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OwnerIan W. Cochrane, Frederick R. Tucker, deceased +3inventors
InventorsIan W. Cochrane, Frederick R. Tucker, deceased, by Mary Tucker, co-executrix, by George Ackerman, co-executor, by Canada Permanent Trust Co., co-executor
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A flexible precast foot comprises a hollow flexible slipper member which has a rounded heel contour and a keel cavity. The resiliency of the rounded heel is controlled by the type of foam used in order that the compressibility of the heel may be varied during construction. A stump support is custom manufactured from reinforced plastic and the like, from a negative plaster mold and comprises an elongated socket with fenestrations being provided on each side to facilitate the engagement and disengagement of the stump. The negative socket mold is formed by a strip casting plaster technique and the finished positive stump socket is then fitted to the foot and secured to a strip of belting or similar material which extends into the keel cavity. This cavity is filled with "Flexane" rubber or any suitable elastomeric material such as nonfoaming urethane, synthetic rubber which also molds around the distal end of the stump socket. The length of belting together with the elastomeric material filling the keel cavity, controls the toe break of the finished prosthesis.
A Syme foot prosthesis comprising in combination a precast foot including a keel cavity and a custom formed stump socket engaged within the opening of the foot, said socket including a distal cup portion, an elastomeric material filling said keel cavity and means securing the distal end of said stump socket within said opening and to said elastomeric material filling said heel cavity.
A Syme foot prosthesis for use with a stump socket, comprising in combination a slipper type outer shell formed of elastomeric material and defining a keel cavity, said shell including a sole portion, an upper vamp portion, a rounded heel portion, a front extension extending upwardly from said vamp portion and a rear extension extending up from the rear of said heel portion, side gores around the ankle area of the heel portion sweeping downwardly on each side between said front and rear extensions thereby defining a stump socket opening, an elastomeric material filling said keel cavity and means to secure the associated stump socket within the stump socket opening of the slipper.
Dependencies are inferred from the claim text.