Patents by Inventor Stephen M. Kujawa

Stephen M. Kujawa 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).

  • Infrared and gas fluid heater system
    Patent number: 6131536
    Abstract: An instantaneous fluid heating system includes a fluid source, a use point for intermittently demanding fluid from the fluid source, an instantaneous IR gas heater, and a temperature sensor positioned external to the heater. The instantaneous IR gas heater is interposed operatively between the fluid source and the use point. The temperature sensor controls the regulation of the heater in response to output fluid temperature.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: October 17, 2000
    Inventor: Stephen M. Kujawa
  • Compact high volume point of use instantaneous water heating system
    Patent number: 4638944
    Abstract: A point of use, instantaneous, high-volume water heating system includes a compact accumulator tank fed by one or more instantaneous gas-fired auxiliary water heaters operating asynchronously to provide a supply of hot water on demand heated to a predetermined temperature. The accumulator tank includes a baffle which separates water in the tank into two temperature zones. A thermostat within the accumulator controls a pump which feeds water from a conventional water heater to the auxiliary water heaters, or alternatively recycles tank water to the auxiliary heaters, when the temperature in the accumulator tank drops below a predetermined minimum.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: January 27, 1987
    Inventors: Stephen M. Kujawa, Melvin H. Simon