Patents by Inventor John P. Michael

John P. Michael 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).

  • Frictional energy absorbing device and/or methods of absorbing energy
    Patent number: 4713917
    Abstract: A cyclic shear energy absorber is described for absorbing energy imposed onto the absorber. The absorber consists of a hollow core filled with densely packed granular material. The granular material is confined within the core so that cyclic shear energy imposed upon the absorber causes incipient dilation of the granular material. This incipient dilation is at least in part suppressed by the confining means. Inter-particle frictional forces within the granular material dissipate the imposed cyclic shear energy. The absorber may be confined between two end plates capable of being coupled to an associated structure such as a bridge support column and a base. The core may also be confined within a pile.
    Type: Grant
    Filed: April 20, 1987
    Date of Patent: December 22, 1987
    Assignee: DFC New Zealand Limited
    Inventors: Ian G. Buckle, John P. Michael
  • Portable enclosure for an electric scooter
    Patent number: D779680
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: February 21, 2017
    Inventor: John P. Michael