Patents Assigned to Greystone, Inc.
  • Sand dewatering device and method
    Patent number: 8695804
    Abstract: A dewatering device for aggregate products such as sand and gravel to allow dewatering to a moisture within the range of 8% by weight. This energy efficient dewatering system uses an inclined rotatably mounted dewatering screw to initially dewater, followed by an associated vibratory dewatering screen to achieve combined results that neither an inclined dewatering screw or a vibratory screen can achieve separately.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: April 15, 2014
    Assignee: Greystone, Inc.
    Inventors: William John Bennington, II, Brian Robert Beck
  • Method and means for sand reblending
    Patent number: 6871757
    Abstract: A method and apparatus for reblending sand whereby multiple reblending tanks with a plurality of reblending stations have thin respective outputs joined through a single control system.
    Type: Grant
    Filed: January 3, 2003
    Date of Patent: March 29, 2005
    Assignee: Greystone, Inc.
    Inventors: William J. Bennington, II, Franklin E Squires