Prosthetic foot having a low profile cantilever spring keel

Details Prosthetic foot having a low profile cantilever spring keel Prosthetic foot having a low profile cantilever spring keel

A - Human Necessities

61

F

3/140

A61F 2/66 (2006.01)

Patent

CA 2014250

A prosthetic foot (10) includes a viscoelastic cantilever spring keel (12) encased in foamed polymer cover (14) shaped to resemble a human foot. The keel (12) includes an attachment flange (16) for connecting the keel to an upper prosthesis at a location generally corresponding to the location of the ankle joint of a human foot. The keel (12) also includes a forefoot portion in the form of a singular beam (22) cantilevered forwardly and diagonally downwardly from the mounting flange (16). The beam (22) is composed of a primary section (50) extending forwardly from the attachment flange (16) and a forward portion (48) having a significantly lower spring rate and, thus, substantially more compliant than the adjacent portions of the beam primary section (50).

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