A multi-articulated link knee joint includes an upper link provided on a thigh part side, a lower link rotatably connected to the upper link via at least one rotation shaft, a bearing that rotatably supports the rotation shaft, an elastic body provided between an outer periphery of the rotation shaft and the upper link and elastically deformable in a radial direction of the rotation shaft, and a fixing member that presses and fixes a pair of left and right front links against both end portions of the rotation shaft. The upper link and the lower link are rotatably provided on the outer periphery of the rotation shaft in a non-contact manner with the pair of left and right front links.

A prosthetic foot includes a heel member and a forefoot member. An ankle member receives the heel member and forefoot member shaft so as to allow the heel member and forefoot member to translate independently of one another.

The invention relates to an orthopedic device comprising at least one joint and a hydraulic system with at least one valve. The hydraulic system is filled with a hydraulic fluid and the hydraulic fluid contains a silicone oil (2) and an additional oil (4) which has at least one ester group.

A buffer mechanism of an artificial limb is provided, including a joint connecting base, an artificial limb connecting base, a first connecting rod connected to a front side of the joint connecting base, a second connecting rod connected to a rear side of the artificial limb connecting base, and a buffer cylinder disposed between the first connecting rod and the second connecting rod and having a sleeve, a cylinder plug and a spring. The cylinder plug is detachably disposed at one end of the sleeve, the side surface of the first connecting rod facing the second connecting rod is disposed with a roller arm, an end of the roller arm is pivotally connected with a roller, and the roller arm contacts the end face of the cylinder plug by the roller. The present disclosure can reduce the wear rate of the cylinder plug and decrease the friction force.

It is an object of the present invention to provide a technique capable of making a knee joint of an artificial leg close to a movement of a knee of a human body with a simple configuration. The knee joint component 4, which is one application example of the present invention, includes a first oil passage 20 connecting a first oil chamber 13a and a second oil chamber 13b in a cylinder tube 12 coupled to a socket 8 mounted on a thigh part 7, a second oil passage 30 branched from the first oil passage 20 so as to be in parallel with the first oil passage 20, and a switching mechanism 50 that switches whether a oil 19 passes through the first oil passage 20 or the second oil passage 30, which are different from the first oil passage 20 in the passage characteristics, and the switching mechanism 50 that is rotatably mounted around the first rotating shaft 53 and that is rotatable by its own weight when the artificial leg 9 is tilted, and a first rotating member 52 that switches whether the oil 19 passes through the first oil passage 20 or the second oil passage 30 by opening or closing the inlet/outlet 31,32 of the second oil passage 30.

A prosthetic ankle joint for a prosthetic foot attached to a base assembly. A linkage assembly provided between the base assembly and a torque bracket including an adapter unit disposed at top of the torque bracket to provide a connection to a lower tube-shaped clamp fitted over a pilon. The pilon extends upward to a second tube-shaped clamp connected to a lower portion of a socket receiving a residual limb of an amputee.

It is an object of the present invention to provide a technique capable of making a knee joint of an artificial leg close to a movement of a knee of a human body with a simple configuration. The knee joint component 4, which is one application example of the present invention, includes a first oil passage 20 connecting a first oil chamber 13a and a second oil chamber 13b in a cylinder tube 12 coupled to a socket 8 mounted on a thigh part 7, a second oil passage 30 branched from the first oil passage 20 so as to be in parallel with the first oil passage 20, and a switching mechanism 50 that switches whether a oil 19 passes through the first oil passage 20 or the second oil passage 30, which are different from the first oil passage 20 in the passage characteristics, and the switching mechanism 50 that is rotatably mounted around the first rotating shaft 53 and that is rotatable by its own weight when the artificial leg 9 is tilted, and a first rotating member 52 that switches whether the oil 19 passes through the first oil passage 20 or the second oil passage 30 by opening or closing the inlet/outlet 31,32 of the second oil passage 30.

A prosthetic foot has a frame, a forefoot keel, a heel keel, and an adjustable spring member. The frame couples to a prosthetic leg. The forefoot keel includes a first resilient substrate extending from the frame to the anterior end of the foot. The heel keel member includes a second resilient substrate extending from the frame to the posterior end. The first and second resilient substrates are load bearing substrates for a walking human. The adjustable spring member includes a third resilient substrate and a brake. The third resilient substrate has a first end directly or indirectly coupled to the brake, and a second end coupled to the forefoot keel proximate to the anterior end. The third resilient substrate extends through or around the first resilient member and the second resilient member. The brake provides resistance to the travel of the first end of the third resilient substrate in the superior direction.

A prosthetic foot has a frame, a forefoot keel, a heel keel, and an adjustable spring member. The frame couples to a prosthetic leg. The forefoot keel includes a first resilient substrate extending from the frame to the anterior end of the foot. The heel keel member includes a second resilient substrate extending from the frame to the posterior end. The first and second resilient substrates are load bearing substrates for a walking human. The adjustable spring member includes a third resilient substrate and a brake. The third resilient substrate has a first end directly or indirectly coupled to the brake, and a second end coupled to the forefoot keel proximate to the anterior end. The third resilient substrate extends through or around the first resilient member and the second resilient member. The brake provides resistance to the travel of the first end of the third resilient substrate in the superior direction.

A prosthetic foot, including a keel having a longitudinal axis. The keel includes a keel body including a heel portion, a forefoot portion, and an ankle portion positioned between the heel portion and the forefoot portion. The ankle portion includes a housing having a vertically oriented central axis. In addition, the prosthetic foot includes a coupling assembly disposed within the housing of the ankle portion. The coupling assembly includes a bearing member disposed about the central axis, a support sleeve concentrically disposed about the bearing member, and an embedding member disposed about the support sleeve. The embedding member includes a plurality of interlocking rings.