Patent · US Active

Screw pump with abradable coating

US11401932B2 · kind B2 · utility

0Cited by

1References

20Claims

0Family size

Assignee

AUDI AG · DE

Inventors

Thomas Hoffmann · Berlin, DE
Sebastian Wawersig · Ingolstadt, DE

Key dates

Filing date	Dec 5, 2019
Grant date	Aug 2, 2022
Priority date	—
Expiry date	Dec 5, 2039

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C2230/91
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.