A unibody transtibial prosthetic device includes a socket personalized for a specific patient’s residual limb. A pylon extends from the socket, the pylon being a unitary polymer structure of interconnected elongated supports having open spaces therebetween. The device also includes a foot-ankle complex, the foot-ankle complex being a unitary polymer extending from the pylon, the foot and ankle unitary structure being shaped to provide multi-axial dynamic flex to enable dorsiflexion, plantar flexion, inversion and eversion motion for smooth symmetric gait performance and energy capture and return. The socket, pylon and foot-ankle complex are portions of a unibody.

A prosthetic ankle-foot device, in particular of the biomimetic type, includes: a tibia element; a talus element movably connected to the tibia element through a first talocrural joint having a first hinge joint; a calcaneus element movably connected to the talus element through a second subtalar joint having a second hinge joint; a medial metatarsal element movably connected to the calcaneus element through a third medial midtarsal joint, the third joint having a third hinge joint; a lateral metatarsal element movably connected to the calcaneus element through a fourth lateral midtarsal joint, the fourth joint having a fourth hinge joint; a medial phalanx element movably connected to the medial metatarsal element through a fifth medial metatarsophalangeal joint, the fifth joint having a fifth hinge joint; a lateral phalanx element movably connected to the lateral metatarsal element through a sixth lateral metatarsophalangeal joint, the sixth joint having a sixth hinge joint; an elastic actuation element having an upper part movably connected to the tibia element and a lower part movably connected to the calcaneus element.

Prosthetic feet that provide improved rollover and performance are provided. A prosthetic foot can include a lower foot member extending from a heel end to a toe end, a second foot member disposed above the lower foot member, and an optional third foot member disposed above the second foot member. The second foot member is tapered such that its thickness decreases toward the proximal end. Optionally, the second foot member can taper toward its distal end as well as toward its proximal end from an intermediate location on the second foot member. The third foot member can be tapered such that its thickness decreases toward the distal end. There can be a gap between a distal end of the third foot member and the second foot member that closes during dorsiflexion of the prosthetic foot during use and provides dynamic stiffness control to the prosthetic foot.

A prosthetic ankle and foot combination has an ankle joint mechanism constructed to allow damped rotational movement of a foot component relative to a shin component. The mechanism provides a continuous hydraulically damped range of ankle motion during walking with dynamically variable damping resistances, and with independent variation of damping resistances in the plantar-flexion and dorsi-flexion directions. An electronic control system coupled to the ankle joint mechanism includes at least one sensor for generating signals indicative of a kinetic or kinematic parameter of locomotion, the mechanism and the control system being arranged such that the damping resistances effective over the range of motion of the ankle are adapted automatically in response to such signals. Single and dual piston hydraulic damping arrangements are disclosed, including arrangements allowing independent heel-height adjustment.

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.

Technology is described to provide a foot/ankle prosthesis for individuals with transfemoral limb loss. This technology is able to store and release energy and thus individuals or patients who are using the foot/ankle prosthesis are able to expend less energy when walking or running. The device or system can include a prosthetic foot/ankle system with a linear or rotary hydraulic damper such that the hydraulic damper is attached to dynamic energy storing spring elements. The axis of rotation of the system can be near to that of an intact human ankle. The system can utilize spring elements based on the vertical displacement of the center of pressure of an intact normal foot. The system can also provide user adjustable heel height.

One aspect of the invention provides a prosthetic foot including a heel member, a toe member, and an attachment member comprising a shear thickening material (STM). In one embodiment, the attachment member has a first end and a second end. The first end can be connected to the heel member, and the second end can be connected to the toe member. In another embodiment, the attachment member further comprises an elastic polymer. In one instance, the elastic polymer is impregnated with the STM. In yet another embodiment, the attachment member further comprises an elastic reservoir. The elastic reservoir can contain the STM. Alternatively, the attachment member further comprises a rigid reservoir. The rigid reservoir can contain the STM.

A self-aligning prosthetic foot and ankle assembly has an ankle unit pivotally mounting a foot component. The ankle unit contains a hydraulic piston and cylinder assembly having a piston which is linearly movable within a cylinder. The axis of the cylinder is coincident with a shin axis defined by a shin connection interface on the ankle unit. Bypass passages containing damping resistance control valves provide continuous hydraulic damping of dorsi and plantar ankle flexion, the unit being such that, over the major part of the range of damped movement, there is no resilient biasing in either the dorsi or the plantar direction. This confers a number of advantages, including stabilisation of standing, balance control, and improved stair-walking and ramp-walking.

An attachment for a prosthetic foot comprising an attachment surface that couples to the edges of a foot plate of a prosthetic foot and an outer surface that functionally or cosmetically alters the foot plate of the prosthetic foot in order to adapt the prosthetic foot to the needs of the user. In another embodiment, a toe attachment for a prosthetic foot comprising a cavity that can receive the toe end of an elongate foot element of a prosthetic foot, the toe attachment that can functionally or cosmetically alter the elongate foot element in order to adapt the prosthetic foot to the needs of the user. In yet another embodiment, a seal cover that can removably engage a prosthetic foot and a cosmetic cover for a prosthetic foot, resulting in a substantially watertight connection between the seal cover and the prosthesis and the seal cover and the cosmesis.

A prosthetic foot device (1) having a longitudinal direction (L) and a transverse direction (T) and comprising a base spring blade (2), an ankle spring blade (3) being made from a composite material comprising glass fibres and a heel spring blade (4), the base spring blade (2) and the ankle spring blade (3) being connected in a forefoot region (5) of the prosthetic foot device (1), the base spring blade (2) and the heel spring blade (4) being connected in a heel region (7) of the prosthetic foot device and the ankle spring blade (3) and the heel spring blade (4) being connected in an ankle region (9) of the prosthetic foot device.