A keel for a prosthetic foot comprises a unitary keel body having a longitudinal axis and a length L. The keel body includes a forefoot portion, a heel portion, and an ankle portion extending therebetween. In addition, the keel comprises a first bumper disposed in a first capture cavity in the ankle...http://www.google.es/patents/US8118879?utm_source=gb-gplus-sharePatente US8118879 - Prosthetic foot with flexible ankle portion
