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US 4,065,815 AGranted
Hydraulically controlled artificial leg
OwnerChen Sen-Junginventor
Life of this patent
Estimating the term…
Abstract
An artificial leg comprising a hydraulic system which is connected to a pushing rod of an ankle cap through a transfer rod, a foot which bears a recess to accept one end of the pushing rod and a knee part with its two ends separately connected to an outer shell and a pole means of the hydraulic system wherein the hydraulic system functions through a series of mechanical operations to automatically control the straightening and bending of the knee joint of the artificial leg.
Claims6
An artificial leg comprising a hydraulic system which is connected to a pushing rod of an ankle cap through a transfer rod;
- a foot bearing a recess receiving one end of the pushing rod;
- and a knee with its two ends separately connected to an outer shell and a pole means of the hydraulic system, wherein the hydraulic system comprises a transfer arm with a protuberance formed thereon and pivoted upon a pin;
- a plug for stoppling oil flow and having a first hole formed thereon;
- a link means connecting the transfer arm and the plug;
- a set of oil inlet, outlet, passageways and adjuster for oil flow, said pole means having one end connected to the knee through a pivot and the other end shaped into a needle part which is inserted into a second hole in the hydraulic system at least partially in alignment with the first hole on the plug;
- and a piston part on the pole means for compressing the hydraulic oil through said oil passageways into a chamber in the hydraulic system, so that the knee joint of the artificial leg can straighten or bend automatically and synchronously to the ankle motion through the hydraulic system.
3 more elements
Dependencies are inferred from the claim text.