Buffering device for the operating mechanism of a switchgear, and method of lubrication thereof
US-9570891-B2 · Feb 14, 2017 · US
Buffering device for the operating mechanism of a switchgear, and method of lubrication thereof
US9178339B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9178339-B2 |
| Application number | US-201414460901-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 15, 2014 |
| Priority date | Oct 9, 2009 |
| Publication date | Nov 3, 2015 |
| Grant date | Nov 3, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A piston rod ( 15 ) and a first piston ( 13 ) are arranged in the interior of an external cylinder ( 11 ) and internal cylinder ( 12 ); a second piston for absorbing the change of volume of operating fluid ( 24 ) is also arranged therein. Also, a first return spring ( 18 ) for returning the piston rod ( 15 ) to the interruption position is provided and a second return spring ( 20 ) for returning the operating fluid 24 into the high-pressure chamber ( 25 ) by pressurizing the second piston ( 14 ) is provided. In addition, the air in the interior of the buffering device ( 10 ) is withdrawn by a vacuum pump ( 38 ), and operating fluid ( 24 ) is thus introduced in a degassed condition.
First claim
Opening claim text (preview).
What is claimed is: 1. A buffering device employed in an operating mechanism whereby opening/closing action of a switchgear is performed by reciprocal drive of a moving body including an electrical contact between open and closed positions, for reducing the speed of said moving body in a vicinity of termination of an action of a switchgear, said buffering device comprising: (1) an external cylinder and internal cylinder that are provided on a same central axis; (2) a first pisto…
Assignees
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Classifications
- H01H33/304Primary
Electricity · mapped topic
Mechanical Engineering · mapped topic
- H02B13/0354Primary
Electricity · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9178339B2 cover?
- A piston rod ( 15 ) and a first piston ( 13 ) are arranged in the interior of an external cylinder ( 11 ) and internal cylinder ( 12 ); a second piston for absorbing the change of volume of operating fluid ( 24 ) is also arranged therein. Also, a first return spring ( 18 ) for returning the piston rod ( 15 ) to the interruption position is provided and a second return spring ( 20 ) for returnin…
- Who is the assignee on this patent?
- Toshiba Kk
- What technology area does this patent fall under?
- Primary CPC classification H01H33/304. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Nov 03 2015 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).