Patent US3722484A successfully refreshed from Google Patents.
US3722484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for controlling the valves of internal combustion engines
Assignee: Gordini Automobiles SA
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Filing: 1971-01-14
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Granted: 1973-03-27
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Expires: 1991-01-14
Abstract
Abstract A device for controlling the valves of an internal combustion engine having overhead valves comprises a control cam, and two oscillating rockers for each valve. The free end of each rocker is disposed between the cam and the end of the valve stem. The free end of the rocker in contact with the cam has a roller which is in rolling contact with the cam. The lower planar surface of this rocker is in contact with the spherical head portion at the free end of the other rocker. This spherical free end is in in turn in contact with the end or tappet of the valve stem. The rocker in contact with the end of the valve stem oscillates in a plane perpendicular to the axis of the valve. The rocker in contact with the cam oscillates about an axis parallel to the axis of the camshaft. The mid-point of the path of contact between the spherical head portion and the end of the valve stem is disposed substantially along the axis of the valve.
Inventors
- 👤 A Gordini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:33
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/26; F01L1/262; F02; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F01L3/00; F01L2003/25; F01L2003/256; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/18; F02F2001/244; F02F2001/245; F02F2001/246
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
174 words
A device for controlling the valves of an internal combustion engine of the type having overhead camshafts, comprising: a first and second rocker for each valve, each of said rockers being disposed between a control cam on a camshaft and the end portion of the stem of the valve; the free end of said first rocker being in contact with the control cam; oscillating in a plane perpendicular of the axis of this cam and being in contact with a spherical head portion on the second of said rockers, said second rocker being in contact with the end portion of the valve stem and oscillating in a plane containing the axis of the valve, the mid-point of the bearing contact of the spherical head portion on the end portion of the valve stem being disposed substantially along the axis of the valve; and a connecting member for supporting pivots for said rockers is centered on the cylinder head by an opening therein which is substantially coaxial with the spark plug bore of the cylinder.
Claim 2
Independent Claim
174 words
A device for controlling the valves of an internal combustion engine of the type having overhead camshafts, comprising: a first and second rocker for each valve, each of said rockers being disposed between a control cam on a camshaft and the end portion of the stem of the valve; the free end of said first rocker being in contact with the control cam; oscillating in a plane perpendicular of the axis of this cam and being in contact with a spherical head portion on the second of said rockers, said second rocker being in contact with the end portion of the valve stem and oscillating in a plane containing the axis of the valve, the mid-point of the bearing contact of the spherical head portion on the end portion of the valve stem being disposed substantially along the axis of the valve; and a connecting member for supporting pivots for said rockers is centered on the cylinder head by an opening therein which is substantially coaxial with the spark plug bore of the cylinder.
Claim 3
Dependent Claim
32 words
A device according to claim 1, wherein said first and second rockers are fitted on oscillation pins in a common connecting member which is connected to the cylinder head of the engine.
Claim 4
Independent Claim
191 words
A device for controlling the valves of an internal combustion engine of the type having overhead camshafts, comprising: a first and second rocker arm fOr each valve, each rocker mounted for oscillation on a pin at one of its ends, the free ends of said rockers being disposed between a control cam on a camshaft and the end portion of the stem of a valve, the free end of said first rocker having a roller in contact with the control cam, said first rocker being oriented for oscillation in a plane perpendicular of the axis of the control cam, said second rocker comprising a spherical head portion which is in contact with the end portion of the valve stem, and oriented for oscillation in a plane containing the axis of the valve, the bearing contact surface of the spherical head portion with the end of the valve stem being centered on the axis of the valve, and a connecting member for supporting pivots for said rockers, said connecting member being centered on the cylinder head by an opening therein which is substantially coaxial with the spark plug bore of the cylinder.
Claim 5
Independent Claim
191 words
A device for controlling the valves of an internal combustion engine of the type having overhead camshafts, comprising: a first and second rocker arm fOr each valve, each rocker mounted for oscillation on a pin at one of its ends, the free ends of said rockers being disposed between a control cam on a camshaft and the end portion of the stem of a valve, the free end of said first rocker having a roller in contact with the control cam, said first rocker being oriented for oscillation in a plane perpendicular of the axis of the control cam, said second rocker comprising a spherical head portion which is in contact with the end portion of the valve stem, and oriented for oscillation in a plane containing the axis of the valve, the bearing contact surface of the spherical head portion with the end of the valve stem being centered on the axis of the valve, and a connecting member for supporting pivots for said rockers, said connecting member being centered on the cylinder head by an opening therein which is substantially coaxial with the spark plug bore of the cylinder.
Claim 6
Independent Claim
214 words
A device for controlling the valves of an internal combustion engine of the type having overhead camshafts, comprising: a first and second rocker arm for each valve, each rocker mounted for oscillation on a pin at one of its ends, the free ends of said rockers being disposed between a control cam on a camshaft and the end portion of the stem of a valve, the free end of said first rocker having a roller in contact with the control cam and a bearing surface for contacting the second rocker, said bearing surface comprising a plane surface disposed beneath said roller and extending along the axis of the oscillation pin of said first rocker, said first rocker being oriented for oscillation in a plane perpendicular to the axis of the control cam, and said second rocker is oriented for oscillation in a plane containing the axis of the valve, and comprises an integral spherical head portion which is in contact with the end portion of the valve stem and centered on the axis of the valve, and is also in contact with the bearing surface of said first rocker, and control cam, and first rocker being in a plane which substantially passes through the center of said spherical head portion of the second rocker.
Claim 7
Independent Claim
214 words
A device for controlling the valves of an internal combustion engine of the type having overhead camshafts, comprising: a first and second rocker arm for each valve, each rocker mounted for oscillation on a pin at one of its ends, the free ends of said rockers being disposed between a control cam on a camshaft and the end portion of the stem of a valve, the free end of said first rocker having a roller in contact with the control cam and a bearing surface for contacting the second rocker, said bearing surface comprising a plane surface disposed beneath said roller and extending along the axis of the oscillation pin of said first rocker, said first rocker being oriented for oscillation in a plane perpendicular to the axis of the control cam, and said second rocker is oriented for oscillation in a plane containing the axis of the valve, and comprises an integral spherical head portion which is in contact with the end portion of the valve stem and centered on the axis of the valve, and is also in contact with the bearing surface of said first rocker, and control cam, and first rocker being in a plane which substantially passes through the center of said spherical head portion of the second rocker.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |