The present application describes a mechanical hand (100) comprising a plurality of finger assemblies (102) each selectively moveable by a respective finger drive assembly about a finger pivot axis along a finger flexion/extension plane and between a finger open position and a finger closed position; a thumb assembly (104) selectively rotatable by a first thumb drive assembly about a first thumb axis between an opposed position and a non-opposed position with respect to the finger assemblies, and selectively moveable by a second thumb drive assembly about a second thumb axis along a thumb flexion/extension plane and between a thumb open position and a thumb closed position; a controller operatively coupled to the finger and thumb drive assemblies; and a selector operatively coupled to the controller for selecting a desired thumb rotational position or a desired grip to be defined by the finger assemblies and the thumb assembly. A method of operating a mechanical hand is also described.

The present application describes a prosthetic or robot part (500), comprising at least one phalange member (532) pivotally coupled to a base (509) at a pivot axis; and a drive assembly to selectively move the phalange member about the pivot axis along a flexion/extension plane between an open position and a closed position, said drive assembly comprising a drive element (512) coupled to an actuator (506) and a driven element (514) coupled to the phalange member; wherein the driven element (514) is decouplable from the drive element (512) when the phalange member is caused to move in a first rotational direction about the pivot axis by an external force.

A prosthetic attachment for a prosthetic limb. A base is attached to the prosthetic limb. The base has a magnet that is surrounded by base valleys and base peaks. An attachment piece is attached to the prosthetic attachment. The attachment piece also has a magnet that is surrounded by attachment piece valleys and attachment piece peaks. The magnetic force between the base magnet and the attachment piece magnet attracts the prosthetic attachment to the prosthetic limb so that the base peaks and valleys mates with the attachment piece peaks and valleys for a secure removable attachment. In a preferred embodiment a locking device is used to further secure the prosthetic attachment to the prosthetic limb. In a preferred embodiment the prosthetic attachment is a prosthetic hand and the prosthetic limb is a prosthetic arm.

A prosthetic joint system for users comprising a housing having an interior cavity, a center axis in said interior cavity, and an attachment means for fixedly connecting said housing to said user; an inner cylinder disposed in said housing interior cavity wherein said inner cylinder rotates around said center axis of said housing; an appendage attached to said inner cylinder; a sensor system attached to said appendage; and a dampening system, having a power source, in communication with said sensor system, said inner cylinder, and said housing for controlling dampening of the rotation of said inner cylinder around said center axis of said housing.

The invention relates to a method for controlling an artificial knee joint which includes an upper part having an anterior side and a posterior side; a lower part mounted on the upper part so as to be pivotable about a knee axis and having an anterior side and a posterior side; a foot part arranged on the lower part; at least one sensor; a control device connected to the at least one sensor; and an actuator which is coupled to the control device and by means of which an achievable knee angle (KAmax) between the posterior side of the upper part and the posterior side of the lower part in the swing phase can be set by the control device.

Transfemoral rotator. The transfemoral rotator includes an inner cylinder that nests within a cavity of a base shell. A spring clip mechanism operated by a push button serves to lock and unlock the transfemoral rotator to allow sitting cross-legged.

A body-powered articulated prosthetic hand where each of the segments of the digits, the palmer plate, the thumb pivot plate and the wrist are individually sizeable. This allows for both a proportionately scalable hand as well as individual customization of geometric configurations tailored to specific use patterns. The hand is crushable since it has flexible and pivotable connections between digits along the length and width of the hand. It has a hollow member construction that imparts a strong lightweight design. It is modular so individual parts can be replaced for quick repair. From an aesthetics point, it is visually pleasing and can be offered in different colors, and with custom digit sleeves for specific applications. Fingers can be operated individually or in groups via pairs of cables which allow operation in either voluntary open or voluntary closed modes of control. The flexible construction allows gripping of irregularly shaped objects and deforms before failing giving indication of overload prior to failure.

An artificial foot having a longitudinal axis extending from a heel area to a toe area, a length, a width and a height is provided. The artificial foot includes a connection to a lower leg part, an upper supporting structure in the direction of height, an elastic sole structure extending from the heel area to the toe area, an elastic connecting element arranged between the upper supporting structure and the sole structure, and a coupling system. The upper supporting structure is connected to the sole structure approximately in a middle of the foot with respect to its length by means of the coupling system. The coupling system allows a relative tilting motion between the upper supporting structure and the sole structure while keeping a distance between the upper supporting structure and the sole structure in a middle of the coupling system constant, at least while a patient places weight on it when standing.

Systems, methods, and apparatus provide artificial knees. Artificial knees include a thigh link configured to move in unison with a thigh of the person, a shank link configured to be rotatably coupled to the thigh link, and a compression spring rotatably coupled to the thigh link and coupled to a second end of shank link with a second end of the compression spring. During a first range of motion, the compression spring is configured to provide an extension torque between the thigh link and the shank link causing the artificial knee to resist flexion. After the first range of motion, the compression spring is configured to provide a flexion torque between the thigh link and the shank link encouraging the artificial knee to flex resulting in toe clearance during the swing phase. During the swing phase, the compression spring provides no torque between the thigh link and the shank link.