Joint for an orthopaedic device

The joint design addresses the challenge of providing a compact and efficient hydraulic system for orthotic devices by pivotably mounting cylinders and using sealing mechanisms, achieving effective movement and locking with reduced complexity and cost.

WO2026125282A1 Publication Date: 2026-06-18OTTOBOCK SE & CO KGAA
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Patent Information

Application Number
PCT/EP2025/085936
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-12-10
Filing Date
2025-12-08
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Existing technologies have not effectively addressed the challenges of providing a compact and efficient hydraulic system for orthoses, particularly in the design of prosthetic joints, such as those used in orthotic devices, which require a hydraulic system that can mimic the movement of an anatomical joint while allowing for a limited range of motion and efficient locking mechanisms.

Method used

A joint design where the first cylinder is pivotably mounted on the second joint part, allowing both cylinders to perform a pivoting movement, with pistons arranged to maintain a constant volume in the hydraulic chambers, and a sealing mechanism to prevent fluid leakage, enabling a compact and efficient hydraulic system.

Benefits of technology

The solution provides a compact and efficient hydraulic system that mimics the movement of an anatomical joint with a limited range of motion and effective locking, reducing complexity and cost while maintaining fluid sealing.

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Abstract

The invention relates to a joint for an orthopaedic device, the joint having a first joint part (2), a second joint part (4), which is arranged on the first joint part (2) so as to be pivotable about a pivot axis (36) in a pivot region, and a hydraulic system with at least one first cylinder (8), which is arranged on the second joint part (4), and has a first piston (10), which has a first longitudinal axis and is positioned in the first cylinder (8), characterised in that the first cylinder (8) is arranged at a first securing point (6) of the second joint part (4) in such a way that the first cylinder (8) performs a pivot movement relative to the second joint point (4) when the first joint part (2) is pivoted relative to the second joint part (4).
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