US6129360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-bleed coating for silicone automobile gaskets
Assignee: Wacker Chemical Corp
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Filing: 1997-01-29
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Granted: 2000-10-10
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Expires: 2017-01-29
Abstract
Abstract An oil resistant gasket and method for preparing said oil resistant gasket which comprises applying an organic polymeric coating selected from the group consisting of parylene N, parylene D, parylene C and mixtures thereof; to a porous, elastomeric gasket.
Inventors
- 👤 Francis J. Walker
- 👤 Theodore D. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:49
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/102; B; B60; B60J; B60J10/00; B60J10/15; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; F16J15/104; F16J15/106; C08J2465/00; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/936; Y10S277/944
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
142 words
A method of reducing oil bleeding through an oil permeable internal combustion engine gasket which has an inner surface which is exposed to hot oil, and which is employed to seal joined parts of an internal combustion engine to prevent leakage of hydrocarbon oils at the point of joining, said method comprising forming the internal combustion engine gasket of an oil permeable material and applying a coating of parylene material selected from the group consisting of parylene N, parylene C, parylene D, and mixtures thereof, to at least an outer surface of said oil permeable internal combustion engine gasket to form a parylene-coated internal combustion engine gasket, such that the oil bleeding through said parylene-coated internal combustion engine gasket is less than the oil bleeding through an internal combustion engine gasket which is identical except for the absence of said parylene coating.
Claim 2
Independent Claim
142 words
A method of reducing oil bleeding through an oil permeable internal combustion engine gasket which has an inner surface which is exposed to hot oil, and which is employed to seal joined parts of an internal combustion engine to prevent leakage of hydrocarbon oils at the point of joining, said method comprising forming the internal combustion engine gasket of an oil permeable material and applying a coating of parylene material selected from the group consisting of parylene N, parylene C, parylene D, and mixtures thereof, to at least an outer surface of said oil permeable internal combustion engine gasket to form a parylene-coated internal combustion engine gasket, such that the oil bleeding through said parylene-coated internal combustion engine gasket is less than the oil bleeding through an internal combustion engine gasket which is identical except for the absence of said parylene coating.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said parylene material is also applied to said inner surface of said internal combustion engine gasket.
Claim 4
Dependent Claim
17 words
The method of claim 1, wherein said oil permeable engine gasket comprises a heat cured silicone rubber.
Claim 5
Dependent Claim
12 words
The method of claim 1, wherein said parylene material is parylene C.
Claim 6
Dependent Claim
18 words
The method of claim 1, wherein said parylene coating has a thickness of about 0.0001 inch or more.
Claim 7
Dependent Claim
18 words
The method of claim 1, wherein said parylene coating has a thickness of about 0.0002 inch or more.
Claim 8
Dependent Claim
33 words
The method of claim 2, wherein said parylene coated internal combustion engine gasket exhibits less oil absorbtion as compared to an otherwise identical gasket not having said parylene coating on said inner surface.
Claim 9
Dependent Claim
13 words
The method of claim 1 wherein said engine gasket is a head gasket.
Claim 10
Dependent Claim
14 words
The method of claim 1 wherein said engine gasket is a valve cover gasket.
Claim 11
Dependent Claim
13 words
The method of claim 1 wherein said gasket is an oil pan gasket.
Claim 12
Dependent Claim
110 words
In an internal combustion engine having an oil permeable gasket employed to seal joined parts of said internal combustion engine to prevent leakage of hydrocarbon oils at the point of joining, the gasket having an inner surface exposed to hot oil, the improvement comprising selecting as said gasket a gasket which has at least an outer surface coated with parylene material selected from the group consisting of parylene N, parylene C, parylene D, or a mixture thereof, wherein oil bleeding through said gasket is reduced by said parylene coating as compared to the amount of oil bleeding through an otherwise identical gasket not having said outer surface coated with parylene.
Claim 13
Dependent Claim
110 words
In an internal combustion engine having an oil permeable gasket employed to seal joined parts of said internal combustion engine to prevent leakage of hydrocarbon oils at the point of joining, the gasket having an inner surface exposed to hot oil, the improvement comprising selecting as said gasket a gasket which has at least an outer surface coated with parylene material selected from the group consisting of parylene N, parylene C, parylene D, or a mixture thereof, wherein oil bleeding through said gasket is reduced by said parylene coating as compared to the amount of oil bleeding through an otherwise identical gasket not having said outer surface coated with parylene.
Claim 14
Dependent Claim
26 words
The internal combustion engine of claim 11, wherein said inner surface of said oil permeable gasket is also coated with a coating of said parylene material.
Claim 15
Dependent Claim
29 words
The internal combustion engine of claim 11 wherein the thickness of said parylene coating on said outer surface of said oil permeable gasket is about 0.0001 inch or more.
Claim 16
Dependent Claim
29 words
The internal combustion engine of claim 12 wherein the thickness of said parylene coating on said inner surface of said oil permeable gasket is about 0.0001 inch or more.
Claim 17
Dependent Claim
34 words
The internal combustion engine of claim 12 wherein the parylene coatings of both said outer surface and said inner surface of said oil permeable gasket have a thickness of about 0.0001 inch or more.
Claim 18
Dependent Claim
29 words
The internal combustion engine of claim 11 wherein the thickness of said parylene coating on said outer surface of said oil permeable gasket is about 0.0002 inch or more.
Claim 19
Dependent Claim
29 words
The internal combustion engine of claim 12 wherein the thickness of said parylene coating on said inner surface of said oil permeable gasket is about 0.0002 inch or more.
Claim 20
Dependent Claim
34 words
The internal combustion engine of claim 12 wherein the parylene coatings of both said outer surface and said inner surface of said oil permeable gasket have a thickness of about 0.0002 inch or more.
Claim 21
Dependent Claim
13 words
The method of claim 11 wherein said engine gasket is a head gasket.
Claim 22
Dependent Claim
14 words
The method of claim 11 wherein said engine gasket is a valve cover gasket.
Claim 23
Dependent Claim
13 words
The method of claim 11 wherein said gasket is an oil pan gasket.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-10-10 | 2004-04-10 | 2004-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-10 | 2008-04-10 | 2008-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-10 | 2012-04-10 | 2012-10-10 | $7700.00 | Window Closed / Lapsed |