US3884209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inlet port for internal combustion engines
Assignee: Individual
•
Filing: 1973-07-18
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Granted: 1975-05-20
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Expires: 1993-07-18
Abstract
Abstract A cylinder head structure for internal combustion engines, comprising at least one inlet valve having a valve stem, a valve seat for the valve, an inlet duct having an elongated feed portion extending from an inlet opening of the cylinder head to a chamber formed in the inlet duct above and in proximity to the inlet valve and surrounding the valve stem, a rib protruding into the chamber, the rib extending from the wall of the chamber in the direction of the valve stem and being bent into an end portion thereof which protrudes into the feed portion of the inlet duct, the end portion dividing the cross-section of the inlet duct into two parts.
Inventors
- 👤 Hans List
- 👤 Josef Affenzeller
- 👤 Karl Kirchweger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:54
CPC Classifications
F; F02; F02B; F02B33/00; F02B33/02; F01; F01L; F01L3/00; F01L3/06; F02B31/00; F02B31/02; F02B31/04; F02B31/042; F02B31/06; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4228; F02B2275/00; F02B2275/14; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
206 words
A cylinder head structure for internal combustion engines, especially diesel engines, comprising at least one inlet valve having a valve stem, a valve seat for said inlet valve, an inlet duct having an elongated feed portion extending from an inlet aperture of the cylinder head to a chamber formed by said inlet duct above and in proximity to said inlet valve, said chamber forming a spiral-shaped inlet duct portion wound around said valve stem and extending downward to said valve seat, a valve guide bearing extending into the chamber and encompassing said valve stem, a rib located in said spiral-shaped duct portion and comprising a stationary and a rotatable portion, the stationary portion of said rib extending from a point of the wall of said spiral-shaped duct portion located close to the axis of the associated cylinder as far as said valve stem and said valve guide bearing in a plane including the valve stem axis, a sleeve rotatably arranged on said valve guide bearing and secured against axial displacement, said sleeve carrying the rotatable portion of the rib, protruding into the feed portion of the inlet duct in a plane including the valve stem axis and dividing the cross-section of the inlet duct in two.
Claim 2
Dependent Claim
206 words
A cylinder head structure for internal combustion engines, especially diesel engines, comprising at least one inlet valve having a valve stem, a valve seat for said inlet valve, an inlet duct having an elongated feed portion extending from an inlet aperture of the cylinder head to a chamber formed by said inlet duct above and in proximity to said inlet valve, said chamber forming a spiral-shaped inlet duct portion wound around said valve stem and extending downward to said valve seat, a valve guide bearing extending into the chamber and encompassing said valve stem, a rib located in said spiral-shaped duct portion and comprising a stationary and a rotatable portion, the stationary portion of said rib extending from a point of the wall of said spiral-shaped duct portion located close to the axis of the associated cylinder as far as said valve stem and said valve guide bearing in a plane including the valve stem axis, a sleeve rotatably arranged on said valve guide bearing and secured against axial displacement, said sleeve carrying the rotatable portion of the rib, protruding into the feed portion of the inlet duct in a plane including the valve stem axis and dividing the cross-section of the inlet duct in two.
Claim 3
Dependent Claim
74 words
A cylinder head structure according to claim 1, further comprising a control mechanism drivingly connected with the rotatable rib section and comprising a shaft rotatably supported by the cylinder head and extending through the same, one extremity of said shaft protruding into said spiral-shaped duct portion, a follower arranged at said one extremity of said shaft, a groove provided on the periphery of said sleeve, and said follower engaging the groove of said sleeve.
Claim 4
Dependent Claim
16 words
A cylinder head structure according to claim 2, wherein the follower is designed as a cam.
Claim 5
Dependent Claim
19 words
A cylinder head structure according to claim 1, wherein the rotatable rib portion is cast integral with the sleeve.
Claim 6
Dependent Claim
47 words
A cylinder head structure according to claim 1, wherein an annular groove is provided on the periphery of the valve guide bearing with a radial bore in the sleeve, a bolt being inserted in the radial bore and engaging the annular groove of the valve guide bearing.
Claim 7
Dependent Claim
43 words
A cylinder head structure according to claim 5, wherein the radial bore of the sleeve is designed as a taphole and the bolt screwed into the taphole is provided with a thread for the attachment of the sleeve to the valve guide bearing.
References Cited (Backward Citations)
US2054621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |