Patents by Inventor Andrew Hruska

Andrew Hruska 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).

  • Modular tankless electronic water heater
    Patent number: 6389226
    Abstract: A compact tankless water heater of modular configuration to accommodate a range of potential demands is disclosed. A heat transfer chamber is divided into subchambers, each of which may may mount more than one heating element. Notched passageways at the top of each dividing wall allow water passage between chambers, and a plurality of temperature sensors act in concert with a flow sensor and microprocessor control of the heating elements to maintain a constant set point output water temperature.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: May 14, 2002
    Assignee: Envirotech Systems Worldwide, Inc.
    Inventors: Stephen D. Neale, Randall W. Stultz, Andrew Hruska, Gary Gordon, Steven J. Onder