Vehicle window heating apparatus

Boots – shoes – and leggings


Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0


219203, 307 101, B60L 102




A window heating apparatus for use with an automotive vheicle including a vehicle battery, an internal combustion engine, a transmission, and a generator for generating an output voltage corresponding to engine speed. A voltage regulator is switchably connected to the vehicle battery and, when connected, controls current to the field winding to maintain a constant generator output voltage. A heating element is provided for heating a vehicle window when connected to the generator output terminals. A signal indicative of a demand for heating the vehicle window and a signal indicating when the transmission is in neutral or park are provided. A circuit normally connects the generator output terminal to the vehicle battery and the voltage generator. The circuit, in response to a command signal, connects the generator output terminal to the element while disconnecting the generator output terminal from the vehicle battery and the voltage regulator. The command signal, which is produced in response to the vehicle window heating demand signal, is interrupted except when the transmission is in neutral or park to avoid excessive voltage which might damage the heating element. While the command signal is present, engine idling speed is controlled to change the generator output voltage delivered to the heater element, dependent on vehicle-compartment temperature. Also while the command signal is present, current to the field winding is interrupted if the generator output voltage exceeds a predeterminedd value.

patent: 3571560 (1969-05-01), Nilssen
patent: 4084126 (1978-04-01), Clements
patent: 4267433 (1981-05-01), Sahm, III
patent: 4277672 (1981-07-01), Jones
patent: 4316251 (1982-02-01), Saito et al.
patent: 4491108 (1985-01-01), Hasegawa et al.
patent: 4553516 (1985-11-01), Hasegawa
patent: 4577603 (1986-03-01), Murakami et al.
patent: 4625281 (1986-11-01), Deutsch
patent: 4633093 (1986-12-01), Otobe et al.
patent: 4649878 (1987-03-01), Otobe et al.
patent: 4673797 (1987-06-01), Weirick
patent: 4700675 (1987-10-01), Otobe et al.
patent: 4721083 (1988-01-01), Hosaka
patent: 4730097 (1988-03-01), Campbell et al.
patent: 4766862 (1988-08-01), Hibino et al.
patent: 4770543 (1988-09-01), Burghoff et al.
patent: 4884018 (1989-11-01), Mueret et al.
patent: 4967056 (1990-10-01), Iwasa
patent: 4985671 (1991-01-01), Sauer
patent: 5013994 (1991-05-01), Takatsuka
patent: 5025136 (1991-06-01), Doege et al.


Say what you really think

Search for the USA inventors and patents. Rate them and share your experience with other people.


Vehicle window heating apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Vehicle window heating apparatus, we encourage you to share that experience with our community. Your opinion is very important and Vehicle window heating apparatus will most certainly appreciate the feedback.

Rate now


Profile ID: LFUS-PAI-O-1809926

All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.