Patent US4083570A successfully refreshed from Google Patents.
US4083570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket reinforced by slit grommet
Assignee: Ishino Gasket Manufacturing Co Ltd
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Filing: 1976-03-29
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Granted: 1978-04-11
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Expires: 1996-03-29
Abstract
Abstract The gasket has a grommet about its holes and the grommet has a slit in the narrow area between the adjoining or adjacent holes where superior sealing is required. The gasket may have, when necessary, a sheet of a heat resisting material in said area.
Inventors
- 👤 Minoru Sugawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:44
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123; Y; Y10; Y10S; Y10S277/00; Y10S277/935
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
A cylinder head gasket reinforced by a slit grommet for an internal combustion engine having a sheet of a heat resisting material mounted therein, comprising: a gasket base sheet having a plurality of holes and having an area between the adjoining holes cut away; a graphite sheet having a lamellar crystalline structure mounted on said cut-away area between the adjoining holes; and a grommet mounted on the peripheral edges of said holes and to said sheet and having a slit in at least one side of said area between the adjoining holes.
Claim 2
Dependent Claim
92 words
A cylinder head gasket reinforced by a slit grommet for an internal combustion engine having a sheet of a heat resisting material mounted therein, comprising: a gasket base sheet having a plurality of holes and having an area between the adjoining holes cut away; a graphite sheet having a lamellar crystalline structure mounted on said cut-away area between the adjoining holes; and a grommet mounted on the peripheral edges of said holes and to said sheet and having a slit in at least one side of said area between the adjoining holes.
Claim 3
Dependent Claim
28 words
A gasket as set forth in claim 1, wherein said slit provided in the area between the adjoining holes of said grommet consists of one continuous long slit.
Claim 4
Dependent Claim
29 words
A gasket as set forth in claim 1, wherein said slit provided in the area between the adjoining holes of said grommet consists of a series of long slits.
Claim 5
Dependent Claim
38 words
A gasket as set forth in claim 3, wherein said slit provided in the area between the adjoining holes of said grommet consists of a long slit open at the end reaching the outer periphery of said grommet.
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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |