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Single-acting rotary actuator

An actuator, rotary technology, used in fluid pressure actuation devices, mechanical equipment, etc., to solve problems such as complexity, time-consuming assembly and replacement processes, etc.

Inactive Publication Date: 2015-08-19
GENERAL EQUIP & MFG COMPANY INC D B A TOPWORX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such assembly and replacement process can be time consuming and complex

Method used

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  • Single-acting rotary actuator
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Examples

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Embodiment Construction

[0040] While many different embodiments are explained in detail below, it should be understood that the legal scope of the invention is defined by the claims at the end of the patent. The detailed description should be construed as an example or examples only, and does not describe every possible embodiment, since describing every possible embodiment would be impractical, if not impossible. Many alternative embodiments could be implemented, using either current technology or technology developed after the filing date of this application, which would still fall within the scope of the claims.

[0041] It should also be understood that unless a term is expressly defined herein by the phrase "As used herein, the term "_____" is hereby defined to mean..." or similar, there is no intended To limit the meaning of such terms, either expressly or implicitly, beyond their literal or ordinary meaning, such terms should not be construed as limiting any statement made in accordance with a...

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Abstract

A rotary actuator comprises a housing, a shaft, at least one piston, and at least one closed-wound power spring coupled to the shaft. The housing defines a cavity. The shaft is disposed supported within the cavity of the housing and adapted for rotational displacement between a first position and a second position. The at least one piston is supported within the cavity of the housing and operatively coupled to the shaft. The piston is adapted for sliding displacement in association with rotational displacement of the shaft. The at least one closed-wound power spring is disposed within the cavity of the housing and operatively coupled to the shaft. So configured, the closed-wound power spring biases the shaft and the at least one piston into a predetermined relationship.

Description

technical field [0001] The present invention relates generally to rotary actuators and, more particularly, to single acting, eg fail open or fail closed rotary actuators. Background technique [0002] Conventional rotary actuators can include rack and pinion actuators and Scotch yoke actuators. Typically, these types of rotary actuators include a control assembly that can be displaced under the pressure of, for example, a pneumatic supply line. In some rack and pinion actuators and Scotch yoke actuators, the control assembly includes a pair of opposing pistons operatively connected to a rotatable shaft. When the secondary piston moves toward each other, the shaft rotates in a first direction. The shaft rotates in a second direction opposite to the first direction when the secondary piston moves away from the other. [0003] Typically, the control assemblies of such conventional rotary actuators are controlled by one or more pneumatic inputs and can be classified as single...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B15/06
CPCY10T74/18568F15B15/061
Inventor B·R·彭宁
Owner GENERAL EQUIP & MFG COMPANY INC D B A TOPWORX