The present disclosure provides an ankle joint mechanism, including a shank member, a first connecting link, a foot member, a second connecting link, and a force providing element. The foot member is coupled to the shank member at a first pivot point and coupled to the first connecting link at a second pivot point. The second connecting link is coupled to the first connecting link at a third pivot point and coupled to the shank member at a fourth pivot point. The force providing element is coupled to the second connecting link at a first end and coupled to either the shank member or the foot member at a second end.

A prosthetic appendage for attachment to an outer extremity of an amputated limb that is composed of modular elements fabricated by three-dimensional printing. In one embodiment the prosthetic appendage is a leg. The prosthetic leg includes a foot portion and a plurality of modular and three-dimensionally printed limb elements. One of the plurality of limb elements is pivotally coupled to the foot portion and another of the limb elements is configured at one end to receive the outer extremity of the amputated leg. In another embodiment of the present invention the prosthetic appendage is a hand. The prosthetic hand includes a wrist element with one end configured to receive the outer extremity of an amputated hand, a base portion attached to the wrist element and a plurality of modular and three-dimensionally printed finger elements selectively coupled to adjacent finger elements or the base to form prosthetic fingers.

A passive prosthetic foot enables a below-knee amputee to walk with near able-body walking motions. The prosthetic foot includes a resilient heel that enables the heel to strike a walking surface more softly than in the prior art and more accurately transition the leg from swing phase to stance phase. The prosthetic foot is modeled generally as a wide Bézier curve, and the foot is characterized according to a set of at least 12 variables, including h, C1d, C2x, C2y, C2d, C3x, C3y, C3d, C4x, C4d, C5d and C6d, where C3y is heel size, C4x is heel geometry and C6d is curve intersection location. The variables are optimized to minimize a difference between a normal lower leg trajectory during gait and a modeled trajectory that includes the prosthetic foot.

A passive prosthetic foot enables a below-knee amputee to walk with near able-body walking motions. The prosthetic foot includes a resilient heel that enables the heel to strike a walking surface more softly than in the prior art and more accurately transition the leg from swing phase to stance phase. The prosthetic foot is modeled generally as a wide Bézier curve, and the foot is characterized according to a set of at least 12 variables, including h, C1d, C2x, C2y, C2d, C3x, C3y, C3d, C4x, C4d, C5d and C6d, where C3y is heel size, C4x is heel geometry and C6d is curve intersection location. The variables are optimized to minimize a difference between a normal lower leg trajectory during gait and a modeled trajectory that includes the prosthetic foot.

A vertical suspension system for a prosthetic foot includes a first member operatively coupleable to an amputee's residual leg. The suspension system can also include a second member coupleable to a prosthetic foot. One or more upper leaf springs and one or more lower leaf springs extend between and are attached to the first and second members such that at least one of the ends of each leaf spring is rotationally fixed to the first or second members, where the upper an lower leaf springs are spaced apart from each other.

A vertical suspension system for a prosthetic foot includes a first member operatively coupleable to an amputee's residual leg. The suspension system can also include a second member coupleable to a prosthetic foot. One or more upper leaf springs and one or more lower leaf springs extend between and are attached to the first and second members such that at least one of the ends of each leaf spring is rotationally fixed to the first or second members, where the upper an lower leaf springs are spaced apart from each other.

A method for manufacturing a custom wearable and/or implantable medical device, such as an orthosis (e.g., an ankle brace, etc.), a prosthesis or the like, includes use of scanning processes. A digital model of a surface may be applied to a digital device model to define a custom digital device model. The digital model and, thus, the custom digital device model may include one or more standard features. The custom digital device model may be used with an automated manufacturing process to make some or all of the custom wearable and/or implantable medical device. In some embodiments, additive manufacturing processes may be used to form a portion or all of the custom wearable and/or implantable medical device.

A prosthetic ankle device is disclosed herein. The prosthetic ankle device includes a hydraulic cylinder with a first chamber, a second chamber, and a piston separating the first chamber and the second chamber. The chambers are filled with hydraulic fluid. During plantarflexion, the hydraulic fluid flows between the first chamber and the second chamber via a first passage and a first check valve. During dorsiflexion, the hydraulic fluid flows between the first chamber and the second chamber via a second passage and a second check valve.

The present invention relates to a foot prosthesis (1, 61) comprising a heel (6, 71) and a tip (7, 62), both of which can bear on the ground, and an ankle support (2, 67), characterised in that the prosthesis also comprises at least one damping element (10, 76) designed to be at a distance from the ground.

The present invention relates to a foot prosthesis (1, 61) comprising a heel (6, 71) and a tip (7, 62), both of which can bear on the ground, and an ankle support (2, 67), characterised in that the prosthesis also comprises at least one damping element (10, 76) designed to be at a distance from the ground.