A prosthetic system includes a prosthetic foot having an upper foot element with a concave-forward facing portion and foot portion extending forwardly therefrom. An intermediate foot element is disposed below the upper foot element and has a front portion coupled to the foot portion of the upper foot element. A lower foot element is disposed below the intermediate foot element. A pump system is coupled to the prosthetic foot and comprises a pump mechanism including a housing defining a cavity, and a membrane situated in the cavity. The pump mechanism is movable between an original configuration and an expanded configuration. An arm member is connected to the pump mechanism and operatively coupled to the intermediate foot element. The arm member is arranged to move the pump mechanism toward at least the expanded configuration upon movement of the intermediate foot element relative to the upper foot element.

The present disclosure pertains to prosthetic systems that encompass a prosthetic foot and a pump mechanism devised to eliminate fluid between a prosthetic socket and a residual limb or liner, thereby sustaining a hypobaric pressure chamber within a cavity of the prosthetic socket. The pump mechanism may incorporate a fluid chamber established between a membrane and the housing of the pump mechanism. Forces resulting from the user's gait during the compression and expansion of the prosthetic foot can be transmitted to an L-brace, which is configured to actuate the membrane of the pump mechanism, facilitating the influx and efflux of fluid into and from the fluid chamber.

A prosthetic foot includes a base spring, a top spring assembly, a connector assembly, and a heel cushion. The top spring assembly includes first and second spring members, and first and second bond connections. The second spring member extends parallel with and spaced apart from the first spring member. The first bond connection is between distal ends of the first and second spring members, and the second bond connection is between a distal end of the second spring member and a top surface of the base spring. The top spring assembly has a first portion arranged horizontally, and a second portion arranged vertically. The connector is connected to a proximal end of the top spring assembly to connect the prosthetic foot to a lower limb prosthesis. The heel cushion is mounted to the base spring at a location spaced forward of a heel end of the base spring.

A composite prosthetic foot assembly comprising a composite foot plate, a composite shank plate, and a composite attachment structure. The composite attachment structure attaches the shank plate to the foot plate and includes a portion configured to extend transversely through at least the foot plate and the shank plate. The composite attachment structure is made of a plurality of elongated fibers surrounded by a resin material, and has a first end portion and a second end portion, with at least a portion of the plurality of elongated fibers configured to extend continuously through the shank plate and the foot plate, with the first end disposed within a first recess formed in the foot plate and the second end disposed within a second recess formed in the shank plate. A composite prosthetic foot assembly comprising a heel plate, a shank plate, and composite attachment structure attaching the two is also disclosed.

A prosthetic foot having a base spring having a toe end portion and a heel end portion, and a top spring assembly. The top spring assembly includes a first spring member having a distal end and a proximal end, a second spring member spaced apart from the first spring member along substantially an entire length of the first spring member, the second spring member having a distal end and a proximal end, a first bond connection provided between the distal ends of the first and second spring members, a second bond connection provided between the distal end of the second spring member and a top surface of the base spring in a forefoot portion of the base spring, and a spring connector extending through at least a first hole formed in the base spring, the second bond connection and the second spring member.