Piston compression rings of copper-nickel-tin alloys
US-2018195612-A1 · Jul 12, 2018 · US
Compression piston ring
US10428944B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10428944-B2 |
| Application number | US-201615742356-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 22, 2016 |
| Priority date | Jul 24, 2015 |
| Publication date | Oct 1, 2019 |
| Grant date | Oct 1, 2019 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The running face of a compression piston ring also having an inner circumferential surface, and upper and lower flank surfaces interposed between the running face and the inner circumferential surface is provided, in a region thereof adjacent the lower flank, with a first taper of less than 30′, having an axial height of 10 to 30%, based on the total running face height (H), the first taper transitioning into a second taper extending in the direction toward the upper flank surface, which is between 90′ and 200′, and the running face is also provided with a thin wear-resistant layer having a thickness from 0.1 to less than 20 μm, and in particular 4 to 6 μm.
First claim
Opening claim text (preview).
The invention claimed is: 1. A compression piston ring, comprising a running face, an inner circumferential surface, and upper and lower flank surfaces interposed therebetween, wherein a first taper (α) less than 30′ having an axial height (h) of 10 to 30%, based on the total running face height (H), is provided on the running face in a region thereof adjacent the lower flank surface, the first taper transitioning into a second taper (β) extending in a direction toward the upper flank surface and which is between 90′ and 200′, and wherein a wear-resistant layer having a thickness from 0.1 to less than 20 μm is provided on the entire running face. 2. The compression piston ring according to claim 1 , wherein the wear-resistant layer is a Cr, PVD, CVD or DLC layer. 3. The compression piston ring according to claim 1 , wherein respective rounded transition regions of the wear-resistant layer where the running face transitions to the respective upper and lower flank surfaces are provided. 4. The compression ring according to claim 3 , wherein the rounded transition regions have been formed by brushing. 5. The compression ring according to claim 1 , wherein the thickness of the wear-resistant layer is 4 to 6 μm. 6. A piston of an internal combustion engine provided with a first compression ring and the compression piston ring according to claim 1 as a second compression.
Assignees
Inventors
Classifications
Rings for preventing wear of grooves or like seatings · CPC title
- F16J9/20Primary
Rings with special cross-section (L-section rings F16J9/02); Oil-scraping rings {(F16J9/06 takes precedence)} · CPC title
Piston rings, e.g. associated with piston crown · CPC title
characterised by the use of particular materials · CPC title
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- What does patent US10428944B2 cover?
- The running face of a compression piston ring also having an inner circumferential surface, and upper and lower flank surfaces interposed between the running face and the inner circumferential surface is provided, in a region thereof adjacent the lower flank, with a first taper of less than 30′, having an axial height of 10 to 30%, based on the total running face height (H), the first taper tra…
- Who is the assignee on this patent?
- Fed Mogul Burscheid Gmbh
- What technology area does this patent fall under?
- Primary CPC classification F16J9/20. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Oct 01 2019 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).