US4243231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasket reinforced by grommet in combination with graphite sheet
Assignee: Ishino Gasket Manufacturing Co Ltd
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Filing: 1979-08-10
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Granted: 1981-01-06
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Expires: 1999-08-10
Abstract
Abstract A gasket providing superior sealing having a grommet inserted in its holes and a graphite sheet mounted in the narrow area between the two adjoining or adjacent holes is disclosed.
Inventors
- 👤 Minoru Sugawara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:27
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
66 words
A gasket reinforced by grommet in combination with a graphite sheet, comprising: a gasket base sheet with a plurality of holes and having the area between adjoining holes cut out; a graphite sheet mounted in said cut out area between the adjoining holes and having a lamellar crystalline structure; and a grommet mounted on the peripheral edge of said holes and attached to said graphite sheet.
Claim 2
Dependent Claim
66 words
A gasket reinforced by grommet in combination with a graphite sheet, comprising: a gasket base sheet with a plurality of holes and having the area between adjoining holes cut out; a graphite sheet mounted in said cut out area between the adjoining holes and having a lamellar crystalline structure; and a grommet mounted on the peripheral edge of said holes and attached to said graphite sheet.
Claim 3
Dependent Claim
18 words
A gasket as set forth in claim 1, wherein said graphite sheet is entirely embedded in said grommet.
Claim 4
Dependent Claim
20 words
A gasket as set forth in claim 1, wherein said graphite sheet is mounted protruding in part beyond the grommet.
Claim 5
Dependent Claim
32 words
A gasket as set forth in claim 1, wherein said grommet is cut off in part so that part of said graphite sheet is exposed in said area between the adjoining holes.
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) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |