Hydraulic controller, especially for the movement of a prostheti

Details Hydraulic controller, especially for the movement of a prostheti Hydraulic controller, especially for the movement of a prostheti

1988-10-28

1990-09-25

Oberleitner, Robert J.

Brakes

Internal-resistance motion retarder

Having a thrust member with a variable volume chamber

188318, 623 26, F16F 900, A61F 200

Patent

active

049587056

ABSTRACT:
A hydraulic controller for the motion of a prosthetic joint has a piston--cylinder unit whose working chambers on opposite sides of the piston are connected to each other by a connecting passage and to a compensating chamber which stores a volume of hydraulic fluid to compensate for the difference in the volumes of the cylinder chambers resulting from the fact that the piston rod passes through one of them. Regardless of the direction of movement of the piston in the cylinder, utilizing checkvalves and adjustable throttle elements, the flow is controlled between the chambers so that separate throttle elements can effectively control the opposite movements while check valves permit filling of chambers.

REFERENCES:
patent: 4051558 (1977-10-01), Vallotton
patent: 4266639 (1981-05-01), Schloth

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