Dampener for a bearing arthro-prothesis

Details Dampener for a bearing arthro-prothesis Dampener for a bearing arthro-prothesis

1987-06-12

1989-03-21

Frinks, Ronald L.

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

Implantable prosthesis

Bone

623 18, A61F 232, A61F 230

Patent

active

048139610

ABSTRACT:
Dampener for a bearing arthro-prosthesis made up of a cradle (1) with a base zone of spherical shape to be interposed between the presser, head (3,2) and the cotyle (4) of the prosthesis, which has stepped cross-section, in the meridian plane, with a thin wall (10), a first central step (11) rising from the bottom of the cradle and more circumferential spaced apart steps (12) being parallel to and coaxial with the central step (11) and having lesser height than the first step. In this way, it is possible to obtain, with a non-compressible material, a variable rigidity of the cradle when subjected to loads applied to the prosthesis as well as maximum deformation increment at the lowest values of the load (approx. 100 kg).

REFERENCES:
patent: 3818512 (1974-06-01), Shersher
patent: 3916451 (1975-11-01), Buechel et al.
patent: 3938198 (1976-02-01), Kahn et al.
patent: 4262369 (1981-04-01), Roux
patent: 4314381 (1982-02-01), Koeneman

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