Patents by Inventor Pierre J. T. M. Jaspers

Pierre J. T. M. Jaspers 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).

  • Endo-prosthesis, a femoral head prosthesis and an acetabulum prosthesis
    Patent number: 5314494
    Abstract: A prosthesis for insertion into a long bone includes a stem which has been shaped so as to evenly distribute low stress to the bone. A synthetic resinous sheath surrounds the stem which effects a contact surface between the stem and the bone. The prosthesis includes an extension which extends outwardly of the bone and has a ball and socket thereon.
    Type: Grant
    Filed: March 31, 1993
    Date of Patent: May 24, 1994
    Assignee: Orthopaedic Technology B.V.
    Inventors: Hendrik W. J. Huiskes, Franciscus A. M. Ypma, Pierre J. T. M. Jaspers
  • Method of shaping an endo-prosthesis, a femoral head prosthesis, an acetabulum prosthesis and a method of fixing a femoral head prosthesis in a bone
    Patent number: 5041141
    Abstract: According to the present invention, the stress patterns at the interface between bone and cement of an existing prosthesis are calculated by a finite element model. For this model the external load, material properties and boundary conditions are provided. By means of advanced digital computers, stresses and strains in the model are calculated. Desired stress patterns are achieved through an optimization procedure to determine that geometry which generates those stress patterns which approximate the desired ones best.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: August 20, 1991
    Assignee: Orthopaedic Technology B.V.
    Inventors: Johannes F. A. M. Ypma, Hendrik W. J. Huiskes, Pierre J. T. M. Jaspers