Patent
1978-12-04
1980-10-07
Frinks, Ronald L.
3 17R, 3 30, A61F 108, A61F 102, A61F 104
Patent
active
042259827
ABSTRACT:
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.
REFERENCES:
patent: 1323444 (1919-12-01), Bowler
patent: 3833941 (1974-09-01), Wagner
patent: 3874004 (1975-04-01), May
patent: 3890650 (1975-06-01), Prahl
patent: 4091472 (1978-05-01), Daher et al.
"An Innovation in Symes Prosthetics," by H. W. Marx, Orthotics & Prosthetics, vol. 23, No. 3, Sep. 1969, pp. 131-138.
"Adding Strength to the Syme Prosthesis," by C. H. Dankmeyer, Jr., et al., Orthotics & Prosthetics, vol. 28, No. 3, pp. 3-7, Sep. 1974.
Ackerman, co-executor by George
by Canada Permanent Trust Co. co-executor
Cochrane Ian W.
Tucker, co-executrix by Mary
Tucker, deceased Frederick R.
Ade Stanley G.
Frinks Ronald L.
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