A rotary drive member drives a driven member. A ring surrounding the driven member has two cam recesses containing lock members between cam surfaces of cam recesses and the ring. Each recess accommodates an associated lock member at different locations where the recess is shallower. Driving the driven member is permitted in a given rotation relative to the ring, but each lock member inhibits rotation of the driven member in the opposite sense. The recesses extend in opposite directions. Coupling between the driven members is free-play whereby reversal in the rotation disengages members and reengages. Protuberances extending into cam recesses retain a lock member associated with one recess at the deeper location permitting movement of the other lock member towards the shallower location. Upon reversal of the rotation, the protuberances retain another lock member at the deeper location permitting movement of one lock member.

A prosthetic digit usable with capacitive panels is provided. The digit includes at least one conductive layer surrounding the body of the digit, and a non-conductive sealing layer around the conductive layer preventing direct external contact of the conductive layer with the capacitive panel. The digit may have a conductive tip pad to create a series capacitive pathway between the conductive layer of the body and the electrodes of the capacitive panel. Using the digit with a capacitive panel does not require a direct conductive pathway, e.g., a pathway between the capacitive panel and the structure of the device, the user's skin, or metallic sink.

Prosthetic devices, such as prosthetic hands (including, e.g., bionic prosthetic hands controlled by myoelectric signals and/or equipped with force sensors for feedback) can utilize a modular design to simplify assembly and repair. In some embodiments, low-cost additive manufacturing techniques are employed, e.g., to create prosthetic device parts with complex interior geometries and/or functionally integrated components.

A neurostimulator incorporating a novel chip design that uses the principle of redundant signal crossfiring to overcome electronic component mismatch error in general and transistor mismatch error in particular, to yield superior quality neurostimulation signal generation, useful in enhancing the bidirectional human-machine interface in prosthesis operation for the restoration of somatosensation for an amputee.

An apparatus for assisting a finger motion, including a palm support installed to surround a part of a hand-back and a wrist; an extension assist unit secured at a first side thereof to a middle phalanx region of a finger and connected at a second side thereof to the palm support to assist extension of the finger through an elastic force between both ends; and a flexion assist unit comprising a distal phalange support mounted on an end of the finger, and a first flexion wire and a second flexion wire mounted on a part of the finger and assisting flexion of the finger on the basis of tensile force supplied from an outside.

A covering shell for a prosthesis of a given limb, the shell having at least two zones of different flexibility. The arrangement of the zones of the covering shell in relation to one another corresponding to the arrangement of the parts of the given limb having different hardnesses. An exoskeletal structure, having preferably a tubular shape, of a prosthesis of a given limb. The exoskeletal structure being designed to provide a connection between a socket and a hand prosthesis or between a socket and a foot prosthesis, in order to form the prosthesis of the limb. The exoskeletal structure having at least two zones of different flexibility. The arrangement of the zones of the exoskeletal structure in relation to one another corresponding to the arrangement of the parts of the given limb having different hardnesses.

A hand prosthesis base body having an outer side, a motor, and a first rotatable shaft which is connected with an output shaft of the motor. The first rotatable shaft has a coupling element for a detachably coupling at least one finger element to the rotatable shaft.

A prosthetic finger device includes a base piece configured to fit on a proximal phalanx portion of the amputated finger, and a tip piece configured to fit on a middle phalanx portion of the amputated finger, wherein the tip piece is pivotally connected to the base piece by a hinge that is integrally formed with the tip piece and the base piece.

The invention discloses a bionic wrist joint based on an asymmetric 3-RRR parallel mechanism, including: an asymmetric 3-RRR parallel mechanism and a drive unit. The asymmetric 3-RRR parallel mechanism includes: a moving platform, a first static platform, and three asymmetrically distributed parallel branch chains, wherein each branch chain includes a passive rod and an active rod. An end of the active rod is connected to the first static platform via the revolute pair, and another end thereof is connected to the passive rod via the revolute pair. The axes of the revolute pairs at two ends of the active rod form an axis included angle. Three axis included angles are different, the passive rod and the moving platform are connected by the revolute pair, and three axis included angles corresponding to the passive rods are different. The drive unit is configured to drive the asymmetric 3-RRR parallel mechanism to move.

Routines and methods disclosed herein can increase a power efficiency of a prosthetic hand without drastically reducing the speed at which it operates. A prosthesis can implement an acceleration profile, which can reduce an energy consumption of a motor, or an amount of electrical and/or mechanical noise produced by a motor, as the motor as the motor transitions from an idle state to a non-idle state. A prosthesis can implement a deceleration profile, which can reduce the energy consumption of the motor, or an amount of electrical and/or mechanical noise produced by a motor, as the motor transitions from a non-idle state to an idle state.