Prosthetic pylon having an enclosed compressible volume of fluid

Details Prosthetic pylon having an enclosed compressible volume of fluid Prosthetic pylon having an enclosed compressible volume of fluid

1995-09-12

1997-12-30

Willse, David H.

Prosthesis (i.e., artificial body members), parts thereof, or ai

Leg

623 35, A61F 260

Patent

active

057024880

ABSTRACT:
A pylon includes a first end portion connected to a patient's leg stump and a second end portion connected to a prosthetic foot. The second end portion includes a piston, and the first end portion includes a piston chamber receiving the piston. The second end portion is thus rotatable and axially movable relative to the first end portion about and along a longitudinal axis of the pylon, respectively. The piston chamber encloses a compressible volume of fluid through which substantially all of the patient's weight applied through the patient's leg stump is supported. The compressible volume of fluid is sealed so that it can be pressurized. Also, a torsional spring couples the piston and piston chamber and resists relative rotation between the piston and piston chamber without supporting any substantial portion of the patient's weight applied through the patient's leg stump to the piston. The present invention thus advantageously provides a pylon which is more cushioned and resilient than conventional pylons.

REFERENCES:
patent: 4038705 (1977-08-01), Owens et al.
patent: 5217500 (1993-06-01), Phillips
patent: 5376138 (1994-12-01), Bouchard et al.
patent: 5405409 (1995-04-01), Knoth
patent: 5458656 (1995-10-01), Phillips
"The Science of Nature" brochure for product Re-Flex VSP.TM., Flex-Foot Inc., Aliso Viejo, California, no date.

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