Pneumatic actuator

A flexible wall section in pneumatic actuators simplifies the design by eliminating traditional seals, reducing manufacturing complexity and costs, and enabling versatile movement paths.

WO2026119651A1PCT designated stage Publication Date: 2026-06-11FESTO AG & CO KG
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
FESTO AG & CO KG
Filing Date
2025-11-26
Publication Date
2026-06-11

AI Technical Summary

⚠Technical Problem

Existing pneumatic actuators have complex designs requiring multiple seals and specific sealing surfaces, which increase manufacturing requirements and costs.

⚗Method used

The use of a flexible wall section that deforms elastically to initiate movement and provide a seal, eliminating the need for traditional seals on the piston and actuator housing surfaces, allowing for a simplified design with reduced manufacturing complexity.

🎯Benefits of technology

This design reduces manufacturing requirements and costs while enabling a combination of straight and curved movement paths, offering new design possibilities for the actuator housing and piston, and allowing for cost-effective assembly.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a pneumatic actuator (1; 31; 61; 81) for producing movement, the pneumatic actuator comprising an actuator housing (2; 32; 62; 82) and a piston (4; 34; 64; 84) which is movably received in a working recess (3; 33; 63; 83) of the actuator housing (2; 32; 62; 82) and divides the working recess (3; 33; 63; 83) into a first variable-volume working chamber (5; 35; 65; 85) and a second variable-volume working chamber (7; 37; 67; 87), wherein the first working chamber (5; 35; 65; 85) is pressure-tight and is fluidically connected to a first working port (6; 36; 66; 86) formed on the actuator housing (2; 32; 62; 82). According to the invention, the first working chamber (5; 35; 65; 85) is delimited at least in part by a flexible wall section (9, 10; 40, 41; 69, 70; 89; 90) which, when pressure is applied to the first working chamber (5; 35; 65; 85), is designed to undergo elastic deformation so as to cause movement of the piston.
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