Patent US4524979A successfully refreshed from Google Patents.
US4524979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder head gasket for internal combustion engines
Assignee: Audi AG
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Filing: 1984-06-14
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Granted: 1985-06-25
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Expires: 2004-06-14
Abstract
Abstract A cylinder head gasket for internal combustion engines is fixed in position in the cylinder block and/or the cylinder head. Elements fixedly connected with the gasket are shaped that they are adapted to coact with bores in the cylinder block and/or the cylinder head in a frictionally connected manner. The elements are bushings which penetrate the gasket and protrude therefrom at least on one side thereof. The bushings have flanges engaging on both sides of the gasket and adapted to extend into the bores in a radial direction and in a flexible manner.
Inventors
- 👤 Armin Bauder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:49
CPC Classifications
F; F02; F02F; F02F11/00; F02F11/002; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0818; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
87 words
A cylinder head gasket for disposition between a cylinder head and a cylinder block of an internal combustion engine, said cylinder head and block having corresponding cylinder bores, coolant bores for a liquid coolant, and one of said cylinder head and cylinder block having gasket bores, said gasket comprising: a plate with openings corresponding to said cylinder and coolant bores; and elements corresponding to said gasket bores, said elements being affixed to said plate and being shaped to frictionally engage said gasket bores thereby positioning said gasket.
Claim 2
Dependent Claim
87 words
A cylinder head gasket for disposition between a cylinder head and a cylinder block of an internal combustion engine, said cylinder head and block having corresponding cylinder bores, coolant bores for a liquid coolant, and one of said cylinder head and cylinder block having gasket bores, said gasket comprising: a plate with openings corresponding to said cylinder and coolant bores; and elements corresponding to said gasket bores, said elements being affixed to said plate and being shaped to frictionally engage said gasket bores thereby positioning said gasket.
Claim 3
Dependent Claim
55 words
A cylinder head gasket in accordance with claim 1, in which the elements are bushings which penetrate the gasket and protrude therefrom at least on one side thereof, the bushings having flanges engaging on both sides of the gasket and adapted to extend into the gasket bores said bushings being flexible in the radial direction.
Claim 4
Dependent Claim
26 words
A cylinder head gasket in accordance with claim 2, in which the bushings are provided with at least one longitudinal slot extending into the gasket bores.
Claim 5
Dependent Claim
32 words
A cylinder head gasket in accordance with claim 2, in which the bushing is provided with at least three projections which are adapted to yield in a radial direction with the bore.
Claim 6
Dependent Claim
14 words
A cylinder head gasket in accordance with claim 3 wherein said bushings are hollow.
Claim 7
Dependent Claim
25 words
A cylinder head gasket in accordance with claim 1, in which the elements are provided with radial protruding ribs extending on the outer face thereof.
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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |