Patents by Inventor Randall Clare Harkema

Randall Clare Harkema 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: 8756813
    Abstract: A method of remanufacturing an injector involves an original lead extending from an overmold block. A milling cutter is used to mill a cavity into the overmold block to provide access to the original lead. The milling cutter splits the original lead into a remainder portion and a discard portion. A replacement lead is inserted into the overmold block to overlap with the remainder portion, and the overlapping leads are soldered to each other. The exposed overlap area is encapsulated with filling material. The original lead is preferably cut such that a tip of the remainder portion is angled, pointed, or otherwise shaped to increase the surface area that is exposed at the tip. The increased exposed surface area increases the area over which the replacement lead and the remainder portion make contact with each other when overlapping. Greater contact between the soldered leads strengthens their connection.
    Type: Grant
    Filed: February 7, 2012
    Date of Patent: June 24, 2014
    Assignee: Diesel Forward, Inc.
    Inventors: William Joseph Rutecki, Randall Clare Harkema, Thomas Edwin Earhart, Todd Foote
  • Patent number: 5743238
    Abstract: A device is provided for pumping fuel through an internal combustion engine, comprising a pump cylinder and a piston reciprocable within the pump cylinder to define a pump chamber open at one end in which fuel is pressurized during a pump stroke of the piston. A fuel supply means is provided for supplying fuel to the pump chamber. The fuel supply means includes an electromagnetically actuated fuel control valve having an armature secured thereto, with the armature residing in a fuel-filled armature cavity. The armature electromagnetically cycled between a first position closing the fuel control valve and thereby closing the flow of fuel to the pumping chamber and a second position opening the control valve thereby allowing fuel to flow to the pumping chamber.
    Type: Grant
    Filed: March 25, 1997
    Date of Patent: April 28, 1998
    Assignee: Diesel Technology Company
    Inventors: Stacy Jean Shorey, Randall Clare Harkema, Beckie J. DeYoung, Kenneth R. Potter, Robert Daniel Straub