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. 07, 1983
Filed:
Jan. 16, 1981
Paul Tholen, Gladbach, DE;
Achim Z Nieden, Cologne, DE;
Klockner-Humboldt-Deutz AG, Cologne, DE;
Abstract
Apparatus for heating the cabin of a vehicle operated by an internal combustion engine. The apparatus includes a pump for circulating hot oil from the engine sump and a heat exchanger for heating cabin air with heat from the oil. A throttle valve is mounted downstream from the pump to heat the oil and provide a source of heat particularly during warm-up periods. Also the apparatus includes an adjustable flow apportioning valve for selectively and adjustably dividing the flow of oil downstream from the throttle valve into two separate streams. The heat from one of the separate streams is then recycled directly into the oil at the pump suction. This arrangement maximizes the efficient useage of the heat generated in the throttle for cabin heating purposes. Also disclosed is an improved throttle valve for use in connection with the heating apparatus.