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:
Oct. 15, 1991
Filed:
Oct. 24, 1989
Hirohisa Takada, Tokyo, JP;
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An anti-frost system for the windshield of a motor vehicle has a heating element incorporated in the windshield. The system has an atmospheric temperature sensor, a relative humidity sensor and a windshield temperature sensor. Signals from the atmospheric temperature sensor and the relative humidity sensor are inputted to a calculator circuit which calculates a saturated steam temperature from the input signals. The saturated steam temperature and the windshield temperature are delivered to an operation circuit, which determines that frosting on the windshield is expected under a combined condition to the windshield temperature and the saturated steam temperature and which turns a transistor on to close a switch to energize the heating element for preventing frosting in advance.