Patents by Inventor Robert W. Jenson

Robert W. Jenson 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).

  • Disposable hypodermic syringe with needle safe feature
    Patent number: 5540660
    Abstract: In a syringe with a hollow cylindrical barrel with one closed end, a plunger having a length longer than the barrel mounted in the barrel for reciprocation, a handle on the distal end of the plunger extending from the barrel and a piston mounted on the opposite end of the plunger in the barrel and a hypodermic needle mounted in the closed end of the barrel being in communication with the interior of the barrel, the improvement of including a hollow tapered section in the barrel adjacent to its closed end, which tapered section in cooperation with the piston end of the plunger is operable to disable the syringe as the piston commences traversing this tapered portion of the barrel.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: July 30, 1996
    Inventor: Robert W. Jenson
  • One-shot syringe
    Patent number: 5380285
    Abstract: In a syringe with a hollow cylindrical barrel with one closed end, a plunger having a length longer than the barrel mounted in the barrel for reciprocation, a handle on the distal end of the plunger extending from the barrel and a piston mounted on the opposite end of the plunger in the barrel and a hypodermic needle mounted in the closed end of the barrel being in communication with the interior of the barrel, the improvement of including a hollow tapered section in the barrel adjacent to its closed end, which tapered section in cooperation with the piston end of the plunger is operable to disable the syringe as the piston commences traversing this tapered portion of the barrel.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: January 10, 1995
    Inventor: Robert W. Jenson
  • Disposable hypodermic syringe with needle safe feature
    Patent number: 5267962
    Abstract: In a syringe with a hollow cylindrical barrel with one closed end, a plunger having a length longer than the barrel mounted in the barrel for reciprocation, a handle on the distal end of the plunger extending from the barrel and a piston mounted on the opposite end of the plunger in the barrel and a hypodermic needle mounted in the closed end of the barrel being in communication with the interior of the barrel, the improvement of including a hollow tapered section in the barrel adjacent to its closed end, which tapered section in cooperation with the piston end of the plunger is operable to disable the syringe as the piston commences traversing this tapered portion of the barrel.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: December 7, 1993
    Inventor: Robert W. Jenson