Artificial hip joint socket with hydraulic head support

Details Artificial hip joint socket with hydraulic head support Artificial hip joint socket with hydraulic head support

1988-02-29

1989-06-20

Frinks, Ronald L.

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

Implantable prosthesis

Bone

A61F 232

Patent

active

048406317

ABSTRACT:
A liquid chamber (3) arranged in the bottom of the socket cavity (2) is latitudinally sealed by the engaging ball head (4) of the femoral prosthesis shaft. The ball head (4) of the hip joint prosthesis is supported hydrostatically by the liquid chamber (3) filled with synovia and sealed by the ball head following a deformation of the elastic sealing edge (5). By means of the hydrostatic support, the friction moment increases only a little when the load becomes higher and approaches a constant value which is considerably lower than in conventional hip joint sockets.

REFERENCES:
patent: 3864758 (1975-02-01), Yakich
patent: 4031570 (1977-06-01), Frey
patent: 4676799 (1987-06-01), Legrand

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