Patents by Inventor Elliot E. Herweyer

Elliot E. Herweyer 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).

  • Parallel piped fluid heaters with staged flow controlled by magnetic priority valves
    Patent number: 5368013
    Abstract: A system to stage the operation of a bank of parallel piped fluid heaters in order to avoid cycling at low demand and to spread the load evenly among two or more heaters during high demand. Each heater has a check valve at the inlet and a balancing valve at the outlet. The standard swing type check valve is modified by the use of an internal and external magnet to control the opening pressure. By adjusting the opening pressure of the check valves and balancing the system with the balancing valves, heater staged operation can be achieved.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: November 29, 1994
    Inventor: Elliot E. Herweyer