Patent · US Active

Internal gear pump having a lubricant feed from the suction region

US9039398B2 · kind B2 · utility

1Cited by

5References

3Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Rene Schepp · Waiblingen, DE
Kornelius Loew · Schwaigern, DE

Key dates

Filing date	Nov 24, 2011
Grant date	May 26, 2015
Priority date	—
Expiry date	Dec 31, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04C18/103
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An internal gear pump includes a ring gear and a pinion configured to mesh with the ring gear. The ring gear and pinion delimit a pump chamber extending from a suction region to a pressure region. The internal gear pump also includes an axial disk arranged on front faces of the ring gear and the pinion and includes a lubricant feed from the suction region between the axial disk and the ring gear and pinion. The lubricant feed includes a lubricant channel which passes through the axial disk. A wedge gap is delimited between the axial disk and the ring gear and pinion. The wedge gap communicates with the suction region and, when the ring gear and the pinion are driven in rotation, a lubricating film forms between the axial disk and the ring gear and pinion.

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