Patents by Inventor Bruce M. Roxburgh

Bruce M. Roxburgh 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).

  • Liquid filter with bypass passage
    Patent number: 5037539
    Abstract: A liquid filter for filtering the lubricating oil of an internal combustion engine includes a bypass passage permitting liquid to flow from the outlet to the inlet in a direction opposite to normal flow through the filter when the engine is initially filled with oil by a pressure lubrication fill process. When the engine is first started, a valve responds to normal engine oil pressure to close the bypass passage.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: August 6, 1991
    Assignee: Allied-Signal Inc.
    Inventors: Charles K. Hutchins, Glenn C. Anderly, Bruce M. Roxburgh, Richard L. McNeil, James A. Gasparri