Patent US4791897A successfully refreshed from Google Patents.
US4791897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel laminate type cylinder head gasket
Assignee: Ishikawa Gasket Co Ltd
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Filing: 1987-07-06
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Granted: 1988-12-20
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Expires: 2007-07-06
Abstract
Abstract A steel laminate type cylinder head gasket of the invention is installed in an engine having a cylinder block with a cylinder bore, a cylinder head with an auxiliary combustion chamber, and a mouth plate attached to the cylinder head for defining the auxiliary combustion chamber. The gasket comprises a first plate, and at least one second plate situated adjacent to the first plate. The first plate includes at least one curved first bead having a contour corresponding to a part of the mouth plate, and at least one second bead, the second bead intercrossing an outer end of the first bead and extending at least partly along the cylinder bore. The first plate further includes at least two third beads, each extending between the first and second beads so that the outer end of the first bead is located close to the cylinder bore relative to the third bead.
Inventors
- 👤 Tsunekazu Udagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:20
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0818; F16J15/0825; F02; F02F; F02F11/00; F02F11/002; F16J2015/0837; F16J2015/0862
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
243 words
A steel laminate type cylinder head gasket to be installed in an internal combustion engine having a cylinder block with a cylinder bore, a cylinder head with an auxiliary combustion chamber and a mouth plate attached to the cylinder head for defining the auxiliary combustion chamber, said gasket having at least one first sealing area around the cylinder bore and at least one second sealing area adjacent the first sealing area, on which the mouth plate is placed, said second sealing area being defined by a curved outer line corresponding to a part of a contour of the mouth plate and an inner line corresponding to a part of a contour of the cylinder bore, said gasket comprising: a first plate including at least one curved first bead situated outside the second sealing area and adjacent to the curved outer line, said first bead having two outer ends located at the first sealing area adjacent the cylinder bore, at least one second bead, said second bead intercrossing the outer end of the first bead and extending at least partly along the cylinder bore in the first sealing area, and at least two third beads, each third bead extending between the first and second beads so that the outer end of the first bead is located close to the cylinder bore relative to the third bead, and at least one second plate situated adjacent to the first plate to form the steel laminate gasket.
Claim 2
Dependent Claim
243 words
A steel laminate type cylinder head gasket to be installed in an internal combustion engine having a cylinder block with a cylinder bore, a cylinder head with an auxiliary combustion chamber and a mouth plate attached to the cylinder head for defining the auxiliary combustion chamber, said gasket having at least one first sealing area around the cylinder bore and at least one second sealing area adjacent the first sealing area, on which the mouth plate is placed, said second sealing area being defined by a curved outer line corresponding to a part of a contour of the mouth plate and an inner line corresponding to a part of a contour of the cylinder bore, said gasket comprising: a first plate including at least one curved first bead situated outside the second sealing area and adjacent to the curved outer line, said first bead having two outer ends located at the first sealing area adjacent the cylinder bore, at least one second bead, said second bead intercrossing the outer end of the first bead and extending at least partly along the cylinder bore in the first sealing area, and at least two third beads, each third bead extending between the first and second beads so that the outer end of the first bead is located close to the cylinder bore relative to the third bead, and at least one second plate situated adjacent to the first plate to form the steel laminate gasket.
Claim 3
Dependent Claim
85 words
A steel laminate type cylinder head gasket according to claim 1, wherein said first plate further includes a curved fourth bead situated in the second sealing area and adjacent to the curved outer line, said fourth bead having two outer ends located adjacent to the cylinder bore, and a curved fifth bead extending along and adjacent to the cylinder bore in the second sealing area, said fifth bead intercrossing the outer ends of the fourth bead and extending to the second beads to intercross thereto.
Claim 4
Dependent Claim
25 words
A steel laminate type cylinder head gasket according to claim 2, wherein said second bead comprises two beads located adjacent to the second sealing area.
Claim 5
Dependent Claim
48 words
A steel laminate type cylinder head gasket according to claim 3, wherein said first plate further includes at least one sixth bead located in the second sealing area and at a predetermined distance away from the fifth bead, said sixth bead having outer ends intercrossing the fourth bead.
Claim 6
Dependent Claim
56 words
A steel laminate type cylinder head gasket according to claim 1, wherein said first plate includes at least one notch at a portion corresponding to the second sealing area, said gasket further including a sealing material situated in the notch of the first plate so that the second sealing area is sealed by the sealing material.
Claim 7
Dependent Claim
42 words
A steel laminate type cylinder head gasket according to claim 5, wherein said sealing material is a compressed sheet made of a material selected from at least one of a graphite, metal fiber, glass fiber, carbon fiber, asbestos, mica and organic fiber.
Claim 8
Dependent Claim
25 words
A steel laminate type cylinder head gasket according to claim 6, wherein said second bead comprises two beads located adjacent to the second sealing area.
Claim 9
Dependent Claim
27 words
A steel laminate type cylinder head gasket according to claim 6, further comprising a third plate, said first plate being situated between the second and third plates.
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) | 1991-12-20 | 1992-06-20 | 1992-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-20 | 1996-06-20 | 1996-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-20 | 2000-06-20 | 2000-12-20 | $7700.00 | Window Closed / Lapsed |