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Apparatus and method for reducing actuator thrust requirements in a control valve

US9218005B2 · US · B2

Patent metadata
FieldValue
Publication numberUS-9218005-B2
Application numberUS-201213681795-A
CountryUS
Kind codeB2
Filing dateNov 20, 2012
Priority dateNov 20, 2012
Publication dateDec 22, 2015
Grant dateDec 22, 2015

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  1. Title

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  2. Abstract

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  3. Assignees and inventors

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  4. Key dates

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  5. First independent claim

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  6. CPC / IPC classifications

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  7. Citations and related patents

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Abstract

Official abstract text for this publication.

A trim assembly is provided with a cage with an internal surface and a cage port. A plug having an external surface is disposed in the cage and is operable between a closed position, a pressure balancing position and an open position. The trim assembly also includes a low friction flow restrictor disposed between the cage and the plug and a pressure energized seal disposed between the cage and the plug. A seal balancing volume defined by the internal surface of the cage, the external surface of the plug, the low friction flow restrictor and the pressure energized seal is provided. The seal balancing volume is in fluid communication with the cage port through the low friction flow restrictor and is maintained at a seal balancing volume pressure. The trim assembly further includes a pressure control assembly configured to vent the seal balancing volume.

First claim

Opening claim text (preview).

What is claimed: 1. A trim assembly, comprising: a cage with an interior surface and a cage port; a plug disposed in the cage, the plug having an external surface and being operable between a closed position, a pressure balancing position, and an open position; a low friction flow restrictor disposed between the cage and the plug; a pressure energized seal disposed between the cage and the plug; a seal balancing volume; a pressure control assembly configured to pressuriz…

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View patent family 49641894

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Frequently asked questions

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What does patent US9218005B2 cover?
A trim assembly is provided with a cage with an internal surface and a cage port. A plug having an external surface is disposed in the cage and is operable between a closed position, a pressure balancing position and an open position. The trim assembly also includes a low friction flow restrictor disposed between the cage and the plug and a pressure energized seal disposed between the cage and …
Who is the assignee on this patent?
Dresser Inc
What technology area does this patent fall under?
Primary CPC classification F16K39/024. Mapped technology areas include Mechanical Engineering.
When was this patent published?
Publication date Tue Dec 22 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).