Patent US4635592A successfully refreshed from Google Patents.
US4635592A
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Valve control for an internal combustion engine
Assignee: WEICHSLER HERMANN ROSENTALER STRASSE 218 A-9020 KLAGENFURT AUSTRIA
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Filing: 1985-03-07
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Granted: 1987-01-13
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Expires: 2005-03-07
Abstract
Abstract In an internal combustion engine with a cylinder (1), the cylinder head (2) has four valves (3, 4) inclined towards each other and arranged to be radially aligned with respect to the combustion chamber, pairs of the valves being operable by a common camshaft (6) by means of conical cams (7). To make it possible to use such a valve control for high rotational speeds, too, bucket type tappets (8) are displaceably mounted between the radially aligned valves (3, 4) and the conical cams (7) in the cylinder head (2).
Inventors
- 👤 Hermann Weichsler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:22
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/26; F01L1/262; F01L1/20; F01L1/205; F01L1/22; F01L1/24; F01L13/00; F01L13/0015; F01L13/0036; F01L13/0042; F01L1/02; F01L1/04; F01L1/047; F01L1/053; F01L1/0532; F01L1/08; F01L3/00; F01L2003/25; F01L2003/256; F02; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/18; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02F2001/244; F02F2001/245; F02F2001/246
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
Valve control for an internal combustion engine with at least one cylinder whose cylinder head has at least one pair of valves inclined towards each other and arranged to be radially aligned with respect to the combustion chamber, the valves being operable by a common camshaft by means of conical cams, wherein the improvement comprises bucket type tappets displaceably mounted in the cylinder head between the radially aligned valves and the conically shaped cams.
Claim 2
Dependent Claim
74 words
Valve control for an internal combustion engine with at least one cylinder whose cylinder head has at least one pair of valves inclined towards each other and arranged to be radially aligned with respect to the combustion chamber, the valves being operable by a common camshaft by means of conical cams, wherein the improvement comprises bucket type tappets displaceably mounted in the cylinder head between the radially aligned valves and the conically shaped cams.
Claim 3
Dependent Claim
39 words
Valve control according to claim 1, wherein the conical cams, in the rotational position for the maximal lifting stroke, are bent in the lifting stroke range from a plane perpendicular to the axis towards the associated bucket type tappet.
Claim 4
Dependent Claim
13 words
Valve control according to claim 1, wherein the conical cams are axially displaceable.
Claim 5
Dependent Claim
16 words
Valve control according to claim 3, wherein the cams are axially displaceably mounted on the camshaft.
Claim 6
Dependent Claim
23 words
Valve control according to claim 3, wherein the camshaft is divided into shaft sections each carrying a single cam and individually axially displaceable.
Claim 7
Dependent Claim
16 words
Valve control according to claim 5, wherein the shaft sections of the camshaft are hydraulically displaceable.
Claim 8
Dependent Claim
31 words
Valve control according to claim 6, wherein the hydraulic actuation of the shaft sections is effected in the direction of a reduction of the valve clearance by a respective check valve.
Claim 9
Dependent Claim
41 words
Valve control according to claim 1, wherein a flow channel for a cooling medium is provided between the two camshafts in an arrangement of four radially arranged valves each pair of which has a common camshaft with conical cams associated therewith.
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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) | 1990-01-12 | 1990-07-14 | 1991-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-12 | 1994-07-14 | 1995-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-12 | 1998-07-14 | 1999-01-13 | $7700.00 | Window Closed / Lapsed |