Patents by Inventor Thomas F. Bartman

Thomas F. Bartman 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: 5037402
    Abstract: A hypodermic syringe incorporating a post-injection safety sheath for enclosing the sharpened needle tip. The hypodermic syringe incorporates parallel main and sheath chambers, the main chamber being to store fluid being injected or withdrawn, the parallel sheath chamber positioning the protective sheath. An axially aligned slot is disposed in the wall of the protective needle sheath and is aligned in communication with the ingress of the arcuate needle. A helical compression spring is coaxially aligned within the sheath chamber against the needle sheath biasing the sheath to enclosure the needle tip. When compressed, the needle sheath is withdrawn from the needle tip held in place through a detachable tab extending through the chamber wall.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: August 6, 1991
    Inventor: Thomas F. Bartman
  • Patent number: 5026353
    Abstract: A hypodermic syringe incorporating a post-injection safety sheath for enclosing the needle tip. The hypodermic syringe incorporates a central chamber and two slide chambers disposed on opposite sides of, and in parallel spaced relation to the central chamber. The central chamber is used to store fluid being injected into or withdrawn from the patient. The slide chambers enclose compressive apparatus for positioning the protective sheath. A helical compression spring is coaxially aligned within each of the slide chambers, each being coupled to the protective sheath. When the helical springs are positioned in the compressed state, the protective sheath is urged away from the distal end of the needle and maintained in position through a pair of release tabs extending through the walls of the slide chambers. When extended, the needle tip is closed within the protective sheath.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: June 25, 1991
    Inventor: Thomas F. Bartman