Patent · US Active

Double internal gear pump

US8827376B2 · kind B2 · utility

1Cited by

5References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Dirk Foerch · Fürstenau, DE
Rene Schepp · Waiblingen, DE
Norbert Alaze · Markgröningen, DE

Key dates

Filing date	Sep 27, 2010
Grant date	Sep 9, 2014
Priority date	—
Expiry date	Apr 16, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C2230/60
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A double internal gear pump has two internal gear pumps having a common pump shaft. A partition is formed between the two internal gear pumps, and the partition has a frustoconical circumferential surface which contacts an opposing in a sealing manner in a pump housing. Pump inlets and pump outlets can be led through the partition. The frustoconical circumferential surface of the partition is advantageous because it removes the necessity of pressing into the pump housing and canting the partition. In addition, a seal on the circumference of the partition is ensured with great realiability.

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