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US4648607A
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US
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Steel laminate gasket with assembly order identification device
Assignee: Ishikawa Gasket Co Ltd
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Filing: 1986-03-04
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Granted: 1987-03-10
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Expires: 2006-03-04
Abstract
Abstract A steel laminate gasket comprises a plurality of thin steel plates to be stacked one after another, and devices for identifying the position of the steel plates formed on the steel plates where no sealing ability is affected. When the steel plates are stacked in the proper order, the devices form a stepped portion with different height relative to a predetermined horizontal plane of the gasket. Consequently, a user can notice the proper order of assembly of the gasket.
Inventors
- 👤 Yoshio Yamada
- 👤 Hidetaka Nakasone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:54
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0818; F16J15/0825; F16J15/0831; F16J2015/0868
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A steel laminate gasket adapted to be situated between two engine parts of an internal combustion engine, comprising a plurality of thin steel plates to be stacked one after another, and means for identifying position of the steel plates formed on the steel plates where sealing ability is not affected, said means, when the steel plates are stacked in a proper order, forming a stepped portion with different height relative to a predetermined horizontal plane of the gasket to thereby allow a user to notice the proper order of assembly of the gasket.
Claim 2
Dependent Claim
93 words
A steel laminate gasket adapted to be situated between two engine parts of an internal combustion engine, comprising a plurality of thin steel plates to be stacked one after another, and means for identifying position of the steel plates formed on the steel plates where sealing ability is not affected, said means, when the steel plates are stacked in a proper order, forming a stepped portion with different height relative to a predetermined horizontal plane of the gasket to thereby allow a user to notice the proper order of assembly of the gasket.
Claim 3
Dependent Claim
35 words
A steel laminate gasket according to claim 1, in which said means for identifying position of the steel plates forms a stepped wall successively diagonally extending relative to a horizontal plane of the steel plates.
Claim 4
Dependent Claim
52 words
A steel laminate gasket according to claim 2, in which said means for identifying position of the steel plates are projections extending horizontally outwardly from the thin steel plates so that even after the gasket is installed in the engine, the order of assembly of the thin steel plates can be checked.
Claim 5
Dependent Claim
31 words
A steel laminate gasket according to claim 2, in which said means for identifying position of the steel plates are notches extending inwardly from outer peripheries of the thin steel plates.
Claim 6
Dependent Claim
26 words
A steel laminate gasket according to claim 2, in which said means for identifying position of the steel plates are holes formed inside the steel plates.
Claim 7
Dependent Claim
29 words
A steel laminate gasket according to claim 1, in which said means for identifying position of the steel plates formed on the steel plates are painted with different colors.
References Cited (Backward Citations)
FR684106A
Cited
US2034610A
Cited
US2089254A
Cited
US2722043A
Cited
US3346265A
Cited
US4157833A
Cited
US4326907A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-09 | 1990-09-08 | 1991-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-09 | 1994-09-08 | 1995-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-09 | 1998-09-08 | 1999-03-10 | $7700.00 | Window Closed / Lapsed |