Patents by Inventor Hartmut Schulte

Hartmut Schulte 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).

  • Electronic lime controller with controls responsive to flow rates and water hardness
    Patent number: 5171431
    Abstract: An electronic lime controller for controlling lime adjusts for water hardness and the water flow rate in a water system. The controller includes a control for adjusting the frequency of a controller output signal which creates a magnetic field via first and second coils wrapped around a pipe to adjust the controller for changing water flow rates. The controller also includes a control for adjusting the amplitude of the controller output signal based on water hardness rates which generates the magnetic field via the first and second coils.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: December 15, 1992
    Inventor: Hartmut Schulte