Prosthetic feet that provide for variable and adjustable stiffness are provided. A foot element can include a tongue portion defined or formed by a slot in the foot element that at least partially separates the tongue portion from a remainder of the foot element. The tongue portion can be operably connected to the remainder of the foot member to increase the stiffness of the foot member or operably disconnected from the remainder of the foot member to increase the flexibility of the foot member. The prosthetic foot further includes a mechanism for adjusting whether the tongue portion is operably connected or disconnected from the remainder of the foot member. The mechanism can be selectively actuated to adjust the stiffness of the foot element in dorsiflexion and/or plantarflexion and/or to adjust the degree to which the tongue portion is allowed to flex relative to the remainder of the foot member.

A prosthetic foot can allow a user to engage in different activity levels, for example, walking and running using the same prosthetic foot. The prosthetic foot can have a generally C-shaped upper foot member coupled to a heel member near a toe portion of the prosthetic foot. The heel member can extend from a toe end to a heel end. The prosthetic foot can include a resilient member that can be split into a first component and a second component. The prosthetic foot can include a heel stiffening mechanism with different configurations to adjust a heel stiffness of the prosthetic foot.

Prosthetic feet and foot covers that provide a more natural appearance and improved performance are provided. A foot element for a prosthetic foot can extend from a heel end to a toe end and include a heel, arch, forefoot, and toe regions. The forefoot region can be wider than the arch and heel regions. The toe region can include a U-shaped cut out to define a big toe. Various features of the foot element can guide rollover of the foot through the big toe during use. A foot cover can be designed to receive a prosthetic foot including such a foot element. The foot cover can have a region of increased flexibility at a transition between the forefoot region and toe region. The foot cover can also have a padded area extending from the heel region across a lateral part of the arch region and forefoot region.

A prosthetic foot comprises an attachment member and two or more flexible members. The attachment member can include a connector configured to connect the attachment member to a user or another prosthetic device. The two or more flexible members can be rotatably attached to the attachment member by rotatable joints such that the flexible members can both rotate and flex relative to the attachment member when the prosthetic foot contacts the ground.

Prosthetic feet and foot covers that provide a more natural appearance and improved performance are provided. A foot element for a prosthetic foot can extend from a heel end to a toe end and include a heel, arch, forefoot, and toe regions. The forefoot region can be wider than the arch and heel regions. The toe region can include a U-shaped cut out to define a big toe. Various features of the foot element can guide rollover of the foot through the big toe during use. A foot cover can be designed to receive a prosthetic foot including such a foot element. The foot cover can have a region of increased flexibility at a transition between the forefoot region and toe region. The foot cover can also have a padded area extending from the heel region across a lateral part of the arch region and forefoot region.

A prosthetic leg and a prosthetic leg connector are provided, which are capable of enhancing the strength of a plate spring while reducing the weight thereof, as well as adjusting an attachment position of a socket with respect to the plate spring. The prosthetic leg comprises a connector and a plate spring. The plate spring includes a grounding portion coming into contact with the ground, a connecting portion connected to the connector, and a curved portion curving between the grounding portion and the connecting portion. The curved portion curves in only one direction, the grounding portion is formed at one end of the curved portion, and the connecting portion is formed at another end of the curved portion, and includes a connecting surface formed on an inside of a curve of the curved portion. The connector includes an attachment surface that is connected to the socket.

A prosthetic lower leg uses one or more generally C-shaped spring elements between the patient's socket and a foot-plate assembly. The respective connections between (a) those one or more elements and (b) that socket and that footplate can be configured to provide a lightweight and economic prosthesis that effectively mimics the feel and performance of a normal human foot. The prosthetic spring element is generally C-shaped, and can have a substantially constant thickness along its length, lending itself to being fabricated by automated processes such as filament winding. One or more of the generally C-shaped spring elements can be incorporated into other prostheses and/or other devices.

Disclosed herein are devices, systems, and methods for accommodating quick and easy exchange of footwear for lower limb amputees. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

A sole which is attached to a ground contact region of an athletic prosthetic leg having a leaf-spring-like leg portion extending to a side of a toe via at least one curved portion, the ground contact region extending in an arc from the toe to a side of the curved portion is provided. The sole includes a bottom surface having a shape conforming to an extending shape of the ground contact region, and the bottom surface has at least one width direction land portion defined by a plurality of width direction grooves extending in a width direction of the sole. Moreover, the width direction land portion includes a chamfer at each of both end edges at border positions, respectively, between a contact patch and both side walls facing the plurality of width direction grooves.

A sole for a prosthetic leg, attached to a ground contact region of the prosthetic leg, includes a bottom surface including: a first inclined surface portion including a first inclined surface inclined such that an amount of recess in a sole thickness direction gradually increases from one to the other sides in a predetermined direction in a planar view; and a second inclined surface portion including a second inclined surface inclined such that the amount of recess in the sole thickness direction gradually increases from the other to the one sides in the predetermined direction in the planar view. The first and second inclined surface portions are mutually connected in a connecting direction crossing the predetermined direction in the planar view, so that a continuous groove in which the first and second inclined surfaces constitute a part of a side wall and which extends in the connecting direction is defined.