Patents by Inventor Lorn Macdonald

Lorn Macdonald 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: 20130192218
    Abstract: An energy conversion device, a removable assembly for use with the energy conversion device and an associated methods. The energy conversion device comprises a flexible diaphragm configured to be located between a first fluid and a second fluid and being moveable in response to variations in at least one of the first and second fluids to permit energy transfer between said fluids; and a limit apparatus configured to limit movement of the diaphragm at a limit position, wherein the limit apparatus defines a contoured contact surface configured to be engaged by the diaphragm when in its limit position.
    Type: Application
    Filed: March 11, 2011
    Publication date: August 1, 2013
    Applicant: AWS OCEAN ENERGY LIMITED
    Inventors: Anne Briffett, Lorn Macdonald
  • Patent number: 6014880
    Abstract: The invention provides a siding machine for making metal siding having a formed top edge, a formed bottom edge, and a formed middle portion, from a coil of sheet metal which feeds between upper and lower rolls. The machine comprises a flat board former section having a fixed position bottom edge former, a plurality of fixed position driven upper and lower drive roll sets for feeding the sheet metal through the machine and an adjustable top edge former. The top edge former is adjustable from a minimum width closest to the bottom edge former to a maximum width. A transformer section receives a flat formed board from the flat board former section for forming a decorative profile in the middle portion of the board. Transformer rolls are mounted on an adjustable frame adjustable, within pre-set limits, perpendicular to the direction of travel of the board such that the transformer rolls may contact and form the board at a chosen location on its face.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: January 18, 2000
    Assignee: North American Machine Manufacturing Ltd.
    Inventors: Lorne MacDonald, Don Pockrandt