Artificial foot

An artificial foot adapted for insertion in a conventional shoe comprising in combination:

• a channel shaped sole plate insertable in the bottom portions of a shoe and having laterally spaced upstanding wall portions, a toe simulator element having its rear portion horizontally pivoted to said bottom plate side walls, upstanding plate means for simulating the ankle portions of a foot, means on said upstanding plate means for contacting the inner heel portions of the shoe, longitudinally adjustable means for connecting said upstanding plate means to said sole plate, thereby permitting length adjustment of the artificial foot, a leg force receiving plate secured to the top portions of said upstanding plate means, a prosthesis attachable to the leg stump and having a bottom plate disposed in generally parallel, overlying relation to said leg force receiving plate, resilient cushion means interconnecting said plates but permitting limited pivotal movement of said prosthesis plate relative to said leg force receiving plate as a consequence of walking movement of the leg stump, a spring-pressed linkage operable between said sole plate and said toe simulator to resiliently urge said toe simulator to a generally aligned position relative to said sole plate, latching means normally securing said linkage against movement, and means responsive to the pivotal movement of said prosthesis plate relative to said leg force receiving plate as the shoe strikes the ground in a step for initially releasing said latching means to permit pivotal movement of said toe simulator to said aligned position and subsequently latching said linkage in an upward position of said toe simulator as the step progresses.

An artificial foot adapted for insertion in a conventional shoe comprising in combination:

• a channel shaped sole plate insertable in the bottom portions of a shoe and having laterally spaced upstanding wall portions, a generally U-shaped toe simulator having its rear portion horizontally pivoted to said upstanding wall portions, a pair of laterally spaced, vertical side plates rigidly interconnected at their rear by a transverse plate portion, means on said transverse plate portion for contacting the inner heel portions of the shoe, longitudinally adjustable means for connecting said side plates to said sole plate, thereby permitting length adjustment of the artificial foot, a leg force receiving plate secured to the top portions of said side plates, a prosthesis attachable to the leg stump and having a bottom plate disposed in generally parallel, overlying relation to said leg force receiving plate, resilient cushion means interconnecting said plates but permitting limited pivotal movement of said prosthesis plate relative to said leg force receiving plate as a consequence of walking movement of the leg stump, a spring-pressed linkage operable between said sole plate and said toe simulator to resiliently urge said toe simulator to a generally aligned position relative to said sole plate, latching means normally securing said linkage against movement, and means responsive to the pivotal movement of said prosthesis plate relative to said leg force receiving plate as the shoe strikes the ground in a step for initially releasing said latching means to permit pivotal movement of said toe simulator to said aligned position and subsequently latching said linkage in an upward position of said toe simulator as the step progresses.

An artificial foot adapted for insertion in a conventional shoe comprising in combination:

• a channel shaped sole plate insertable in the bottom portions of a shoe and having laterally spaced upstanding wall portions, a generally U-shaped toe simulator having its rear portion horizontally pivoted to said upstanding wall portions, a pair of laterally spaced, vertical side plates rigidly interconnected at their rear by a transverse plate portion, means on said transverse plate portion for contacting the inner heel portions of the shoe, longitudinally adjustable means for connecting said side plates to said sole plate, thereby permitting length adjustment of the artificial foot, a transversely curved plate simulating the instep surface of the foot, means for supporting said instep plate in overlying relation to said sole plate, a leg force receiving plate secured to the top portions of said side plates, a prosthesis attachable to the leg stump and having a bottom plate disposed in generally parallel, overlying relation to said leg force receiving plate, resilient cushion means interconnecting said plates but permitting limited pivotal movement of said prosthesis plate relative to said leg force receiving plate as a consequence of walking movement of the leg stump, a spring-pressed linkage operable between said sole plate and said toe simulator to resiliently urge said toe simulator to a generally aligned position relative to said sole plate, latching means normally securing said linkage against movement, and means responsive to the pivotal movement of said prosthesis plate relative to said leg force receiving plate as the shoe strikes the ground in a step for initially releasing said latching means to permit pivotal movement of said toe simulator to said aligned position and subsequently latching said linkage in an upward position of said toe simulator as the step progresses.