The Ohio Willow Wood Company

Jeffrey L Doddroe

James M Colvin

Lonnie LaVern Nolt

Robert E Arbogast

James W Capper

Charles R Flora

Sujatha Srinivasan

Larry Gail Rowe, Jr

Christopher T Kelley

Jeffrey A Denune

A stable shock absorbing prosthetic foot that transfers energy between heel strike and toe-off. A toe plate is separated from one or more other plates by a bumper assembly located at each of the toe end and heel end of the foot. Certain embodiments of the shock absorbing foot of the present invention are designed for use with a prosthetic ankle. A torsion adapter may also be used to attach a prosthetic foot of the present invention to the remainder of a prosthesis.

Prosthetic foot

Various embodiments of a system and method for sealing a prosthetic socket are disclosed. One example socket sealing system may comprise: a prosthetic socket having a proximal end, an expanded section, and an internal peripheral shoulder; a brim seal having an inner proximal end, an outer proximal end, and a distal end; a removable brim having a distal end; a liner; and a wicking sock; wherein prosthetic socket may be oriented radially outwardly of the outer proximal end of the brim seal, the outer proximal end of the brim seal may be oriented radially outwardly of the removable brim, the removable brim may be oriented radially outwardly of the inner proximal end of the brim seal, the inner proximal end of the brim seal may be oriented radially outwardly of the wicking sock, and the wicking sock may be oriented radially outwardly of the liner; and wherein the brim seal may be reflected about the distal end of the removable brim.

System and method for sealing prosthetic socket

A controlled-stretch prosthetic liner comprising a polymeric material covered with at least a stretch-controlling fabric. Certain liner types, such as below knee (BK) liners, may also include a panel of more stretchable fabric so as to prevent any interference with knee flexion. The polymeric material of the liner may also be used to control liner stretch, such as by adding Kevlar pulp or other materials that increase the strength and reduce the elasticity of the polymeric material and/or by reducing the amount of plasticizer(s) present therein. The stretch-controlling fabric, possibly in conjunction with the polymeric material, acts to limit the longitudinal stretch of the liner while not adversely affecting the radial stretch thereof.

Polymeric prosthetic liner with controlled stretch characteristics

A multi-axis prosthetic ankle having an adjustable range of articulation and a method of adjusting the range of articulation of such an ankle. A lower leg connection component extends from the receiving cavity of a prosthetic foot connection component. The remainder of the receiving cavity is substantially filled with an elastomeric material. An interchangeable external bearing resides atop a portion of the elastomeric material and includes an aperture through which a portion of the lower leg connection component passes. By exchanging an installed external bearing for an external bearing having an aperture of different size, the limits of movement of the lower leg connection component can be altered and the overall range of articulation of the ankle adjusted.

Adjustable multi-axis prosthetic ankle and method of use thereof

A multi-axis prosthetic ankle for connection of a prosthetic lower leg to a prosthetic foot. A substantially hollow prosthetic foot connection component includes a receiving cavity for receiving a portion of a lower leg connection component. A retainer or retainer assembly is preferably installed into the receiving cavity to help retain the lower leg connection component therein. Once the necessary components are in place, the remainder of the receiving cavity is substantially filled with an elastomeric material. An external bearing may reside atop the elastomeric material and act in conjunction with the elastomeric material to control ankle flexion.

Multi-axis prosthetic ankle

A multi-axis prosthetic ankle for connection of a prosthetic lower leg to a prosthetic foot. In one embodiment, a prosthetic foot connection component is connected to a prosthetic lower leg connection component only by means of an elastomeric material, thereby allowing for multi-axis movement of the ankle without requiring direct contact between the two components. In other embodiments of the ankle, a prosthetic foot connection component may be mechanically connected to a prosthetic lower leg connection component. However, the design of the mechanical connection and the use of an elastomeric material casing allows for movement of the ankle without surface-to-surface sliding contact between the two components. Compression of the elastomeric material, as well as one or more mechanical stops may be used to control and limit movement of the ankle.

Multi-axis prosthetic ankle joint

A prosthetic foot includes an adapter element securable to a residual limb, a foot plate having a heel portion and a toe portion along the length thereof, at least one toe spring connected between the adapter element and the toe portion of the foot plate, and a heel spring connected between the adapter element and the heel portion. The heel spring may be a leaf spring or a tube type shock absorber. The concave side of the leaf spring exhibits a plurality of transverse ribs. Alternatively, a tubular pylon may have a collar mounted thereon for movement along the length of the pylon. A toe spring and a heel spring extend from the collar to form toe and heel portions of the prosthetic foot. A further heel spring is connected between the heel portion and another end of the pylon, and a non-extensible band extends between the heel portion and the collar. As another alternative, a tubular pylon has one end securable to a residual limb, and a collar is mounted to the pylon for movement along the length of the pylon. At least one toe spring is connected between the collar and the toe portion of a foot plate, while a heel spring is connected between the heel portion of the foot plate and another end of the pylon.

Prosthetic foot having shock absorption

A prosthetic attachment locking assembly includes a distal adaptor fittable in the bottom of a socket for a residual limb stump and has an upper surface configured to accept an end of a stump liner. The internal surface of the socket merges smoothly with the upper surface of the distal adaptor. The distal adaptor has a pin bore through which a lock pin of the stump liner may extend, and a lower surface having a plurality of projections. A lock body of a prosthetic attachment lock has a pinion gear engagable with the lock pin to lock the lock pin, and an upper surface matably engagable with the projections such that the lock body and the distal adaptor may be connected via the projections and the upper surface of the lock body. The pinion gear is mounted to a centering axle. A one-way clutch for the pinion gear incorporates a sleeve non-rotatably mounting the centering axle such that the centering axle does not bind when it is pressed to move longitudinally. The centering axle is thus movable against a biasing force of a spring to disengage the gear from the lock pin.

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Washington Court House, OH, United States of America

Jeffrey L Doddroe