Patents by Inventor David M. Nunamaker

David M. Nunamaker 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: 5578041
    Abstract: The present invention provides an external skeletal fixator for treating an injured mammalian limb. The fixator has a plurality of transfixation pins which pass through the intact bone of the injured limb proximal to the injured bone. These pins extend beyond the outer edges of the intact bone. These pins are supported by support members which abut the intact bone, extending through the soft tissue. These support members are, in turn, supported by a superstructure capable of supporting the weight of the animal, which superstructure extends beyond the distal end of the injured limb. Thus in the case of a weight bearing limb, the weight of the animal is transferred from the intact bone to the pins, to the supporting members, to the superstructure, to the ground, thus bypassing the injured bone.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: November 26, 1996
    Assignee: Trustees of the University of Pennsylvania
    Inventors: Ronald A. Nash, David M. Nunamaker
  • Patent number: 4604996
    Abstract: An external skeletal fixator for treating an injured mammalian limb, such as a horse's foreleg, includes a plurality of transfixation pins which transfix the bone at separated sites along the limb proximal the injury and terminate beyond the limb; means, exemplified by an organic polymer, for rigidly connecting pin terminii to a weight bearing member carried beneath the foot of the limb; together with means, e.g., affixing said weight bearing member to the foot of the limb, for immobilizing the limb distal the injury, whereby the weight of the mammal is transferred from the limb proximal the injury to the weight bearing member, permitting the mammal to ambulate while the injury heals.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: August 12, 1986
    Inventors: David M. Nunamaker, Dean W. Richardson