Source: http://www.google.de/patents/US4520511
Timestamp: 2013-05-19 20:28:07
Document Index: 764173097

Matched Legal Cases: ['art 3', 'art 3', 'art 4', 'art 3', 'art 11', 'art 13', 'art 4', 'art 13']

Patent US4520511 - Hip prosthesis with expanding femoral component - Google PatenteSuche Bilder Maps Play YouTube News Gmail Drive Mehr » Erweiterte Patentsuche | Webprotokoll | Anmelden Erweiterte Patentsuche PatenteA hip prosthesis adapted to be fixed in the femoral articulation, with gradual expansion against the wall of the femoral canal by means of a screw, has a top part shaped with a seat for settling the nut of a screw in a lower part which has three outwardly biased longitudinal sectors which are internally...http://www.google.de/patents/US4520511?utm_source=gb-gplus-sharePatent US4520511 - Hip prosthesis with expanding femoral component Ver�ffentlichungsnummerUS4520511 APublikationstypErteilung Anmeldenummer06/403,419 Ver�ffentlichungsdatum4. Juni 1985Eingetragen30. Juli 1982 Priorit�tsdatum26. Okt. 1981Auch ver�ffentlicht unterEP0077868A1 ErfinderParibelli GianezioGodoli NunzioUrspr�nglich Bevollm�chtigterGianezio; ParibelliNunzio; Godoli US-Klassifikation623/22.46606/63Internationale KlassifikationA61F2/00A61F2/36A61F2/30 UnternehmensklassifikationA61F2220/0041A61F2/3662A61F2002/30904A61F2002/30579A61F2002/30434A61F2002/3694A61F2/3609A61F2002/3696A61F2002/30332A61F2002/30405A61F2230/0067A61F2/3676A61F2002/30774A61F2220/0033A61F2002/30217A61F2002/3037A61F2002/3631A61F2002/3652A61F2220/0025 Europ�ische KlassifikationA61F2/36DA61F2/36CReferenzenPatentzitate (8) Referenziert von (86)Externe LinksUSPTO USPTO-Zuordnung EspacenetHip prosthesis with expanding femoral componentUS 4520511 A Zusammenfassung A hip prosthesis adapted to be fixed in the femoral articulation, with gradual expansion against the wall of the femoral canal by means of a screw, has a top part shaped with a seat for settling the nut of a screw in a lower part which has three outwardly biased longitudinal sectors which are internally threaded and held together by the screw. After insertion, unscrewing causes the progressive separation of the three expansion sectors which locks the prosthesis in the femoral or thigh-bone canal. The attachment is strengthened by external circular retaining ridges on the sectors.
What is claimed is: 1. A hip prosthesis comprising: an elongated member adapted for insertion in the femoral canal against the inner surface of the large femoral trocanter having a longitudinal bore and a slanted upper end terminating in an articulation; said upper end being formed with a retaining collar adapted to rest against the median counterfort of the femur; the lower end of the member having a plurality of longitudinal slits defining a plurality of expansible, resilient, unitary, straight, sectors adapted to grip the inner surface of the femoral trocanther; a longitudinal, internally threaded rod with said bore; and, actuating means in said rod for expanding said sectors after insertion of the prosthesis in said femoral canal; said sectors having spaced outwardly extending, peripheral shoulders for locking said prosthesis in place.
FIELD OF THE INVENTION This invention refers to a hip prosthesis to be fixed in the femoral joint, which has a uniform expansion and can be adjusted on the inner wall of a cavity by means of a screw acting on the expandable part.
SUMMARY OF THE INVENTION The invention provides a hip prosthesis comprising an elongated metallic member adapted for insertion in the femoral canal against the inner surface of the large femoral trocanter and which has a slanted upper end terminating in an articulation; the upper end being formed with a retaining collar adapted to rest against the median counterfort of the femur; the lower end of the member having a plurality of longitudinal slits defining expansible, outwardly biased resilient sectors adapted to grip the inner surface of the femoral trocanther; and a longitudinal rod and actuating means in the rod for expanding the sectors after insertion of the prosthesis in the femoral canal.
BRIEF DESCRIPTION OF THE DRAWING In the drawing, FIG. 1 illustrates in non-limiting fashion a preferred embodiment of the invention wherein the prosthesis is shown in front elevational view with its radial sectors expanded.
DISCLOSURE OF BEST MODE OF THE INVENTION This embodiment involves the introduction of the metal or plastic part 3 into cavity 1 of the femoral joint 2. Metal or plastic part 3 has a cone-shaped rod 4 with a lower truncated end. Inside rod 4 is a threaded bore 5 to which is screwed screw 6 operated by a nut 7 fitting in seat 8 which allows lifting part 4. Part 3 can be stabilized on the joint by means of a biased collar 9 which rests on the middle counterfort of the thigh bone 10, while enlarged median part 11 is set in contact with the inside surface 12 of the large femoral trocanther. The cylindrical bottom part 13 has three outwardly biased, resilient longitudinal spaced sectors which expand as part 4 ascends. On the outer wall, part 13 has a system of uninterrupted shoulders 15 to increase its gripping effect. To secure in place, the prosthesis is at first fitted in the femoral canal, and the sectors 14 are expanded by unscrewing screw 6 by acting on the control nut 7 bound in its seat and rotation its circular base 16 only, in seat 8. The prosthesis can be completed with ball 17 on the cylindrical rod 18 threaded by its end 19 in coaxial seat 20.
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Apr. 2004Ramseier, WalterFemoral component for a hip prosthesisDrehenOriginalbildGoogle-Startseite - Sitemap - USPTO-Bulk-Downloads - Datenschutzerkl�rung - Nutzungsbedingungen - �ber Google Patente - Feedback gebenDaten bereitgestellt von IFI CLAIMS Patent Services.© 2012 Google