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    Femoral prosthesis for total hip replacement
    5.
    发明授权
    Femoral prosthesis for total hip replacement 失效
    股骨假体全髋关节置换术

    公开(公告)号：US4778475A

    公开(公告)日：1988-10-18

    申请号：US120737

    申请日：1987-11-10

    Applicant: Chitranjan S. Ranawat ,  Albert H. Burstein ,  Donald L. Bartel

    Inventor： Chitranjan S. Ranawat ,  Albert H. Burstein ,  Donald L. Bartel

    IPC: A61F2/00 ,  A61F2/30 ,  A61F2/36 ,  A61F2/32

    CPC classification number: A61F2/3662 ,  A61F2/367 ,  A61F2/3676 ,  A61F2002/30112 ,  A61F2002/30153 ,  A61F2002/30154 ,  A61F2002/30158 ,  A61F2002/30187 ,  A61F2002/30322 ,  A61F2002/30952 ,  A61F2230/0004 ,  A61F2230/0019 ,  A61F2230/0021 ,  A61F2230/0026 ,  A61F2230/0034 ,  A61F2250/0026 ,  A61F2310/00023

    Abstract: A femoral component for a hip joint prosthesis comprises a proximal portion adapted to be received in the intertrochanteric region of a femur, a neck portion extending obliquely medially, anteriorly and superiorly from the proximal portion and adapted to be joined to a femoral head element, and a stem portion smoothly merging with and extending inferiorly from the proximal portion. The proximal portion has anterior and prosterior aspects that converge medially and inferiorly and intersect a rounded medial aspect oriented obliquely to the stem portion both anteriorly and medially, said aspects defining a generally wedge-shaped body adapted to engage the endosteal surfaces of the femur in the intertrochanteric region such that substantially all loads are transmitted from the component to the bone in the intertrochanteric region and load transfers through other surfaces are minimized.

    Abstract translation: 用于髋关节假体的股骨部件包括适于被容纳在股骨的转子间区域中的近端部分，颈部部分，其从近端部分向内倾斜向内和向上倾斜并且适于连接到股骨头元件，以及 茎部与近侧部分平滑地并入并向下延伸。 近端部分具有向前和向下收敛的前部和前部方面，并且在前部和内侧倾斜地相对于茎部分定向的圆形内侧面相交，所述方面限定了适于接合股骨内壁表面的大致楔形体 转子间区域，使得基本上所有的负载从组件传递到转子间区域中的骨骼，并且通过其他表面的负载传递最小化。

    KNEE JOINT PROSTHESIS
    8.
    发明申请
    KNEE JOINT PROSTHESIS 审中-公开

    公开(公告)号：US20130310944A1

    公开(公告)日：2013-11-21

    申请号：US13945986

    申请日：2013-07-19

    Applicant: Chitranjan S. Ranawat ,  DePuy International, Ltd.

    Inventor： Richard Farrar ,  Liam Rowley ,  Andrew Cohen ,  James Brooks ,  Chitranjan S. Ranawat

    IPC: A61F2/38

    CPC classification number: A61F2/3886 ,  A61F2/3859 ,  A61F2/389 ,  A61F2002/30133 ,  A61F2002/30332 ,  A61F2002/30518 ,  A61F2002/30688 ,  A61F2002/3082 ,  A61F2002/30878 ,  A61F2220/0025 ,  A61F2220/0033 ,  A61F2230/0015 ,  A61F2310/00029

    Abstract: A knee joint prosthesis which comprises a tibial component (4, 6) and a femoral component (2). The femoral component has condyles (14, 16) which act against the tibial component, directly or indirectly, during flexing of the knee. A cam (20) on the femoral component acts against a post (26) on the tibial component at high flex angles. The surface of the post which is contacted by the cam at high flex angles is convex when the post viewed generally perpendicular to the tibial bone contact and bearing surfaces, and the femoral bearing surface which is provided by the cam, where it contacts the convex surface of the post at high flex angles, is locally concave (32) when viewed along the surface of the post which contacts the cam so that the area of contact between the post and the cam is greater at high flex angles than at lower flex angles.

    Abstract translation: 膝关节假体，其包括胫骨部件（4,6）和股骨部件（2）。 股骨部件具有在膝盖弯曲期间直接或间接作用于胫骨部件的髁（14,16）。 股骨组件上的凸轮（20）以高弯曲角度作用在胫骨部件上的柱（26）上。 当大体上垂直于胫骨接触和支承表面观察的柱以及由凸轮提供的股骨承载表面接触凸起表面时，凸起以高挠曲角接触的柱的表面是凸的， 当沿着与凸轮接触的柱的表面观察时，在高弯曲角度处的柱是局部凹的（32），使得柱和凸轮之间的接触面积比在较低弯曲角度处的高弯曲角更大。

    FEMORAL COMPONENT FOR A HIP PROSTHESIS
    9.
    发明申请
    FEMORAL COMPONENT FOR A HIP PROSTHESIS 审中-公开
    髋关节假体的组成部分

    公开(公告)号：US20140343685A1

    公开(公告)日：2014-11-20

    申请号：US14282402

    申请日：2014-05-20

    Applicant: Chitranjan S. Ranawat ,  Amar S. Ranawat ,  Leslie L. Jacobs ,  Morteza Meftah

    Inventor： Chitranjan S. Ranawat ,  Amar S. Ranawat ,  Leslie L. Jacobs ,  Morteza Meftah

    IPC: A61F2/36

    CPC classification number: A61F2/3662 ,  A61F2002/30029 ,  A61F2002/30158 ,  A61F2002/3678

    Abstract: A femoral component for a hip prosthesis has a proximal end for disposition at a superior position in a femur and a distal end opposite the proximal end. The femoral component has opposite medial and lateral sides and opposite anterior and posterior faces extending between the medial and lateral sides. At least a proximal part of the femoral component has a first superior-to-inferior taper so that a medial to lateral dimension decreases gradually from the proximal end toward the distal end, a second superior-to-inferior taper so that an anterior to posterior dimension of the femoral component decreases gradually from the proximal end toward the distal end and a lateral-to-medial taper so that an anterior to posterior dimension of the femoral component decreases gradually from the lateral side toward the medial side.

    Abstract translation: 用于髋关节假体的股骨部件具有用于在股骨的上部位置配置的近端和与近端相对的远端。 股骨部件具有相对的内侧和侧面以及在内侧和外侧之间延伸的相对的前后表面。 至少股骨部件的近端部分具有第一上至下锥形，使得内侧至侧向尺寸从近端朝向远端逐渐减小，第二上至下锥度使得前后向后 股骨部件的尺寸从近端朝向远端逐渐减小，并且横向到内侧的锥度使得股骨部件的前后尺寸从侧面向内侧逐渐减小。

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