Patents by Inventor Alan S. Ledger

Alan S. Ledger 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: 5762179
    Abstract: A chord member for facilitating the assembly and disassembly of a concrete conveyor system including a top flange defining a first plane, a pair of depending lips positioned at either end of the top flange, a bottom flange defining a second plane parallel to the first plane and a middle flange defining a third plane perpendicular to the first plane. A clevis is coupled to the top flange or the bottom flange so that a truss of the conveyor system can be attached to the clevis.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: June 9, 1998
    Assignee: Rotec Industries, Inc.
    Inventors: Robert F. Oury, Mark S. Dingeldein, Alan S. Ledger, James C. Graham
  • Patent number: 5699878
    Abstract: Apparatus for raising a conveyor above the surface of a poured concrete structure as the structure is formed includes a post moveable in a vertical direction that supports a conveyor on top of the post. A horizontal support tube is connected to the post, as well as a collar. A jack engages the support and raises the post and collar. A hydraulic means then places a base around the post below the collar so that when the jack is lowered, the conveyor, post and collar are supported by the newly placed base, thereby raising the conveyor relative to the surface of the structure.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: December 23, 1997
    Assignee: Rotec Industries
    Inventors: Robert F. Oury, Mark S. Dingeldein, Alan S. Ledger, Joseph P. Gallione