Spherical annular seal member
US-9212596-B1 · Dec 15, 2015 · US
Discoloration protection
US9303546B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9303546-B2 |
| Application number | US-201414279392-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 16, 2014 |
| Priority date | Jun 19, 2013 |
| Publication date | Apr 5, 2016 |
| Grant date | Apr 5, 2016 |
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- Title
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Abstract
Official abstract text for this publication.
A method is provided for protecting at least one metallic surface against discolorations under the action of heat. The method includes applying a lacquer to the metallic surfaces and then stoving the metallic surface while sealing the metallic surface against oxygen contact to form a permanently effective oxygen barrier.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for preventing discoloration of at least one metallic surface comprising a first surface on a first metallic material above an automobile engine, and a second surface on a second metallic material disposed above the first metallic material, the method comprising: applying to the first and second metallic surfaces a clear lacquer that has an oxygen barrier, thereby sealing the first and second metallic surfaces against oxygen contact; and stoving the sealed first and second metallic surfaces with the lacquer thereon at a temperature in a range of 300° C. to 500° C. to form a permanently effective oxygen barrier; wherein at least part of the first metallic material is substantially impermeable to air and moisture, and wherein at least parts of the second metallic material are formed with a plurality of openings therethrough for permitting upward flow of heat away from the engine; and wherein the step of stoving is carried out for the first metallic material under a protective atmosphere of nitrogen, and wherein the step of stoving is carried out for the second metallic material under an air atmosphere. 2. The method of in claim 1 , wherein the temperature is 450° C. 3. The method of claim 1 , wherein the sealing of the second surface of the second metallic material further comprises deposition of chromium oxide by an electrochemical process so that coloring of the second surface of the second metallic material takes place at the same time.
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9303546B2 cover?
- A method is provided for protecting at least one metallic surface against discolorations under the action of heat. The method includes applying a lacquer to the metallic surfaces and then stoving the metallic surface while sealing the metallic surface against oxygen contact to form a permanently effective oxygen barrier.
- Who is the assignee on this patent?
- Porsche Ag, Porsche Ag
- What technology area does this patent fall under?
- Primary CPC classification F01N13/16. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 05 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).