Patents by Inventor Robert Milwain

Robert Milwain 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).

  • Publication number: 20050000705
    Abstract: A sod pick-up mechanism for a sod harvester has in one embodiment a set of hooks mounted on rotatable shafts. The hooks can be rotated through a grid into sod rolls or sod slabs located below the grid, to penetrate the sod rolls or slabs and pin them to the underside of the grid, after which the set of rolls or slabs thus retained can be moved to an appropriate stacking location such as a pallet. In another embodiment arms press against the ends of the sod rolls exerting pressure on them to retain them for pick up. If desired, the sod rolls can be arranged e.g., in sets of three, end-to-end, in the form of an arch to prevent the middle roll from dropping out. Pins which penetrate the sod rolls can be used to help retain the sod rolls while they are being moved.
    Type: Application
    Filed: February 19, 2004
    Publication date: January 6, 2005
    Inventors: Gerardus Brouwer, Robert Milwain
  • Publication number: 20050000704
    Abstract: Method and apparatus for lifting sod, in which grass blades of the sod are inserted between one or more clamps. The clamps are closed to grip the grass blades and the clamps are then moved, with the sod suspended therefrom, to a desired location. The clamps can if desired also grip the thatch, and/or a portion of the soil, of the sod slab.
    Type: Application
    Filed: February 19, 2004
    Publication date: January 6, 2005
    Inventors: Gerardus Brouwer, Robert Milwain
  • Patent number: 6834729
    Abstract: A pre-starter for starting a turn in the end of a sod strip travelling up a conveyor in a sod harvester. The pre-starter includes a metal plate sloping downwardly and rearwardly with its end pressing against the sod strip to catch the blades of grass on the upper surface of the sod strip, thereby causing the end of the sod strip to curl upwardly. The curled end of the sod strip then moves into a conventional sod roll-up mechanism spaced immediately behind the pre-starter, to roll the sod strip. This forms accurate and consistent rolls suitable for automation.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: December 28, 2004
    Assignee: Ontario Limited
    Inventors: Gerardus J. Brouwer, Robert Milwain
  • Patent number: 6779610
    Abstract: A sod harvester having a conveyor assembly to receive sod from a cutting head, a roll-up mechanism to form rolls from the cut sod, and a storage conveyor to receive a set of formed sod rolls, with a clamp to clamp the set of sod rolls and transfer it to a pallet. A diverter between the conveyor assembly and the storage conveyor normally allows sod rolls to travel to the storage conveyor but can be moved to create a gap through which defective sod rolls fall and are thereby rejected. A deflector located below the gap deflects scrap sod and defective sod rolls onto the cut portion of the sod field, rater than onto the uncut portion, so that the scrap sod deflected onto the field will not interfere with the next pass of the cutting head.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: August 24, 2004
    Assignee: 1045929 Ontario Limited
    Inventors: Gerardus J. Brouwer, Robert Milwain
  • Publication number: 20040079537
    Abstract: A pre-starter for starting a turn in the end of a sod strip travelling up a conveyor in a sod harvester. The pre-starter includes a metal plate sloping downwardly and rearwardly with its end pressing against the sod strip to catch the blades of grass on the upper surface of the sod strip, thereby causing the end of the sod strip to curl upwardly. The curled end of the sod strip then moves into a conventional sod roll-up mechanism spaced immediately behind the pre-starter, to roll the sod strip. This forms accurate and consistent rolls suitable for automation.
    Type: Application
    Filed: September 3, 2003
    Publication date: April 29, 2004
    Inventors: Gerardus J. Brouwer, Robert Milwain
  • Publication number: 20040060713
    Abstract: A sod harvester having a conveyor assembly to receive sod from a cutting head, a roll-up mechanism to form rolls from the cut sod, and a storage conveyor to receive a set of formed sod rolls, with a clamp to clamp the set of sod rolls and transfer it to a pallet. A diverter between the conveyor assembly and the storage conveyor normally allows sod rolls to travel to the storage conveyor but can be moved to create a gap through which defective sod rolls fall and are thereby rejected. A deflector located below the gap deflects scrap sod and defective sod rolls onto the cut portion of the sod field, rather than onto the uncut portion, so that the scrap sod deflected onto the field will not interfere with the next pass of the cutting head.
    Type: Application
    Filed: September 3, 2003
    Publication date: April 1, 2004
    Inventors: Gerardus J. Brouwer, Robert Milwain