Pump system

A pump system arranged to be connected to a prosthetic foot and a prosthetic socket, the pump system comprising:

• a pump mechanism including a housing defining a cavity and a membrane situated in the cavity, the pump mechanism being movable between an original configuration in which the volume of a fluid chamber defined between the membrane and a bottom of the cavity is zero or near-zero, and an expanded configuration in which the volume of the fluid chamber is increased, the pump mechanism arranged for fluid communication with the prosthetic socket;
• and
• an arm member extending from the pump mechanism and arranged to move the pump mechanism toward the expanded configuration upon engagement with the prosthetic foot and movement of the prosthetic foot;
• wherein the pump system is arranged to be placed a distance from the prosthetic foot and said distance is adjustable to vary sensitivity of the pump mechanism;
• wherein the arm member has an elongate member defined by the housing and arranged to extend downwardly toward the prosthetic foot;
• wherein the pump mechanism includes a closure-assist mechanism arranged to bias the pump mechanism toward the original configuration;
• wherein the closure-assist mechanism comprises a closure element having one or more magnetic materials.

A prosthetic system comprising:

• a prosthetic foot including an upper foot element having a concave-forward facing portion and a foot portion extending forwardly therefrom, an intermediate foot element disposed below the upper foot element and having a front portion coupled to the foot portion of the upper foot element, and a lower foot element disposed below the intermediate foot element, wherein the upper foot element and the intermediate foot element are movable relative to one another upon movement of the prosthetic foot;
• and
• a pump system coupled to the prosthetic foot and comprising:
• a pump mechanism including a housing defining a cavity and a membrane situated in the cavity, the pump mechanism being movable between an original configuration in which the volume of a fluid chamber defined between the membrane and a bottom of the cavity is zero or near-zero, and an expanded configuration in which the volume of the fluid chamber is increased;
• and
• an arm member extending from the pump mechanism and operatively coupled to the intermediate foot element, the arm member 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;
• wherein the pump mechanism includes a closure-assist mechanism arranged to bias the pump mechanism toward the original configuration;
• an ankle portion rotatably attached to the upper foot element;
• and
• a connection unit connected to a rear portion of the ankle portion and a rear end portion of the intermediate foot element, the connection unit being arranged to move the upper and intermediate foot elements relative to one another.