Patent ID: 8500825
Filing Date: 2013-08-06
Classification: A61F

Abstract:
1. A prosthetic foot device, comprising: a) an attachment member configured to be coupled to a stump of an amputee; b) a forefoot stop coupled to the attachment member at a rear attachment end and having a free forward stop end cantilevered forwardly from the rear attachment end; c) an elongate forefoot spring having a rear spring attachment end coupled to the attachment member and extending to a toe end positioned at a toe location of a natural foot, the forefoot spring including a resilient material and bendable to store energy in the forefoot spring when deflected and return the energy from the forefoot spring when released; d) the forefoot stop being spaced above the forefoot spring, the forefoot spring being bendable into a space between the forefoot spring and the forefoot stop under normal use conditions, and the forefoot spring being bendable to abut to the forefoot stop under extreme use conditions; e) a forefoot bumper disposed between and compressible between the rear spring attachment end of the forefoot spring and the rear attachment end of the forefoot stop, the forefoot bumper including a flexible and resilient material and storing energy in the forefoot bumper when compressed and releasing the energy from the forefoot bumper when released; f) a heel spring having a front attachment end coupled to the rear spring attachment end of the forefoot spring and coupled to the attachment member and extending to a heel end positioned at a heel location of a natural foot, the heel spring including a resilient material and bendable to store energy in the heel spring when deflected and return the energy from the heel spring when released; g) a heel bumper disposed between and compressible between the attachment ends of the forefoot and heel springs, the heel bumper including a flexible and resilient material and storing energy in the heel bumper when compressed and releasing the energy from the heel bumper when released; h) the heel spring bending and the heel bumper compressing upon heel strike during use; and the forefoot spring bending and the forefoot bumper compressing during toe-off; i) a fastener coupling the heel spring the forefoot spring to the attachment member, the fastener extending through the front attachment end of the heel spring, through the heel bumper, through the rear spring attachment end of the forefoot spring, through the forefoot bumper, through the rear attachment end of the forefoot stop, and into the attachment member.