abstract An internal combustion engine, in particular a Diesel engine, comprising at least one inlet duct consisting of a delivery portion and an adjoining duct portion wound spiral-fashion around the shaft of the associated intake valve, the upper wall of which bulges downwardly at the point of transition from the delivery portion to the spiral-shaped duct portion in such a manner that the cross-sectional area of the inlet duct is reduced above the valve diameter extending at a right angle in relation to the axis of the delivery portion.
Inventors
- 👤 Hans List
- 👤 Rainer Cichocki
- 👤 Karl Kirchweger
- 👤 Friedrich Steinwandter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:38
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4228; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
An internal combustion eninge, in particular a Diesel engine, comprising at least one inlet valve for each cylinder, arranged in eccentric relation to the cylinder axis, an inlet duct connected to said inlet valve and comprising a delivery portion and an adjoining spiral-shaped duct portion, said inlet valve having a valve stem extending through the spiral-shaped duct portion, said inlet duct having a reduction of the cross-sectional area formed by a portion of an upper duct wall comprising a stepped portion or rib protruding into the inlet duct at the point of transition from the delivery portion to the spiralshaped duct portion and extending in transverse relation to the direction of the delivery portion.
Claim 2
Dependent Claim
114 words
An internal combustion eninge, in particular a Diesel engine, comprising at least one inlet valve for each cylinder, arranged in eccentric relation to the cylinder axis, an inlet duct connected to said inlet valve and comprising a delivery portion and an adjoining spiral-shaped duct portion, said inlet valve having a valve stem extending through the spiral-shaped duct portion, said inlet duct having a reduction of the cross-sectional area formed by a portion of an upper duct wall comprising a stepped portion or rib protruding into the inlet duct at the point of transition from the delivery portion to the spiralshaped duct portion and extending in transverse relation to the direction of the delivery portion.
Claim 3
Dependent Claim
73 words
An internal combustion engine according to claim 1, wherein the stepped portion comprises a first upper duct wall portion extending from the delivery portion to the point of transition to the spiral-shaped duct portion and sloping off towards the inlet valve with an increasing curvature, and a second upper duct wall portion adjacent the first upper duct wall portion and extending approximately in a perpendicular relation to the axis of the inlet valve.
Claim 4
Dependent Claim
72 words
An internal combustion engine according to claim 1, wherein said stepped portion comprises a first upper duct wall portion extending from the delivery portion to the point of transition to the spiral-shaped duct portion and sloping off towards the inlet valve with an increasing curvature, and a second upper duct wall portion adjacent the first upper duct wall portion and extending in an inclined relation to the plane of the valve seat.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |