Patents by Inventor Peter G. Niederer

Peter G. Niederer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4666449
    Abstract: The hip joint socket is formed of a socket body of relatively elastic material, for example of plastic, and one or more reinforcement rings which are shrunk fit on the socket body under a prestress. The rings impart rigidity to the hip joint socket. The rings may protrude from the contour of the socket body or may have projections which protrude from the contour of the socket body in order to improve fixation in a cement bed or pelvic cavity.
    Type: Grant
    Filed: February 29, 1984
    Date of Patent: May 19, 1987
    Assignees: Sulzer Brothers Ltd., Protek AG
    Inventors: Otto Frey, Peter G. Niederer
  • Patent number: 4530115
    Abstract: The prosthesis shank is composed of a blade which carries a joint head and a wedge-shaped end piece. The end piece is driven in along a guide in the lateral narrow side of the blade while the blade remains in a fixed position. The wedge-shaped form of the end piece permits fixation of the blade at a predetermined height such that the joint head can be at the level of the trochanter tip.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: July 23, 1985
    Assignees: Gebruder Selzer AG, Protek AG
    Inventors: Maurice E. Muller, Peter G. Niederer, Otto Frey
  • Patent number: 4450592
    Abstract: The socket body has an exterior surface which tapers in one direction while anchoring beads on the exterior surface taper in an opposite outward direction. The beads serve to anchor the body within a pelvis. In addition, cross ribs are formed on the anchoring beads with at least some of the ribs being elastic. Upon insertion of the socket, the ribs bend in a direction opposite to the direction of insertion. The two oppositely directed anchoring tapers of the socket body and the beads provide a firm fit of the socket body in a pelvis with a cement-free anchoring. Also, the bent ribs tend to resist withdrawal of the socket from the pelvis.
    Type: Grant
    Filed: January 8, 1982
    Date of Patent: May 29, 1984
    Assignee: Sulzer Brothers Limited
    Inventors: Peter G. Niederer, Otto Frey
  • Patent number: 4430761
    Abstract: The shank of the prosthesis is provided with a plurality of parallel grooves in order to improve adhesion of the shank in a prepred bone cavity. The grooves are used to improve adhesion either directly to bone tissue or to a cement bed within a bone cavity. The grooves are spaced apart on a center-line to center-line distance of a few millimeters and each has a depth of several tenths of a millimeter.
    Type: Grant
    Filed: November 3, 1981
    Date of Patent: February 14, 1984
    Assignee: Sulzer Brothers Limited
    Inventors: Peter G. Niederer, Otto Frey
  • Patent number: 4359785
    Abstract: In patients with hypoplastic hip joints, hip joint prostheses with relatively thin and narrow shank blades must be used. For this reason, due to the torque effect of the force acting on the joint head, the danger exists that deformations of the shank blades may occur. This danger is counteracted in that the collar type projection forming the transition between the shank and the prosthesis neck extends in a direction parallel to the prosthesis neck, preferably in a prolongation of the lower edge of the prosthesis neck.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: November 23, 1982
    Assignee: Gebruder Sulzer, Aktiengesellschaft Protek A.G.
    Inventor: Peter G. Niederer
  • Patent number: 4199824
    Abstract: The intramedullary stem is provided with a plurality of recesses in the wide sides which are disposed in herring bone fashion. These recesses communicate with a longitudinal groove so that bone tissue material may move into the recesses and grooves during implantation. Apertures may also be provided through the stem so as to provide spaces for the tissue material to collect in a packed manner. Each recess also has a domed shaped pocket on the upper side to receive the material during implantation.
    Type: Grant
    Filed: September 13, 1978
    Date of Patent: April 29, 1980
    Assignee: Sulzer Brothers Limited
    Inventor: Peter G. Niederer