Patents by Inventor David Quatrochi

David Quatrochi 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: 5059179
    Abstract: A non-reusable syringe is made up of a hollow barrel with a hypodermic needle in communication with one end of the barrel, and a plunger assembly including a plunger movable in tight-fitting engagement through the interior of the barrel and a plunger shaft which extends axially away from the plunger and is releasably connected to one end of the plunger in such a way that relative rotation of the shaft with respect to the plunger in one direction will cause separation of the shaft from the plunger but reverse rotation will maintain the shaft and plunger in connected relation. A nut or keeper is positioned at the opposite end of the barrel to impart rotation to the shaft in response to axial movement of the shaft through the barrel.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: October 22, 1991
    Inventors: David Quatrochi, John K. Malone