Patents by Inventor Joshua T. Perko

Joshua T. Perko 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).

  • System and method for lubricating a cryogenic pump
    Patent number: 10190556
    Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.
    Type: Grant
    Filed: January 9, 2017
    Date of Patent: January 29, 2019
    Assignee: Caterpillar Inc.
    Inventors: Joshua T. Perko, Dana R. Coldren, Glenn B. Cox
  • System and Method for Lubricating a Cryogenic Pump
    Publication number: 20180195479
    Abstract: A cryogenic LNG fuel system is provided that includes a tank for storing LNG and a LNG fill system including a LNG inlet passage for directing a flow of LNG into the tank. A cryogenic pump is in fluid communication with the tank and includes a pumping element at least partially immersed in the LNG for directing the LNG out of the tank and a seal. A lubricant system is provided that includes a lubricant reservoir and a lubricant inlet passage in communication with the lubricant reservoir and the LNG inlet passage. The lubricant system is adapted to introduce the lubricant into the flow of LNG in the LNG inlet passage such that at least a portion of the lubricant is entrained in the LNG in the LNG inlet passage and carried into the tank.
    Type: Application
    Filed: January 9, 2017
    Publication date: July 12, 2018
    Applicant: Caterpillar Inc.
    Inventors: Joshua T. Perko, Dana R. Coldren, Glenn B. Cox