Patents by Inventor Frederick A. Monahan

Frederick A. Monahan 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).

  • Pipe spinning tool
    Patent number: 4446761
    Abstract: A well pipe spinner having two body parts carrying rollers adpated to engage a pipe at different locations about its periphery and grip and spin the pipe by rotation of one or more of the rollers, with the two body parts being mounted by pivotal connections for swinging movement about two spaced axes respectively to grip and release the pipe, and with an adjustable connection attaching the two pivotal connections together for relative lateral adjusting movement to shift their pivotal axes toward and away from one another for gripping different sizes of pipe.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: May 8, 1984
    Assignee: Varco International, Inc.
    Inventors: George I Boyadjieff, Frederick A. Monahan