Power plants
Patent
1983-11-21
1985-06-25
Apley, Richard J.
Power plants
128 92C, 128 92CA, A61F 104
Patent
active
045244677
ABSTRACT:
A ball and socket joint for implanting in the body is provided which comprises (1) a ball; (2) a cup with a spherical cavity, said cup to be affixed to bone; (3) a projection associated with the cup and extending into the spherical cavity at the geometric pole of the cavity; and (4) a bearing member surrounding a portion of the ball and rotatable within said spherical cavity, said bearing member including a walled aperture for receiving the projection, the rotation of the bearing within the cavity being constrained by engagement of a wall of the aperture with the projection.
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patent: Re28895 (1976-07-01), Noiles
patent: 3903549 (1975-09-01), Deyerle
patent: 3996625 (1976-12-01), Noiles
patent: 4004300 (1977-01-01), English
patent: 4040130 (1977-08-01), Laure
patent: 4150444 (1975-04-01), Hagert
patent: 4279041 (1981-07-01), Buchholtz
R. Woo, et al., "Dislocations after Total Hip Arthroplasty", The Journal of Bone and Joint Surgery, vol. 64-A, Dec. 1982, pp. 1295-1306.
T. Baumeister and L. Marks, Mechanical Engineers Handbook, McGraw-Hill, New York, pp. 8-48, 1958.
Apley Richard J.
Isabella David J.
Joint Medical Products Corp.
Klee Maurice M.
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