Patents by Inventor Francis Bertram

Francis Bertram 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: 4846742
    Abstract: A stern drive for a marine vessel is provided with a series of internal passageways that route the hydraulic fluid to the trim cylinders so that external hydraulic hoses can be eliminated.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: July 11, 1989
    Assignee: Brunswick Corporation
    Inventors: Francis Bertram, Douglas A. Kiesling
  • Patent number: 4734071
    Abstract: A marine engine exhaust assembly (7) is provided with water flow path control devices which minimize back pressure. Lower intermediate elbow portions (8) and the respective bullhorn upper legs (12) are formed and joined in a manner to provide a continuous common gas-water passage which is axially linear in a fore-to-aft direction. The common gas-water passages are formed to provide a gradual reduction in cross-sectional area from top to bottom. The wall contours of the intermediate elbows gradually merge from circular at the upper end to generally elliptical at the lower end. In addition, the wall contours of the upper bullhorn legs are generally elliptical (FIG. 5) at their upper ends for communicating with the intermediate elbows, and gradually merge into a rectangular shape (FIG. 6) in the area of the bullhorn bends (13), which continues on to adjacent the bullhorn discharge portion.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: March 29, 1988
    Assignee: Brunswick Corporation
    Inventors: Alvin R. Zemlicka, Francis Bertram, Jay L. Menzel