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. 18, 1991
Filed:
Jan. 19, 1990
Frank Harrison, Kansas City, MO (US);
Other;
Abstract
A vehicle heating system (10) utilizes transmission fluid from the vehicle transmission (12) as a source for heat exchange in heater core (26). Fan (28) blows the heated air to heater vents in the normal fashion. When the interior of the vehicle reaches a threshold temperature, thermostat (50) detects the threshold temperature and actuates solenoid (46) which in turn actuates valve (44) so that transmission fluid is diverted from transmission output route (24) to input conduit (30) for heating circulation through heater core (26). The fluid is circulated through output conduit (32), check valve (42), portions of transmission output route (24), and finally radiator (20) where the transmission fluid is cooled for another cycle. The transmission fluid is then returned to transmission (12) via transmission input route (22). In preferred forms, the system (10) provides valve (38), tee connector (34) and caps (36,40). Valve (38) is shifted to a second mode so that pressure may be connected to output conduit (32) where cap (40) is removed, such that fluid may be circulated in a direction opposite to the normal heating mode and discharged via the outlet where cap (36) is removed. When optimum cleaning of heater core (26) has been accomplished, the pressure is disconnected, caps (36,40) are reconnected and valve (38) is returned to its normal heating mode.