The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2002
Filed:
Nov. 29, 2000
Jerry A. Stenzel, Mankato, MN (US);
Thomas K. Hiniker, Mankato, MN (US);
Michael W. Lundgreen, Fairmont, MN (US);
Mark H. Jaeger, Mapleton, MN (US);
Thomas C. Schlosser, North Mankato, MN (US);
Blue Earth Research, Mankato, MN (US);
Abstract
The present invention relates to a control system for establishing and maintaining a desired uniform temperature in a room heated by a heating device. The control system includes a valve assembly for controlling the pressure of the fluid supplied to the heating device, the valve assembly including a valve actuator, a pressure sensor sensing the pressure of the fluid supplied to the heater, and a temperature control device to sense the ambient temperature of the room. The control system also includes an electronic control unit connected to the aforementioned elements, the electronic control unit including an electronic circuit which samples “open” and “close” input signals from the temperature control device, determines the rate of change of the pressure of the fluid from a predetermined pressure set point, and varies the pressure set point (which thereby varies the heating device output), according to the “open” or “close” signals by providing a command signal to the valve actuator. This command signal is based upon a difference between the predetermined desired temperature and the actual temperature, and the rate of change of the pressure of the fluid.