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:
Aug. 02, 2022
Filed:
Dec. 05, 2019
Applicant:
Audi Ag, Ingolstadt, DE;
Inventors:
Thomas Hoffmann, Riedenburg, DE;
Sebastian Wawersig, Ingolstadt, DE;
Assignee:
AUDI AG, Ingolstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04C 2/16 (2006.01); F01P 5/10 (2006.01);
U.S. Cl.
CPC ...
F04C 2/16 (2013.01); F01P 5/10 (2013.01); F01P 2050/24 (2013.01); F04C 2230/91 (2013.01);
Abstract
A drive device for a motor vehicle, having at least one drive unit and one coolant circuit for controlling the temperature of the at least one drive unit, in which at least one coolant pump is arranged in the coolant circuit for circulating an aqueous coolant in the coolant circuit. The coolant pump is designed as a screw spindle pump, in which one or more internal components are provided with a coating. The coating is designed to intentionally abrade during operation of the screw pump, thereby transferring the coating to uncoated components, while also retaining sufficient coating on the originally coated component.