Patents by Inventor JAMES NELSON PRATT

JAMES NELSON PRATT 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: 8950349
    Abstract: A turret/vessel bearing arrangement and method for replacing bearings in situ without removing other bearings. The bearings are capable of being separated. A removable axial spacer secures the vessel and the turret into engagement with the upper and lower thrust bearings. Removal of the spacer allows increased separation between vessel and turret flanges that sandwich the thrust bearings. The mid radial bearing assembly includes one or more radially arranged bearing pads that allow for limited axial displacement of the turret with respect to the vessel during thrust bearing replacement while still bearing radial loads and allowing rotation. The addition of a temporary thrust bearing allows the vessel to weathervane about the turret while thrust bearing are replaced in situ.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: February 10, 2015
    Assignee: SOFEC, Inc.
    Inventors: Stephen P. Lindblade, William Louis Fontenot, James Nelson Pratt
  • Publication number: 20140050428
    Abstract: A turret/vessel bearing arrangement and method for replacing bearings in situ without removing other bearings. The bearings are capable of being separated. A removable axial spacer secures the vessel and the turret into engagement with the upper and lower thrust bearings. Removal of the spacer allows increased separation between vessel and turret flanges that sandwich the thrust bearings. The mid radial bearing assembly includes one or more radially arranged bearing pads that allow for limited axial displacement of the turret with respect to the vessel during thrust bearing replacement while still bearing radial loads and allowing rotation. The addition of a temporary thrust bearing allows the vessel to weathervane about the turret while thrust bearing are replaced in situ.
    Type: Application
    Filed: August 17, 2012
    Publication date: February 20, 2014
    Inventors: STEPHEN P. LINDBLADE, WILLIAM LOUIS FONTENOT, JAMES NELSON PRATT