Patents by Inventor David R. Harker

David R. Harker 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).

  • Syringe injector
    Patent number: 4737151
    Abstract: A syringe injector to hold a syringe that comprises a barrel and a plunger. The plunger includes a piston received in the barrel. The injector comprises a support frame with a cradle to receive the syringe barrel at one end of the support frame. The plunger is held and there is a lever pivotally attached to the frame. A connecting rod extends from the lever to the holding means. In use, movement of the lever moves the plunger of the syringe and affords mechanical advantage to the user.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: April 12, 1988
    Inventors: John G. Clement, David R. Harker