A flexible inner socket is fabricated by forming a pre-socket. The pre-socket includes a body formed with an opening and an enclosed end. The enclosed end is opposite to the opening. The body of the pre-socket has an outer circumference that is smaller than the inner circumference of the rigid prosthetic socket. Different portions of the body may have different thicknesses. The preform socket is heated. After the heating, the flexible inner socket is formed by molding the pre-socket onto the inner surface of the rigid prosthetic socket to form the flexible inner socket. The inner circumference of the rigid prosthetic socket is reduced by a thickness of the flexible inner socket when the flexible inner socket is attached to the inner surface of the rigid prosthetic socket. An opening of the flexible inner socket may be trimmed after the formation to fit contours of an opening of the rigid prosthetic socket.

A control unit system. The system includes a control unit which includes a control unit charging interface, at least one magnet located proximate to the control unit charging interface, at least one actuator, a detachable manifold including at least one magnet, fluidly coupled to the at least one actuator, a pump connected to the at least one actuator for causing actuation thereof, and a control system for controlling the pump, wherein the control system controls the pump to actuate the at least one actuator at least in response to a signal received by the control system. The system also includes a recharging device configured to receive the control unit, the recharging device including a reed switch, wherein when the magnet in the control unit is located proximate to the reed switch, the switch is activated.

A disarticulated compression socket configured to secure a residual limb. The disarticulated compression socket may include a rigid socket frame having one or more compression apertures each having one or more disarticulated compression inserts. Each disarticulated compression insert may be coupled with, and responsive to, a compression actuator configured to adjust the disarticulated compression insert individually, or in concert. In one preferred embodiment, at least one compression actuator may be coupled with one, or a plurality of disarticulated compression inserts and further configured to retract and/or expand the coupled disarticulated compression inserts securing the residual limb within said socket frame. Control of the compression actuators may be manual or automatic in response to a signal from a sensor. Additional embodiments may also include one or more lateral release channels configured to accommodate soft tissue expansion of the residual limb as it is compressed and/or secured within the socket frame.

An adjustable overlaying interface for adjusting a prosthesis to a liner worn over a residual limb of a user comprises a sleeve, an inflatable bladder and a fluid-providing device. The variations in volume of the residual limb is compensated by using the fluid-providing device to inflate and/or deflate the inflatable bladder. A kit for adjusting the prosthesis to the residual limb comprises a liner and the adjustable overlaying interface. A method for mounting the prosthesis to the residual limb of a user comprises installing the adjustable overlaying interface over a liner donned over the residual limb of the user, at least partially inserting the residual limb wearing the liner and the adjustable overlaying interface within a socket of the prosthesis and inflating or deflating the inflatable bladder of the adjustable overlay interface to compensate variations in volume of the residual limb.

Systems and methods for modular adjustable prosthetic volume compensation are disclosed herein. In one embodiment, a system for adjusting fit of a prosthetic device includes: a pump having a bleed actuator, a plunger and a pressure bulb. The system also includes a bladder fluidically coupled to the pump. The bladder lines a posterior section of an interior of a prosthetic device. A volume of the bladder is changeable by a pumping action of the pump. The volume of the bladder at least partially determines a space available inside the prosthetic device. The bleed actuator is configured to decrease a volume of the bladder. The plunger in operation squeezes the pressure bulb of the pump.

An enveloping body for at least partly enveloping a limb, comprising an enclosed volume and a connection for supplying fluid to the volume and discharging it from the volume, wherein the enveloping body defines an inner circumference and an outer circumference, wherein the inner circumference of the enveloping body increases as the pressure of the volume increases.

An incompressible fluid is used to adjust fit for a prosthetic device, the use of a closed loop control system and force, motion, and position measurement to aid with algorithms controlling the fit of the prosthetic device to a residual limb. Embodiments include automatic actuation, based on triggering of threshold values from sensors, a powered full release feature, use of hydraulic transducers to transfer fluid pressure to force on a limb, and customizable pressure distribution pads and embedded valves in transducers to prevent backflow and allow stabilization of the residual limb. A retrofit system may be used for existing prosthetic sockets. A triggering algorithm utilizes measured force exceeding a threshold or thresholds with a characteristic pulse signature and a triggering of release based on a combination of total motion and measured force below a threshold or thresholds.

A disarticulated compression socket configured to secure a residual limb. The disarticulated compression socket may include a rigid socket frame having one or more compression apertures each having one or more disarticulated compression inserts. Each disarticulated compression insert may be coupled with and/or responsive to a compression band configured to compress the disarticulated compression inserts and thereby secure a residual limb within the rigid socket frame.

A hydraulic system for adjusting a prosthetic limb. The hydraulic system may include an expandable pad mounted onto an interior surface of a socket of the prosthetic limb. The hydraulic system may further include a hydraulic cylinder and a plunger mechanism. The hydraulic cylinder may be filled with a hydraulic oil. The hydraulic system may be configured to expand the expandable pad by pumping the hydraulic oil from the hydraulic cylinder into the expandable pad responsive to a volume decrease of the residual limb being more than a threshold.

A lower limb prosthetic device for use when bathing and showering includes a first shell. A rod is coupled to and extends substantially perpendicularly from an upper face of the first shell. A second shell, which has a top that is open, is coupled to and extends from the rod distal from the first shell. The second shell is substantially complementary to and configured to insert a stump of an amputated leg. A plurality of bladders, which is selectively inflatable, is coupled to an inner surface of the second shell. The bladders are configured to be inflated to couple the second shell to the stump. A plurality of first holes and a plurality of second holes are positioned through the first shell and the second shell, respectively. The first holes and the second holes are configured to drain water from the first shell and the second shell, respectively.