Prosthetic knee with a rectification hydraulic system

Abstract

Described here are prosthetic systems, devices, and methods of use therefor. Generally, a prosthesis may be configured to set a resistance to rotation of a prosthetic joint based on a phase of gait. The prosthesis may include a first cylinder, a first piston slidable within the first cylinder, a fluid sump, and a fluid circuit. The fluid circuit may include a plurality of interconnected fluid channels having a unidirectional variable-resistance valve and a set of check valves that are configured to provide unidirectional flow through the valve during piston compression and extension.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 62 / 466,305, filed March 2, 2017, the contents of which are hereby incorporated by reference in their entirety. technical field [0003] The systems and methods herein relate to prosthetics with hydraulic damping systems, including but not limited to prosthetic knees and ankles. Background technique [0004] Prosthetics are designed to replace body parts that may be missing due to trauma, disease, or congenital conditions. There are ongoing efforts to develop prosthetics such as prosthetic knees with more natural gait or function. Some prosthetic knee joints include a hydraulic system to control the rotation of a rotor coupled to the lower leg member about the knee joint. Some hydraulic systems include hydraulic cylinders, pistons, hydraulic fluid, and hydraulic circuits having hydraulic fluid passages and valves for controlling the resistance of the h...

AI Technical Summary

Problems solved by technology

The size and complexity of the hydraulic system also affects prosthetic performance and cost

Therefore, additional prosthetic devices may be required

Images