Otto Bock Healthcare Gmbh

Crp, Inc.

David J Wall

Eric Rubie

Nathan A Williams

John B Merlette

Bret J Geilman

Larry J Hansen

Eric W Rubie

Sarah McCarvill

James R Brueggemann

A foot prosthesis having improved rollover and stability. The prosthesis includes a first plate and a mounting block having a mounting portion configured to be coupled to a user of the prosthesis, an attachment portion and a gap portion, with the mounting block attached to the first plate at the attachment portion with a gap between the mounting block gap portion and the first plate. Also included is a resilient element positioned at least partially within the gap, the resilient element configured generally to dissipate stress in the first plate and control deflection between the first plate and the mounting block. The mounting block may be substantially rigid with the area of the first plate attached to the mounting block becoming substantially rigid while the remainder of the first plate is at least partially flexible. The resilient element may be interchangeable to adjust performance of the prosthesis.

Lower leg prosthesis with improved roll over

An improved lower leg prosthesis is disclosed for providing an improved performance, including improved stability and improved multi-axial compliance. The prosthesis includes a two-part lower foot plate, incorporating a forefoot plate and a heel plate, and an upper foot plate that is attached to the forefoot and heel plates by a two-part intermediate elastomeric layer. Forming the lower foot plate and the elastomeric layer each in two parts ensures that the forefoot plate and heel plate function substantially independently of each other, which leads to substantially improved cushioning at heel strike and to improved stability throughout the gait cycle.

Lower leg prosthesis

An improved lower leg prosthesis is disclosed that, during use, provides an improved dynamic feel at heel strike and that provides improved inversion/eversion compliance. The prosthesis includes an elongated pylon having an upper, generally vertical section and a lower, forwardly oriented foot section, and it further includes a generally horizontally oriented foot plate disposed beneath the pylon and including a heel section projecting a substantial distance rearwardly of a vertical pylon axis. An elastomeric layer is interposed between the pylon and the foot plate, extending along substantially the entire length of the heel section of the foot plate, for attaching the pylon and foot plate together. During use of the prosthesis, at heel strike, upward deflection of the foot plate's heel section is limited in substantial part both by the stiffness of the heel section, itself, and by compression of the portion of the elastomeric layer disposed rearwardly of the vertical pylon axis.

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Sandy, UT, United States of America

David J Wall