Patents by Inventor Dean D. Messinger

Dean D. Messinger 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).

  • Engine having a high pressure hydraulic system and low pressure lubricating system
    Patent number: 5894830
    Abstract: An engine includes an engine housing having an oil pan with an amount of oil therein. An oil lubricating system for the engine has a low pressure pump attached to the engine housing. A hydraulic system, which uses the same oil as the lubricating system, has a high pressure pump positioned in the oil pan, attached to the engine housing, and at least partially submerged in the oil.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: April 20, 1999
    Assignee: Caterpillar Inc.
    Inventors: James R. Blass, Dennis H. Gibson, Dean D. Messinger, Alan R. Stockner