Patents by Inventor George F. Crabtree

George F. Crabtree 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: 5123803
    Abstract: A stern drive handling device includes a wheeled lower support frame and an extensible upper support frame telescopically mounted on the lower support frame. A horizontally disposed hollow sleeve is secured to the upper end of the upper support frame and a screw jack is provided for adjusting the height of the sleeve relative to the lower support frame. A support bracket assembly is pivotally mounted in the sleeve for swinging movement about a horizontal axis and a pair of pivoted clamps adapted to engage the cavitation plates on the housing of a stern drive unit are pivotally mounted on the support bracket assembly for pivotal adjusting movement about a second horizontal axis orthogonal to the first horizontal axis. The clamps may be secured in any desired pivoted position and limit stops are provided to limit the pivoting movement of the clamps.
    Type: Grant
    Filed: September 11, 1990
    Date of Patent: June 23, 1992
    Inventor: George F. Crabtree
  • Patent number: 4254946
    Abstract: A repair fixture for the lower unit of an outboard motor or outdrive which has a U-form body with a bight portion and side arms. One of the arms carries a tubular supporting projection which is telescopically mounted in a fixed sleeve on a work surface. The bight portion is notched centrally to engage the leading edge of a lower unit housing, and the side arms have clamps to releasably engage one of the horizontal cavitation fins of said unit.
    Type: Grant
    Filed: June 29, 1979
    Date of Patent: March 10, 1981
    Inventors: Robert M. Kerr, George F. Crabtree