Patents by Inventor Randy L. Marquis

Randy L. Marquis 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).

  • Publication number: 20130074936
    Abstract: A reductant delivery and supply system including a storage tank, a pump, a dosing module, and a mis-fill prevention system. The storage tank stores a fluid. The pump is coupled to the storage tank by a delivery line. The dosing module is coupled to the pump by a supply line. The mis-fill prevention system includes an expandable plug. The expandable plug is configured in contact with the fluid. Moreover, the expandable plug is configured to expand on contact with a hydrocarbon.
    Type: Application
    Filed: September 27, 2011
    Publication date: March 28, 2013
    Applicant: Caterpillar Inc.
    Inventors: Jack A. Merchant, Randy L. Marquis
  • Patent number: 6367848
    Abstract: Past applications have found that a joint becomes damaged due to the high loading and vibration loads in which it encounters during operation. The counterbored joint utilizes the flexible shim that is larger than the body receiving bore. A undercut is machined into the body receiving bore which allows for the flexible shim to be placed within the body receiving bore between the first and second step surfaces. The first step surface is parallel to the second step surface which distributes stresses uniformly and helps in sealing. The principal use is for a cylinder liner joint, however any joint that is highly loaded or encounters vibrational loads will benefit from this invention. For example, a hydraulic joint that utilizes a piston in operation may be remanufactured with this invention.
    Type: Grant
    Filed: April 27, 1999
    Date of Patent: April 9, 2002
    Assignee: Caterpillar Inc.
    Inventors: Judson R. Bruce, Randy L. Marquis
  • Patent number: 5967109
    Abstract: Past applications have found that a joint becomes damaged due to the high loading and vibration loads in which it encounters during operation. The counterbored joint utilizes the flexible shim that is larger than the body receiving bore. A undercut is machined into the body receiving bore which allows for the flexible shim to be placed within the body receiving bore between the first and second step surfaces. The first step surface is parallel to the second step surface which distributes stresses uniformly and helps in sealing. The principal use is for a cylinder liner joint, however any joint that is highly loaded or encounters vibrational loads will benefit from this invention. For example, a hydraulic joint that utilizes a piston in operation may be remanufactured with this invention.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: October 19, 1999
    Assignee: Caterpillar Inc.
    Inventors: Judson R. Bruce, Randy L. Marquis