Patents by Inventor Christopher Dreyer

Christopher Dreyer 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).

  • SIZE-SEPARATION OF DRY GRANULAR MATERIALS
    Publication number: 20160082478
    Abstract: A dry granular material sieve operates well in microgravity because it comprises a rotatable cylindrical or conical screen to generate centrifugal forces sufficient to sift finer particles inside through to the outside, and auger screw conveyors to move the fines, coarse, and remainder materials without the aid of normal gravity.
    Type: Application
    Filed: June 30, 2015
    Publication date: March 24, 2016
    Inventors: Otis Walton, Christopher Dreyer, Edward Riedel
  • Centrifugal size-separation sieve for granular materials
    Patent number: 9073088
    Abstract: A centrifugal sieve and method utilizes centrifugal force in rapidly-rotated cylindrical or conical screens as the primary body force contributing to size segregation. Within the centrifugal acceleration field, vibration and/or shearing flows are induced to facilitate size segregation and eventual separation of the fines from the coarse material. Inside a rotating cylindrical or conical screen, a separately-rotated screw auger blade can be used to transport material along the rotating cylinder or conical wall and to induce shearing in the material.
    Type: Grant
    Filed: April 17, 2012
    Date of Patent: July 7, 2015
    Inventors: Otis Walton, Christopher Dreyer, Edward Riedel
  • Centrifugal Size-Separation Sieve for Granular Materials
    Publication number: 20130270158
    Abstract: A centrifugal sieve and method utilizes centrifugal force in rapidly-rotated cylindrical or conical screens as the primary body force contributing to size segregation. Within the centrifugal acceleration field, vibration and/or shearing flows are induced to facilitate size segregation and eventual separation of the fines from the coarse material. Inside a rotating cylindrical or conical screen, a separately-rotated screw auger blade can be used to transport material along the rotating cylinder or conical wall and to induce shearing in the material.
    Type: Application
    Filed: April 17, 2012
    Publication date: October 17, 2013
    Inventors: Otis Walton, Christopher Dreyer, Edward Riedel