Patent US4330585A successfully refreshed from Google Patents.
US4330585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder-head gasket and method of making same
Assignee: Solyem SAS
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Filing: 1980-10-30
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Granted: 1982-05-18
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Expires: 2000-10-30
Abstract
Abstract A cylinder-head gasket has an elongated compressible heat-resistant sheet having a longitudinally extending succession of circular cylinder holes. Respective U-section sheet-metal rings are gripped over the edges of these holes on the sheet. Respective sections of reinforcement material are engaged between these rings and the sheet in a longitudinally extending central region of the sheet that has a width smaller than the diameter of the cylinder holes. The reinforcement material is different from the sheet metal of the rings and is heat resistant.
Inventors
- 👤 Pierre Eyrard
- 👤 Jean-Paul Poquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:32
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/122; F16J15/123; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1057; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
81 words
A cylinder-head gasket comprising: an elongated compressible heat-resistant sheet having a longitudinally extending succession of circular cylinder holes having edges; respective U-section sheet-metal rings gripped over said edges of said holes of said sheet; and respective sections of reinforcement material engaged between said rings and said sheet in a longitudinally extending central region of said sheet having a width smaller than the diameter of said cylinder holes, said material being different from the sheet metal of said rings and heat resistant.
Claim 2
Dependent Claim
81 words
A cylinder-head gasket comprising: an elongated compressible heat-resistant sheet having a longitudinally extending succession of circular cylinder holes having edges; respective U-section sheet-metal rings gripped over said edges of said holes of said sheet; and respective sections of reinforcement material engaged between said rings and said sheet in a longitudinally extending central region of said sheet having a width smaller than the diameter of said cylinder holes, said material being different from the sheet metal of said rings and heat resistant.
Claim 3
Dependent Claim
15 words
The gasket defined in claim 1 wherein said material is copper, brass, steel, or aluminum.
Claim 4
Dependent Claim
14 words
The gasket defined in claim 1 wherein said sections are laminated with said sheet.
Claim 5
Dependent Claim
21 words
The gasket defined in claim 1 wherein said material is a foil having a thickness between 0.002 mm and 0.15 mm.
Claim 6
Dependent Claim
19 words
The gasket defined in claim 1 wherein said material is a highly heat-resistant synthetic resin applied to said sections.
Claim 7
Dependent Claim
27 words
The gasket defined in claim 5 wherein said resin is an epoxy resin mixed with silica or barium-sulfate powder with between 50% and 80% by weight epoxy.
Claim 8
Dependent Claim
74 words
In a method of making a cylinder-head gasket wherein U-section sheet-metal rings are gripped over the edges of circular cylinder holes longitudinally aligned down the middle of an elongated compressible heat-resistant sheet, the improvement comprising the step of fitting between said rings and said sheet in a longitudinally extending central region of said sheet having a width smaller than the diameter of said holes heat-resistant material different from the sheet metal of said rings.
Claim 9
Dependent Claim
74 words
In a method of making a cylinder-head gasket wherein U-section sheet-metal rings are gripped over the edges of circular cylinder holes longitudinally aligned down the middle of an elongated compressible heat-resistant sheet, the improvement comprising the step of fitting between said rings and said sheet in a longitudinally extending central region of said sheet having a width smaller than the diameter of said holes heat-resistant material different from the sheet metal of said rings.
Claim 10
Dependent Claim
26 words
The method defined in claim 7 wherein said material is laminated on said sheet metal of said rings prior to gripping of same over said edges.
Claim 11
Dependent Claim
13 words
The method defined in claim 8 wherein said material is heat-resistant epoxy resin.
Claim 12
Dependent Claim
23 words
The method defined in claim 7 wherein said material is laminated on said sheet prior to gripping of said rings over said edges.
Claim 13
Dependent Claim
12 words
The method defined in claim 10 wherein said material is a metal.
Claim 14
Dependent Claim
28 words
The method defined in claim 10 wherein said material is laminated on said sheet and then said holes are punched through said sheet and the material lamina thereon.
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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |