Patents by Inventor Lars T. Marmsater

Lars T. Marmsater 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).

  • System for precisely controlling discharge rates for loss-in-weight feeder systems
    Patent number: 6168305
    Abstract: System for controlling the discharge rate of a material feeder. A weight scale connected to the material is sampled and the samples input to a digital processor. The digital processor determines for consecutive time intervals during discharge of said material, a weight loss over the time interval. The weight loss for the interval is compared with a desired weight loss which is calculated from a desired setpoint material discharge rate obtained only when the weight loss is constant and stable. The resulting error is averaged with subsequent errors to form a control signal for the material feeder. The calculation of errors over each subsequent interval increases the resolution of the control signal, increasing the ability to control discharge rates to compensate for changes in material density which otherwise affect discharge rates.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: January 2, 2001
    Assignee: Merrick Industries, Inc.
    Inventor: Lars T. Marmsater