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:
Sep. 24, 2002
Filed:
Apr. 12, 1996
Roland Boström, Enköping, SE;
Ragnvald Olingsberg, Järfälla, SE;
Bezan Nachebia, St. Petersburg, RU;
Dimitri Taits, St. Petersburg, RU;
Forskarpatent i Uppsala AB, Uppsala, SE;
Abstract
A device for indicating ice formation (and/or already existing ice) on a surface ( ) of an object using a sensor ( ) comprising a temperature difference measuring device, preferably a Peltier element ( ), that has one of its contact surfaces ( ) in thermal contact with the surface ( ) which is exposed to ice formation. Ice formation is detected through measurement of the change in heat flow which occurs at the contact surface ( ) due to the heat released in connection with ice formation, which measurement is carried out by connecting a voltage indicator to the connecting lines ( ) of the Peltier element. After having established that ice has formed, these wires can, if the sensor ( ) is a Peltier element ( ), be connected to a current source ( ) for alternate heating and temperature sensoring of said contact surface ( ), whereby the surface temperature will remain 0° C. as long as there is ice and considerably higher if there is no ice, which in turn is indicated by an indicator ( ) that is connected to the voltage indicator.