Patents Assigned to Melvin L. Black, Inc.
  • Efficient concrete recycling
    Patent number: 6758590
    Abstract: A concrete plant with robust recycling capabilities and high energy efficiency is disclosed. In one aspect, a concrete recycling machine used at the concrete plant includes at least a slurry vessel that receives slurry provided from concrete being returned, a motor that drives an agitation device that agitates the slurry in the slurry vessel, and a control system that controls at least one of duration and frequency with which the motor drives the agitation device.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: July 6, 2004
    Assignee: Melvin L. Black, Inc.
    Inventor: Melvin L. Black