Hydrogen-Free Carbon Coating Having Zirconium Adhesive Layer
US-2019249310-A1 · Aug 15, 2019 · US
Shaft Seal Arrangement
US2021231217A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021231217-A1 |
| Application number | US-201917059990-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 29, 2019 |
| Priority date | May 30, 2018 |
| Publication date | Jul 29, 2021 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A shaft seal arrangement includes a slip-ring seal and a secondary seal. The adjacent seal has at least one O-ring. The O-ring is arranged so as to be axially displaceable. Between the O-ring and a seal element which forms an axial sliding surface for the O-ring, there is arranged a carbon layer to increase the mobility of the O-ring.
First claim
Opening claim text (preview).
1 - 12 . (canceled) 13 . A shaft seal arrangement, comprising: a mechanical seal; a secondary seal having at least one axially-displaceable O-ring; a seal element, a portion of the seal element having a carbon layer in a region at which the at least one axially-displaceable O-ring is located when the seal element arrangement is in an installed position, wherein the carbon layer is in contact with the at least one axially-displaceable O-ring. 14 . The shaft seal arrangement as claimed in claim 13 , wherein the carbon layer is an amorphous carbon layer. 15 . The shaft seal arrangement as claimed in claim 14 , wherein the carbon layer is a tetrahedral hydrogen-free amorphous carbon layer. 16 . The shaft seal arrangement as claimed in claim 15 , wherein the carbon layer is an applied coating. 17 . The shaft seal arrangement as claimed in claim 16 , wherein the coating has an adhesion promoter layer. 18 . The shaft seal arrangement as claimed in claim 17 , wherein the adhesion promoter layer includes more than 30% by weight of chromium. 19 . The shaft seal arrangement as claimed in claim 17 , wherein the adhesion promoter layer includes more than 60% by weight of chromium. 20 . The shaft seal arrangement as claimed in claim 17 , wherein the adhesion promoter layer includes more than 90% by weight of chromium. 21 . The shaft seal arrangement as claimed in claim 17 , wherein a thickness of the adhesion promoter layer is more than 0.03 μm and less than 0.21 μm. 22 . The shaft seal arrangement as claimed in claim 17 , wherein a thickness of the adhesion promoter layer is more than 0.06 μm and less than 0.09 μm. 23 . The shaft seal arrangement as claimed in claim 17 , wherein a thickness of the adhesion promoter layer is more than 0.09 μm and less than 0.15 μm. 24 . The shaft seal arrangement as claimed in claim 13 , wherein the hardness of the portion of the shaft sleeve having the carbon layer is more than 20 GPa, and less than 120 GPa. 25 . The shaft seal arrangement as claimed in claim 13 , wherein the hardness of the portion of the shaft sleeve having the carbon layer is more than 30 GPa, and less than 110 GPa. 26 . The shaft seal arrangement as claimed in claim 13 , wherein the hardness of the portion of the seal element having the carbon layer is more than 40 GPa, and less than 100 GPa. 27 . The shaft seal arrangement as claimed in claim 13 , wherein the thickness of the carbon layer is more than 0.3 μm and less than 30 μm. 28 . The shaft seal arrangement as claimed in claim 13 , wherein the thickness of the carbon layer is more than 0.6 μm and less than 25 μm. 29 . The shaft seal arrangement as claimed in claim 13 , wherein the thickness of the carbon layer is more than 0.9 μm and less than 20 μm. 30 . The shaft seal arrangement as claimed in claim 13 , wherein the seal element is a shaft sleeve. 31 . The shaft seal arrangement as claimed in claim 13 , wherein the seal element is as a mechanical seal carrier. 32 . The shaft seal arrangement as claimed in claim 13 , wherein the seal element is a seal cover.
Assignees
Inventors
Classifications
especially adapted for liquid pumps · CPC title
especially adapted for liquid pumps · CPC title
especially adapted for liquid pumps · CPC title
with elastic sealings, e.g. O-rings · CPC title
- F16J15/38Primary
sealed by a packing · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2021231217A1 cover?
- A shaft seal arrangement includes a slip-ring seal and a secondary seal. The adjacent seal has at least one O-ring. The O-ring is arranged so as to be axially displaceable. Between the O-ring and a seal element which forms an axial sliding surface for the O-ring, there is arranged a carbon layer to increase the mobility of the O-ring.
- Who is the assignee on this patent?
- Ksb Se & Co Kgaa
- What technology area does this patent fall under?
- Primary CPC classification F16J15/38. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Jul 29 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).