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 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.

A system for powering a prosthetic arm is disclosed. The system includes at least one internal battery located in the prosthetic arm, at least one external battery connected to the prosthetic arm, and a master controller configured to connect either the at least one internal battery or the at least one external battery to a power bus to power the prosthetic arm.

Methods, systems, and methods of manufacture for soft robotic actuators are described herein. In one aspect, a soft robotic actuator can include an elastomeric material defining a cavity; a volume of liquid metal (LM) positioned within the cavity; and an energy source coupled to the LM, where the energy source is adapted or configured to alter a temperature of the volume of LM, whereby altering the temperature of the volume of LM initiates an actuation of the elastomeric material.

Various aspects of upper arm prosthetic system for a human subject having a body and a partial arm are described. According to one aspect, the system may comprise any one or more of a force amplification apparatus, a terminal unit apparatus, and/or an adjustable elbow apparatus. Each apparatus may be body-powered and/or comprise 3D printable structures. Related upper arm prosthetic apparatus, kits, methods, and systems also are described.

A prosthesis and control approach using electromyography (EMG) data and motion data. EMG sensors and a motion sensor provide inputs to generate control signals. The EMG sensor detects EMG signals from the user's body. The motion sensor may be one or more inertial measurement sensors (IMS) and/or a magnetic field sensor. The EMG and motion data is analyzed according to various techniques to provide control of one or more actuatable prosthetic joints of an upper limb prosthesis, such as a prosthetic elbow, wrist, hand, and/or digits.

The present disclosure provides an electrohydraulic device. The device includes a battery having a vessel containing a flowable electrolyte. The battery may be a flow cell battery, such as, for example, a redox flow cell battery. In a flow cell battery, the flowable electrolyte may a catholyte and/or an anolyte. An actuator is in fluidic communication with the vessel of the battery. The actuator is configured to be actuated using the flowable electrolyte. A cation exchange membrane may separate the vessel into an anolyte side and a catholyte side. The actuator may be in fluidic communication with either side (anolyte side or catholyte side) of the vessel.

This disclosure provides systems, apparatuses, and devices for a prosthetic digit usable with persons with amputations at or proximal to the metacarpophalangeal joint. The device restores prehension in a person with missing fingers or thumb by providing opposition to forces in the extension direction via a spring-loaded pawl and locking rack ratchet mechanism, thereby allowing an individual to manipulate or stabilize objects. The digit may be spring-loaded in the extension direction by a torsion spring or other biasing member. The pawl may be automatically disengaged from the rack when the digit reaches full flexion, and the full flexion disengage stop may be adjustable. The pawl may be automatically engaged with the rack when the digit reaches full extension, and the extension stop may be adjustable. The pawl may contain a lateral feature that creates interference with the anchoring linkage under load and limits deflection of the structure.

An outer frame for a prosthetic limb is provided. The outer frame is formed from one or more parts and has a plurality of air flow openings.

Metacarpus element for a hand prosthesis,

wherein the metacarpus element comprises at least one connecting element for connecting the metacarpus element to at least one finger frame element, and wherein the metacarpus element comprises a basic metacarpus body and a metacarpus cover, and the basic metacarpus body, together with the metacarpus cover, define a volume.

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.