US4977869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve assembly for internal-combustion engines
Assignee: Elf Antar France
•
Filing: 1990-02-12
•
Granted: 1990-12-18
•
Expires: 2010-02-12
Abstract
Abstract Valve assembly (22) intended for closing a combustion chamber (14) of an internal-combustion engine and comprising a valve (36) and a valve seat (42), the valve lifting off from its seat in order to open the combustion chamber (14) by moving away from the latter. According to the invention, the valve seat (42) is designed to move relative to the combustion chamber (14) under the effect of the pressure prevailing in this chamber and thereby to reinforce the closing of the valve assembly.
Inventors
- 👤 Jean-Claude Fayard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:19
CPC Classifications
F; F01; F01L; F01L3/00; F01L3/22; F01L3/20; F01L2003/25; F01L2003/258
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
82 words
Valve assembly (22) intended for closing a combustion chamber (14) of an internal-combustion engine and comprising a valve (36) and a valve seat (42), the valve lifting off from its seat in order to open the combustion chamber (14) by moving away from the latter, characterized in that the valve seat (42) is designed to move relative to the combustion chamber (14) under the effect of the pressure prevailing in this chamber and thereby to reinforce the closing of the valve assembly
Claim 2
Dependent Claim
82 words
Valve assembly (22) intended for closing a combustion chamber (14) of an internal-combustion engine and comprising a valve (36) and a valve seat (42), the valve lifting off from its seat in order to open the combustion chamber (14) by moving away from the latter, characterized in that the valve seat (42) is designed to move relative to the combustion chamber (14) under the effect of the pressure prevailing in this chamber and thereby to reinforce the closing of the valve assembly
Claim 3
Dependent Claim
27 words
Valve assembly according to claim 1, characterized in that the seat (42) is substantially annular and is mounted sealingly slidably in a bore (48) in the engine.
Claim 4
Dependent Claim
28 words
Valve assembly according to claim 2, characterized in that the seat (42) has means (50, 52, 58) for ensuring sealing between the seat (42) and the bore (48).
Claim 5
Dependent Claim
42 words
Valve assembly according to claim 3, characterized in that the means for ensuring sealing comprise two O-ring gaskets (50, 52) arranged on the periphery of the seat (42) and defining between them an annular space (98) designed to receive a cooling fluid.
Claim 6
Dependent Claim
34 words
Valve assembly according to one of claims 1 to 4, characterized in that the seat (42) has a chamfered surface intended for interacting sealingly with a corresponding surface (46) formed on the valve (36).
Claim 7
Dependent Claim
36 words
Valve assembly according to claim 1, characterized in that the seat (42) is mounted sealingly in a bore (48) made in the engine and is connected to this bore by means of a flexible element (100).
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) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |