Hydraulic knee joint

Details Hydraulic knee joint Hydraulic knee joint

1999-03-30

2000-08-22

Snow, Bruce

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

Leg

Knee

623 43, A61F 264

Patent

active

061065609

ABSTRACT:
A patient-weight-activated hydraulic knee joint in which flow between hydraulic chambers is controlled by a valve operated by hydraulic pressure and by a force transmission system which transmits the force of a patient's weight, such that the valve is only closed when the patient's weight acts on the knee joint. Closure of the valve locks the knee joint, so hence undesirable locking does not occur during the swing phase of the patient's gait. A damped hydraulic trip valve can also be provided to give improved operation of the knee joint.

REFERENCES:
patent: 4662486 (1987-05-01), Stenberg
patent: 4775037 (1988-10-01), Stenberg
patent: 5376136 (1994-12-01), Stenberg

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