Patent · US Active

Screw spindle pump, fuel pump assembly, and fuel pump unit

US11339781B2 · kind B2 · utility

2Cited by

2References

19Claims

0Family size

Assignee

VITESCO TECHNOLOGIES GMBH · DE

Inventors

Johannes Deichmann · Lengede, DE
Tim Gonnermann · Treffurt, DE
Norbert Fernau · Nentershausen, DE
Bernd Jäger · Fritzlar, DE

Key dates

Filing date	Jun 25, 2018
Grant date	May 24, 2022
Priority date	—
Expiry date	Jan 19, 2039

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C2240/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A screw-spindle pump stage having a drive spindle and a running spindle which runs opposite the drive spindle and a pump housing for receiving the two screw spindles. The pump housing 16 has an offset interface with centering action, for a statically determined coupling to an electric motor. The pump housing has an offset section functioning as an abutment, which is able to be abutted against the electric motor for the application of an axial preload. At least one pressure region of the abutment section, which is close to the interface and, during a rolling, is encapsulated, and at the same time sealingly enclosed, by a sheet-metal casing, forms a rolling region of the pump, the screw spindles, together with the associated pump housing section, at least partially project from the rolling region of the pump on the suction side.

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