Disclosed herein a system and a method to detect an amputee's hand muscles movements for controlling an artificial limb prosthesis. The system may comprise a plurality of passive tag positions and wearable band with a plurality of on-board position readers. The plurality of on-board position readers may be configured to capture data associated with a first plurality of passive tags positions at a first moment, and capture data associated with a second plurality of passive tags positions at a second moment. The system may further include one or more processors configured to detect at least one of the muscle contraction, the muscle relaxation, and the muscle inactivity based on the data captured at the first moment and at the second moment, and thereby control the artificial hand prosthesis movements responsive to detection at least one of the muscle contraction, the muscle relaxation, and the muscle inactivity.

An upper extremity prosthesis may include a prosthetic hand including a prosthetic thumb having a base and a tip, and a prosthetic index finger having a base and a tip. Actuators may be coupled to the upper extremity prosthesis. Prosthetic flexion tendons may have first ends operably coupled to the actuators and second ends coupled to the tips of the thumb and the index finger. Biasing systems may be operably coupled to the prosthetic thumb and the index finger. Upon actuation of the actuators in a first direction, the prosthetic flexion tendons cause the thumb and index finger to flex. Upon actuation of the linear actuators in a second direction opposite the first direction, the biasing systems cause the thumb and index finger to extend.

The invention provides for an improved disarticulated compression socket configured to secure a residual limb. The disarticulated compression socket may include a rigid socket frame, and preferably a 3-D printed socket having one or more surface channels that may secure a compression cord optionally positioned within a cord cylinder. Such compression cord may be responsive to a compression actuator and one or more disarticulated compression inserts such that activation of the compression actuator causes the retraction of the compression cord initiating the coordinated inward compression of each of said disarticulated compression inserts securing the residual limb within said socket frame.

A multi-articulated link knee joint includes: a knee unit in which an upper link unit rotates relative to a lower link unit by a multi-articulated link mechanism including a plurality of link units including the upper link unit and the lower link unit; a cylinder device for assisting the motion of the knee unit and moving in accordance with the rotation of the upper link unit; a position detector for detecting the distance from the lower link unit to the cylinder device; and an angle detector for obtaining the bending angle of the knee unit from the detected distance from the cylinder device.

A multi-articulated link knee joint includes: a knee unit in which an upper link unit rotates relative to a lower link unit by a multi-articulated link mechanism including a plurality of link units including the upper link unit and the lower link unit; a cylinder device for assisting the motion of the knee unit and moving in accordance with the rotation of the upper link unit; a position detector for detecting the distance from the lower link unit to the cylinder device; and an angle detector for obtaining the bending angle of the knee unit from the detected distance from the cylinder device.

A prosthesis with controlled linear motion and methods for adapting the device to multiple amputation points are described. The device is designed to shorten during the swing phase to prevent striking the surface of the ground, and extend at the beginning and end of the swing to provide forward propulsion and begin to transfer bodyweight load from the opposing leg. The prosthesis includes an actuator to provide linear motion, a battery, sensors, and a controller.

A method for controlling a change of resistance in an artificial joint of an orthosis, an exoskeleton or prosthesis of a lower extremity. The artificial joint has an upper part and a lower part which are secured on each other so as to be pivotable about a pivot axis, a damper unit is secured between the upper part and the lower part in order to provide a resistance to flexion or extension of the artificial joint, and the damper unit is assigned an adjusting mechanism via which the resistance is changed when a sensor signal of a control unit assigned to the adjusting mechanism activates the adjusting mechanism. The resistance is changed as a function of the position and/or length of the measured or calculated leg tendon and/or the time derivatives thereof.

To quickly and economically manufacture a prosthesis that fits the shape of a stump of a prosthesis user. A prosthesis shape data generation system provided includes: a stump shape data acquisition unit that acquires stump shape data, which is shape data on a stump of a living body; and an estimated prosthesis shape data generation unit that performs an estimation processing by inputting the stump shape data to a machine learning model that has previously learnt a correspondence between a stump shape and a shape of a part or a whole of a prosthesis that fits the stump shape, thereby generating estimated prosthesis shape data that is shape data on a part or a whole of a prosthesis that fits the stump of the living body.

A system and method for transferring proprioceptive and/or sensory information from a prosthesis or from a sensing system disposed at a body part having poor or no sensation, to the skin of a user wearing the prosthesis or the sensing system, includes: a device for providing electrotactile feedback in the form of an electrical stimulation pattern with coding scheme for at least one input signal; and at least one multi-pad electrode configured to be positioned on a part of the body of the user. The multi-pad electrode includes a plurality of pads configured to be selectively and discretely activated/deactivated according to the predefined stimulation pattern.

A prosthetic hand structure including at least one mechanical finger having a metacarpal support and a proximal stiff link connected to the metacarpal support by a proximal cylindrical joint. The mechanical finger includes a transmission member connected to the proximal stiff link. The transmission member includes a worm screw integral to the proximal stiff link. The transmission member includes a flexible rack having a first end portion, pivotally connected to the metacarpal support, and a second end portion arranged to engage with the threaded profile of the worm screw at an engagement zone of the flexible rack. The structure also includes an actuator mounted to the mechanical finger and to actuate the worm screw, causing it to rotate about its rotation axis, in such a way that, when the actuator moves the worm screw, the mechanical finger extends or flexes.