Patents by Inventor Jefferson L. Ray

Jefferson L. Ray 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).

  • Ratchet connector for hypodermic syringe pistons
    Patent number: 4931043
    Abstract: A connector for attachment of a plunger to a rubber piston in hypodermic syringe cartridge ampoules comprises a pin having a shank portion with a contiguous screw-threaded post portion and a ratchet head portion sized to rotatably fit within a cavity in said piston which thus prevents overtightening the plunger to the piston thereby obviating jamming of the piston in the bore of the cartridge.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: June 5, 1990
    Assignee: Sterling Drug Inc.
    Inventors: Jefferson L. Ray, Michael E. Cooper