Combined oil control ring
US-9657838-B2 · May 23, 2017 · US
Combined oil control ring
US10247306B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10247306-B2 |
| Application number | US-201615564844-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 8, 2016 |
| Priority date | Apr 9, 2015 |
| Publication date | Apr 2, 2019 |
| Grant date | Apr 2, 2019 |
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- Title
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Abstract
Official abstract text for this publication.
To provide a combined oil control ring comprising a pair of upper and lower side rails and an axially corrugated spacer expander having upper and lower portions for automobile engines, which is capable of keeping an excellent oil-controlling function without sticking between a spacer expander and side rails even in a long period of engine operation, the upper and lower portions of the spacer expander have tabs pushing inner peripheral surfaces of the side rails, projections supporting the side rails, and intermediate portions between the tabs and the projections; and each intermediate portion opposing the side rail has a center-raised bottom having a center-raised shape when viewed along a substantially circumferential direction center-raised shape and a radial direction.
First claim
Opening claim text (preview).
What is claimed is: 1. A combined oil control ring comprising a pair of upper and lower side rails, and an axially corrugated spacer expander having upper and lower portions; said upper and lower portions of said spacer expander having tabs pushing inner peripheral surfaces of said side rails, projections supporting said side rails, and intermediate portions between said tabs and said projections; each intermediate portion opposing said side rail having a bottom which is center-raised when viewed along a substantially circumferential direction and a radial direction. 2. The combined oil control ring according to claim 1 , wherein the height p of said center-raised bottom is 0.5-20% of the combined width h1. 3. The combined oil control ring according to claim 1 , wherein each center-raised bottom is constituted by curved surfaces. 4. The combined oil control ring according to claim 1 , wherein each center-raised bottom is constituted by pluralities of flat planes. 5. The combined oil control ring according to claim 3 , wherein each center-raised bottom has a domed or conical shape. 6. The combined oil control ring according to claim 4 , wherein each center-raised bottom has a pyramid or truncated pyramid shape.
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Frequently asked questions
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- What does patent US10247306B2 cover?
- To provide a combined oil control ring comprising a pair of upper and lower side rails and an axially corrugated spacer expander having upper and lower portions for automobile engines, which is capable of keeping an excellent oil-controlling function without sticking between a spacer expander and side rails even in a long period of engine operation, the upper and lower portions of the spacer ex…
- Who is the assignee on this patent?
- Kk Riken
- What technology area does this patent fall under?
- Primary CPC classification F16J9/068. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 02 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).