Transtibial socket for external prosthesis

Details Transtibial socket for external prosthesis Transtibial socket for external prosthesis

2007-11-30

2011-12-13

Snow, Bruce E (Department: 3738)

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

Leg

Socket holder

Reexamination Certificate

active

08075632

ABSTRACT:
A prosthetic hard socket has a modified curvature and/or shape, which eliminates or de-emphasizes the patellar bar to eliminate or reduce pressure on the wearer's patellar tendon, and, instead, enhances support of the anterior tibial condyle and/or tibial tubercle. Thus, the preferred socket is designed with the patellar tendon preferably not being weight-bearing. The preferred curvature and/or shape comprises a lowered socket edge and/or a gap in the socket wall in the region of the patellar tendon, so that the hard structure of the socket does not directly support or press upon the patellar tendon. The invented socket may include inwardly-protruding regions on each side of the lowered edge/gap, for helping to “capture” or otherwise press on a portion of the tibia for improved rotational control. This combination of shapes and curvatures provides for improved rotational control, comfort, and range of motion including even full extension or hyperextension. A flexible and/or cushioning member may be placed in the gap/trough (that is caused by the lowered edge or removed wall portion), for example, a fabric, leather, rubber, or other member may be attached to the socket to across a V-shaped trough of the lowered edge of the hard socket.

REFERENCES:
patent: 6334876 (2002-01-01), Perkins
patent: 2005/0278039 (2005-12-01), Nobbe
Picken, Robert R., “The Below-Knee Prosthesis,” Lower Extremity Amputation, Second Edition,1992, pp. 31-32, Rehabilitation Institute of Chicago, USA.
“Chapter 4:Components,” Orthotics Prosthetics Program, 1998, pp. 4 1-4, University of Texas Health Science Center of Dallas, USA.
Excerpt from:Lower limb Prosthetics Manual,1982 Revision, pp. 107, 113-114, 119-120, S73, S79, New York University Medical Center, USA.

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