Dual leaf spring strut system

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

Patent

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Details

623 38, 623 50, 623 52, A61F 260

Patent

active

055099360

ABSTRACT:
A lower leg prosthetic assembly having an anterior and posterior components, comprising curved linear leaf springs extending along substantially the length of the assembly, each spring bowed away from one another along substantially their mid-length. There is further provided a wedge member for engaging the lower end of each spring while in position in a prosthetic foot, and wedgingly securing the anterior and posterior springs to a prosthetic foot member, for allowing increased rotation at the ankle joint. Further the upper ends of the leaf springs may be secured to the upper portion of the assembly with a wedge member, wedgingly securing the springs to the upper member, or attached to a socket member, both types of attachments for decreasing rotation at the knee joint. There may be further provided an achilles strap extending along the posterior spring for offering additional vertical loading without increased elongation of the rear spring.

REFERENCES:
patent: 49529 (1865-08-01), Jewett
patent: 312396 (1885-02-01), Spring
patent: 875482 (1907-03-01), Wyatt
patent: 1035760 (1911-10-01), Walton
patent: 2241481 (1939-08-01), Schroeder
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patent: 5165125 (1992-11-01), Callaway
patent: 5217500 (1993-06-01), Phillips
patent: 5341829 (1994-08-01), Hsiao et al.
"Walking Members for Bilateral Amputation of Thigh" Apr. 1933, J. Bone & Joint Surg.

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