Patents by Inventor David B. McCallum

David B. McCallum 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: 5827314
    Abstract: A lifting apparatus for deployment through a laparoscopic incision in a body wall to apply an external lifting force over a large area of the body wall. The apparatus provides a broad lifting surface that is capable of applying a lifting force of at least 40 pounds (180 Newtons) to an area of a body wall sufficiently extensive to reduce the lifting pressure exerted on the body wall to well below that which could cause pressure trauma to the body wall, yet delivers this broad lifting surface through the body wall via an incision about 14 mm long. The apparatus comprises a body wall engaging element capable of passing in a packaged state through the laparoscopic incision, and being inflatable to an inflated state. In the inflated state, the body wall engaging element is substantially toroidal, provides a broad lifting face, and bounds a central hole. The body wall engaging element includes an equatorial portion facing into the central hole.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: October 27, 1998
    Assignee: Origin Medsystems, Inc.
    Inventors: John P. Lunsford, Edwin J. Hlavka, Edmund J. Roschak, Daniel T. Wallace, Charles Gresl, Jr., David B. McCallum, Dana G. Mead
  • Patent number: 5681341
    Abstract: A lifting apparatus for deployment through a laparoscopic incision in a body wall to apply an external lifting force over a large area of the body wall. The apparatus provides a broad lifting surface that is capable of applying a lifting force of at least 40 pounds (180 Newtons) to an area of a body wall sufficiently extensive to reduce the lifting pressure exerted on the body wall to well below that which could cause pressure trauma to the body wall, yet delivers this broad lifting surface through the body wall via an incision about 14 mm long. The apparatus comprises a body wall engaging element capable of passing in a packaged state through the laparoscopic incision, and being inflatable to an inflated state. In the inflated state, the body wall engaging element is substantially toroidal, provides a broad lifting face, and bounds a central hole. The body wall engaging element includes an equatorial portion facing into the central hole.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: October 28, 1997
    Assignee: Origin Medsystems, Inc.
    Inventors: John P. Lunsford, Edwin J. Hlavka, Edmund J. Roschak, Daniel T. Wallace, Charles Gresl, Jr., David B. McCallum, Dana G. Mead