Patents by Inventor John H. Barclay

John H. Barclay 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: 4274542
    Abstract: A method of transferring a crane from a tower to an adjacent elevated site, such as a building under construction. The crane is raised from the tower by an elevating frame secured at one end to the tower. A transition section is inserted between the crane and the top of the tower. A bogie with an open end on the site straddles the elevating frame and receives cross beams on each end. The crane and transition section are raised, and the bogie is centered with respect to the tower. The cross beams are positioned under the ends of the transition section to which they are then bolted. The elevating frame is lowered to transfer the full weight of the crane to the transition section, and to the bogie, which can then be moved horizontally on the site away from the tower.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: June 23, 1981
    Assignee: FMC Corporation
    Inventor: John H. Barclay