Patent US3909019A successfully refreshed from Google Patents.
US3909019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gaskets
Assignee: Individual
•
Filing: 1973-05-25
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Granted: 1975-09-30
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Expires: 1993-05-25
Abstract
Abstract Gaskets including stacked ribbed and flat sheet metal plates with increased resiliency in a direction at right angle to the gap to be sealed. Ribbed plates having curved ribs on both faces, with ribs on one face of the plate being staggered in relation to the ribs on the other face of the plate. The ribbed plates produced out of composite plates consisting of a spring-steel core coated on both faces with nonferrous outer layers, preferably copper or aluminum, and the ribs etched out of outer layers. In modified structures the ribs are produced either by etching out of a solid spring-steel plate and jacketed with a softer material or by molding upon a flat spring-steel core.
Inventors
- 👤 Toma D Leko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:14
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/08; F16J15/0818; F16J15/0825; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J2015/0837; F16J2015/085; F16J2015/0856
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
100 words
A gasket comprising ribbed metal plates in the form of an opening to be sealed, the ribs on said ribbed metal plates extending curvilinearly along both faces thereof, said ribs on one face being in staggered relation to the ribs on the opposite face, and flat metal plates having no ribs on either face thereof, said ribbed metal plates being stacked in said opening with a different one of said flat metal plates being disposed intermediate each pair them and in contact relationship therewith, and a grommet embracing the peripheral margin of the gasket surrounding said opening to be sealed.
Claim 2
Dependent Claim
100 words
A gasket comprising ribbed metal plates in the form of an opening to be sealed, the ribs on said ribbed metal plates extending curvilinearly along both faces thereof, said ribs on one face being in staggered relation to the ribs on the opposite face, and flat metal plates having no ribs on either face thereof, said ribbed metal plates being stacked in said opening with a different one of said flat metal plates being disposed intermediate each pair them and in contact relationship therewith, and a grommet embracing the peripheral margin of the gasket surrounding said opening to be sealed.
Claim 3
Dependent Claim
109 words
A gasket comprising resilient composite ribbed plates shaped in the form of an opening to be sealed, said composite ribbed plates having a spring-steel core and non-ferrous metal outer layers, the ribs on said composite ribbed plates extending curvilinearly along both faces thereof, said ribs on one face being in staggered relation to the ribs on the opposite face, and flat metal plates having no ribs on either face thereof, said composite ribbed plates being stacked in said opening with a different one of said flat metal plates being disposed intermediate each pair them and in contact relationship therewith, and means for maintaining said plates in said stacked relation.
Claim 4
Dependent Claim
109 words
A gasket comprising resilient composite ribbed plates shaped in the form of an opening to be sealed, said composite ribbed plates having a spring-steel core and non-ferrous metal outer layers, the ribs on said composite ribbed plates extending curvilinearly along both faces thereof, said ribs on one face being in staggered relation to the ribs on the opposite face, and flat metal plates having no ribs on either face thereof, said composite ribbed plates being stacked in said opening with a different one of said flat metal plates being disposed intermediate each pair them and in contact relationship therewith, and means for maintaining said plates in said stacked relation.
Claim 5
Dependent Claim
110 words
A gasket comprising resilient composite ribbed plates shaped in the form of of an opening to be sealed, said composite ribbed plates having a spring-steel core and plastic outer layers, the ribs on said composite ribbed plates extending curvilinearly along both faces thereof, said ribs on one face being in staggered relation to the ribs on the opposite face, and flat metal plates having no ribs on either face thereof, said composite ribbed plates being stacked in said opening with a different one of said flat metal plates being disposed intermediate each pair of them and in contact relationship therewith, and means for maintaining said plates in said stacked relation.
Claim 6
Dependent Claim
110 words
A gasket comprising resilient composite ribbed plates shaped in the form of of an opening to be sealed, said composite ribbed plates having a spring-steel core and plastic outer layers, the ribs on said composite ribbed plates extending curvilinearly along both faces thereof, said ribs on one face being in staggered relation to the ribs on the opposite face, and flat metal plates having no ribs on either face thereof, said composite ribbed plates being stacked in said opening with a different one of said flat metal plates being disposed intermediate each pair of them and in contact relationship therewith, and means for maintaining said plates in said stacked relation.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |