Computer controlled prosthetic knee device

Details Computer controlled prosthetic knee device Computer controlled prosthetic knee device

2006-07-28

2010-02-02

Snow, Bruce E (Department: 3738)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Leg

Knee

Reexamination Certificate

active

07655050

ABSTRACT:
A prosthetic knee provides a single axis of rotation and includes a hydraulic damping cylinder, a microprocessor, and sensors. Based on input from the sensors, the microprocessor selects a flow path within the hydraulic cylinder in order to provide the proper amount of knee resistance to bending for a given situation. The resistance of each flow path within the hydraulic cylinder is manually preset. Changes in gait speed are accommodated by employing a hydraulic damper with intelligently designed position sensitive damping. Moreover, the knee need not be un-weighted to transition from the stance phase to the swing phase of gait. As a result, the knee safely provides a natural, energy efficient gait over a range of terrains and gait speeds and is simpler, less costly, and lighter weight than the prior art.

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