Patents by Inventor Michael P. Macdonald

Michael P. 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).

  • Surface compactor and method of operation
    Patent number: 9926675
    Abstract: The present invention relates to a surface compactor and a method of operating a surface compactor. The surface compactor is provided with at least one compacting surface for compacting a substrate an excitation system that generates a substantially square wave vibrational displacement or force that vibrates the least one compacting surface during compaction to increase the compaction rate of the substrate.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: March 27, 2018
    Assignee: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Michael P. MacDonald, Dale W. Starry, Jr.
  • ASPHALT PAVEMENT CONSTRUCTING MACHINE AND METHOD OF OPERATION
    Publication number: 20140119827
    Abstract: The present invention relates to an asphalt pavement constructing machine and a method for operating an asphalt pavement constructing machine provided with an asphalt compacting surface for compacting asphalt mix on a paving surface during an asphalt pavement formation operation. At least one exciter is provided that vibrates the compacting surface at one or more frequencies selected to prevent the asphalt mix from adhering to the compacting surface.
    Type: Application
    Filed: October 26, 2012
    Publication date: May 1, 2014
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: John R. Haupt, Michael P. MacDonald
  • SURFACE COMPACTOR AND METHOD OF OPERATION
    Publication number: 20140064850
    Abstract: The present invention relates to a surface compactor and a method of operating a surface compactor. The surface compactor is provided with at least one compacting surface for compacting a substrate an excitation system that generates a substantially square wave vibrational displacement or force that vibrates the least one compacting surface during compaction to increase the compaction rate of the substrate.
    Type: Application
    Filed: May 20, 2011
    Publication date: March 6, 2014
    Applicant: VOLVO CONSTRUCTION EQUIPMENT AB
    Inventors: Michael P. MacDonald, Dale W. Starry, JR.
  • Material handler with electronic load chart
    Patent number: 6779961
    Abstract: The present invention is directed to a material handler that includes a frame, a telescoping boom, a boom extension sensor, a boom angle sensor, and a control system. The telescoping boom is coupled to the frame, pivotable between a lowered and a raised position, and movable between a retracted and an extended position. The boom extension sensor generates a first signal that corresponds to the distance which the boom is extended. The boom angle sensor generates a second signal that corresponds to the angle which the boom is pivoted. The control system receives the signals and displays a cursor located at a position that is based on the first signal and the second signal.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: August 24, 2004
    Assignee: Ingersoll-Rand Company
    Inventors: Joseph S. Barney, G. Louis Troppman, III, Michael P. Macdonald
  • Material handler with electronic load chart
    Publication number: 20030082041
    Abstract: The present invention is directed to a material handler that includes a frame, a telescoping boom, a boom extension sensor, a boom angle sensor, and a control system. The telescoping boom is coupled to the frame, pivotable between a lowered and a raised position, and movable between a retracted and an extended position. The boom extension sensor generates a first signal that corresponds to the distance which the boom is extended. The boom angle sensor generates a second signal that corresponds to the angle which the boom is pivoted. The control system receives the signals and displays a cursor located at a position that is based on the first signal and the second signal.
    Type: Application
    Filed: October 29, 2001
    Publication date: May 1, 2003
    Applicant: Ingersoll-Rand Company
    Inventors: Joseph S. Barney, G. Louis Troppman, Michael P. Macdonald