Hermetic seal device
US-2016153564-A1 · Jun 2, 2016 · US
Seal device
US9702463B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9702463-B2 |
| Application number | US-201515117295-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 16, 2015 |
| Priority date | Mar 7, 2014 |
| Publication date | Jul 11, 2017 |
| Grant date | Jul 11, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A sealing device includes an elastic annular seal portion. On an inner peripheral surface of the seal portion, a main lip is in slidable contact with an outer peripheral surface of a rotary shaft, and a vacuum space side inclined surface gradually enlarges in diameter from the main lip toward a vacuum space side. On the vacuum space side inclined surface, a first annular projection is in slidable contact with the outer peripheral surface of the rotary shaft, and a second annular projection that projects toward a radially inward side is disposed between the main lip and the first annular projection. In an initial use state of the sealing device, the second annular projection is not in slidable contact with the rotary shaft; when the main lip wears to a degree that required sealing performance cannot be maintained, the second annular projection starts slidable contact with the rotary shaft.
First claim
Opening claim text (preview).
The invention claimed is: 1. A sealing device which partitions an annular space formed between a rotary shaft and a housing surrounding the rotary shaft, into a low-pressure space and a high-pressure space whose pressure is higher than that of the low-pressure space, in an axial direction, the sealing device comprising: an annular seal portion formed of an elastic material and being in slidable contact with an outer peripheral surface of the rotary shaft, wherein on an inner per…
Assignees
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Classifications
- F16J15/008Primary
Mechanical Engineering · mapped topic
- F16J15/3232Primary
Mechanical Engineering · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US9702463B2 cover?
- A sealing device includes an elastic annular seal portion. On an inner peripheral surface of the seal portion, a main lip is in slidable contact with an outer peripheral surface of a rotary shaft, and a vacuum space side inclined surface gradually enlarges in diameter from the main lip toward a vacuum space side. On the vacuum space side inclined surface, a first annular projection is in slidab…
- Who is the assignee on this patent?
- Koyo Sealing Techno Co Ltd, Nabtesco Corp
- What technology area does this patent fall under?
- Primary CPC classification F16J15/008. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jul 11 2017 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).