Patents by Inventor Raymond J. Porter

Raymond J. Porter 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).

  • Self-tailing winch
    Patent number: 4230306
    Abstract: A self-tailing winch of the type having a stationary frame and a rotatable drum. The tail of the rope or sheet is held in a groove between a pair of toroidal shaped gripping diaphrams of elastomeric material. There is a free space between each diaphram and the surface behind it whereby initial feeding of the sheet deflects the diaphrams into the free spaces. As the sheet moves toward the root of the groove, the resultant filling of the groove distorts the diaphrams against a greater reactive force.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: October 28, 1980
    Assignee: Barlow Marine Limited
    Inventor: Raymond J. Porter