Abstract: The invention provides a prosthetic foot device including an elongated upper forefoot portion extending through an upper attachment section, forwardly through an arch section, and to a toe section positioned at a toe location of a natural foot. The foot device also includes an elongated lower forefoot portion extending through an upper attachment section attached to the attachment section of the upper forefoot portion, and forwardly under the arch section of the upper forefoot portion to a terminal end positioned under the ball location of a natural foot and rearward of the toe section of the upper forefoot portion.

Abstract: A prosthetic foot includes a rod having a substantially spherical head and a shank extending from the head. A connector is pivotally coupled to the spherical head of the rod. The connector has a coupling configured to attach to the stump of an amputee. A wear plate is disposed on the shank of the rod adjacent the connector. The wear plate is sized and shaped to contact the connector as the connector pivots on the spherical head of the rod. A spring is removably disposed on the shank of the rod and spaced apart from the wear plate a predetermined distance. The spring is compressible by the rod when the rod is disposed in a prosthetic foot and an axial load is applied to the rod.

Abstract: An ankle foot orthotic foot brace device includes a primary elongated resistance member attached to and extending from a base disposable under a user's foot. The primary resistance member includes means for attachment to the user's leg, and is deflectable through a deflection range and resilient or elastic to provide an initial resistant force to pivoting of the user's foot with respect to user's leg. A secondary elongated resistance member is engagable by the primary resistance member within a subsequent or distal portion of the deflection range of the primary resistance member. Also included is means for intercoupling the secondary resistance member to the primary resistance member during the subsequent portion of the deflection range of the primary resistance member.

Abstract: A prosthetic foot includes an elongated foot member, extending between a toe section positioned at a toe location of a natural foot and a heel section positioned at a heel location of a natural foot. The elongated foot member also extends through an elevated arch section positioned between the toe section and heel section at an approximate arch location of a natural foot. An arch block is disposed below the elongated foot member under the elevated arch section. The arch block is sized and shaped to substantially fill a space or volume under the arch section. The arch block has geometric and physical properties that facilitate medial to lateral rotation to the prosthetic foot.

Abstract: A prosthetic foot device with variable stiffness response includes a variable energy transfer mechanism disposed between first and second foot members to transfer a variable amount of energy between the members during use. A chamber is associated with one of the first and second foot members, and a piston is associated with another of the first and second foot members and is movable in the chamber. At least one aperture is formed between the piston and the chamber. A variable viscosity fluid is disposed in the chamber and displaceable through the at least one aperture between the piston and the chamber to allow fluid to flow within the chamber between opposite sides of the piston. The variable viscosity fluid has a viscosity that is variable to vary an ability of the variable viscosity fluid to flow through the at least one aperture.

Abstract: A prosthetic knee provides a single axis of rotation and includes a hydraulic damping cylinder, a microprocessor, and sensors. Based on input from the sensors, the microprocessor selects a flow path within the hydraulic cylinder in order to provide the proper amount of knee resistance to bending for a given situation. The resistance of each flow path within the hydraulic cylinder is manually preset. Changes in gait speed are accommodated by employing a hydraulic damper with intelligently designed position sensitive damping. Moreover, the knee need not be un-weighted to transition from the stance phase to the swing phase of gait. As a result, the knee safely provides a natural, energy efficient gait over a range of terrains and gait speeds and is simpler, less costly, and lighter weight than the prior art.

Abstract: A foot plate for a prosthetic foot includes a sole plate and a layer with laterally variable stiffness disposed above the sole plate. The layer has a medial portion and a lateral portion. The lateral portion has a stiffness different than a stiffness of the medial portion, such as a greater stiffness to provide a relatively softer instep and a relatively stiffer out-step.

Abstract: A prosthetic foot device with variable stiffness response includes a variable energy transfer mechanism disposed between first and second foot members to transfer a variable amount of energy between the members during use. A chamber is associated with one of the first and second foot members, and a piston is associated with another of the first and second foot members and is movable in the chamber. At least one aperture is formed through the piston and in communication with the chamber. A variable viscosity fluid is disposed in the enclosure and displacable through the at least one aperture in the piston. The variable viscosity fluid has a viscosity that is variable to vary an ability of the variable viscosity fluid to flow through the at least one aperture.

Abstract: A prosthetic foot with an adjustable ankle includes an upper portion coupled to a socket of an amputee. A lower portion is adjustably coupled to the upper portion, and is attached to a foot member with heel and toe sections. A movable coupling is disposed between the upper and lower portions, and includes a displacement member slidably coupled to a displacement track. The movable coupling allows the toe section to pivot downward and the heel section to simultaneously displace forward. The adjustable ankle can be adjusted with an actuator coupled to a tractor bolt coupled between the upper and lower portions. A sensor is associated with the upper portion or the lower portion to sense frequency of contact, force of contact, or orientation of the upper portion or the lower portion, and to output a corresponding output signal.

Abstract: A prosthetic foot with an adjustable ankle includes an upper portion coupled to a socket of an amputee. A lower portion is adjustably coupled to the upper portion, and is attached to a foot member with heel and toe sections. A movable coupling is disposed between the upper and lower portions, and includes a displacement member slidably coupled to a displacement track. The movable coupling allows the toe section to pivot downward and the heel section to simultaneously displace forward. The adjustable ankle can be adjusted with a motor coupled to a tractor bolt coupled between the upper and lower portions. A level sensor can sense the orientation of the upper portion and send a signal to operate the motor to vertically orient the upper portion or level the foot.

Abstract: A prosthetic foot device includes an elongated upper forefoot portion, an ankle portion, and a lower footplate. The forefoot portion can extend rearwardly through an upper attachment section, downwardly through an ankle section, forwardly through an arch section, and to a toe section. The ankle portion can attach to the forefoot portion, and can extend rearwardly through an upper attachment section, downwardly through an ankle section, forwardly under the ankle section of the forefoot portion, and rearwardly to a heel section, in a substantial s-shaped profile. The lower footplate is disposed under the ankle and forefoot portions, and can extend through a heel section, an arch section, and to a toe section. The upper forefoot portion, the ankle portion, and the lower footplate are flexible to store energy and resilient to return energy.