Corrosion resistant pneumatic actuator
US-2016356208-A1 · Dec 8, 2016 · US
Pneumatic actuator
US2017306992A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017306992-A1 |
| Application number | US-201415510199-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 25, 2014 |
| Priority date | Nov 25, 2014 |
| Publication date | Oct 26, 2017 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
A spring provided in a pneumatic actuator is held by a spring holder. A winding tip portion of the spring is bent inwardly. The spring holder includes a spring guide having a part that is depressed and formed as a depressed portion. Rotation of the spring is prevented by disposing the winding tip portion of the spring in the depressed portion of the spring holder.
First claim
Opening claim text (preview).
1 . A pneumatic actuator comprising: a housing into which air pressure is to be applied; a spring holder, provided within the housing, to perform a reciprocal movement along with a diaphragm by the air pressure to be applied; a rod attached to the spring holder and reciprocally movable along with the spring holder; a spring, provided within the housing, and contractable and extendable by the reciprocal movement of the spring holder to provide a biasing force; and a rotation limiting portion for limiting rotation of the spring. 2 . The pneumatic actuator according to claim 1 , wherein a winding tip portion of the spring is bent inwardly, a convex portion is formed in the spring holder, along an inner periphery of the spring, and the rotation limiting portion is a depressed portion which is obtained by depressing a part of the convex portion and in which the winding tip portion is to be disposed. 3 . The pneumatic actuator according to claim 1 , further comprising a raised portion provided in the spring holder, and a convex portion provided on the raised portion and formed along an inner periphery of the spring, wherein a winding tip portion of the spring protrudes in an axial direction, and the rotation limiting portion is an insertion hole which is formed in the raised portion and into which the winding tip portion is to be inserted. 4 . The pneumatic actuator according to claim 1 , wherein a convex portion is formed in the spring holder, along an inner periphery of the spring, and the rotation limiting portion comprises a claw that is formed in the spring holder, and abuts on a winding tip portion of the spring to limit the rotation of the spring. 5 . The pneumatic actuator according to claim 4 , wherein the winding tip portion is extended to the outside of the spring, and the claw is formed on either side of the winding tip portion. 6 . The pneumatic actuator according to claim 1 , wherein a winding tip portion of the spring is extended to the outside, a concave portion is formed in the spring holder, along an outer periphery of the spring, and the rotation limiting portion is a depressed portion which is obtained by depressing a part of the convex portion and in which the winding tip portion is to be disposed. 7 . The pneumatic actuator according to claim 1 , wherein the spring is positioned in a rotation direction in such a manner that a difference in the air pressure resulting from a difference in operation directions of the rod is not more than a permissible value.
Assignees
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Classifications
- F15B15/10Primary
the motor being of diaphragm type · CPC title
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Frequently asked questions
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- What does patent US2017306992A1 cover?
- A spring provided in a pneumatic actuator is held by a spring holder. A winding tip portion of the spring is bent inwardly. The spring holder includes a spring guide having a part that is depressed and formed as a depressed portion. Rotation of the spring is prevented by disposing the winding tip portion of the spring in the depressed portion of the spring holder.
- Who is the assignee on this patent?
- Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification F15B15/10. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Oct 26 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).