US4448156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable gas distribution device for internal combustion motors
Assignee: Renault SA
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Filing: 1981-10-29
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Granted: 1984-05-15
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Expires: 2001-10-29
Abstract
Abstract A variable gas distribution device, or a variable valve timing device, for an internal combustion engine is disclosed. The device consists of at least two rocker arms mounted on a common shaft and each engageable with a cam having a different configuration. A connecting element is slidably mounted on the shaft between two of the rocker arms and is engageable with an intake valve of an engine. The connecting element and rocker arms have lateral notches which are matable with one another so that the connecting element rotates with one or the other of the rocker arms. A control device is provided for moving the connecting element along the axis of the shaft so that it can engage with one or the other of the rocker arms.
Inventors
- 👤 Claude Henault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:51
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/26; F01L1/267; F01L1/12; F01L1/18; F01L1/181
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
A variable valve timing device for an internal combustion engine, comprising: at least two rocker arms mounted on a common rocker arm shaft; two cams, each of said cams being engageable with one of said rocker arms for rotating said rocker arm about said shaft, each said cam having a different configuration; a connecting element slidably mounted on said shaft between two of said rocker arms, said connecting element including a first portion and a second portion; control means engageable with said first portion for moving each said connecting element along the axis of said shaft; an engine cylinder valve engageable with said second portion for actuating said valve when said connecting element is rotated; and coupling means associated with said rocker arms and said connecting element for rotatably coupling said connecting element to one of said rocker arms.
Claim 2
Dependent Claim
139 words
A variable valve timing device for an internal combustion engine, comprising: at least two rocker arms mounted on a common rocker arm shaft; two cams, each of said cams being engageable with one of said rocker arms for rotating said rocker arm about said shaft, each said cam having a different configuration; a connecting element slidably mounted on said shaft between two of said rocker arms, said connecting element including a first portion and a second portion; control means engageable with said first portion for moving each said connecting element along the axis of said shaft; an engine cylinder valve engageable with said second portion for actuating said valve when said connecting element is rotated; and coupling means associated with said rocker arms and said connecting element for rotatably coupling said connecting element to one of said rocker arms.
Claim 3
Dependent Claim
24 words
The device of claim 1 wherein said coupling means comprises mating notched structure on the axial ends of said rocker arms and connecting element.
Claim 4
Dependent Claim
12 words
The device of claim 1 wherein said control means are activated mechanically.
Claim 5
Dependent Claim
12 words
The device of claim 1 wherein said control means are activated hydraulically.
Claim 6
Dependent Claim
12 words
The device of claim 1 wherein said control means are activated electrically.
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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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |