Patent · US Active

Pump unit comprising a main pump and a charge pump with a variable pump capacity

US8231359B2 · kind B2 · utility

5Cited by

3References

8Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Stefan Merz · Heroldsbach, DE
Ulrich Mohn · Grafenau, DE
Rene Scheerer · Freudenstadt, DE
Martin Zug · Hirrlingen, DE

Key dates

Filing date	Apr 22, 2008
Grant date	Jul 31, 2012
Priority date	—
Expiry date	Nov 27, 2028

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF04B2205/06
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A pump unit includes a main pump (4) and a charge pump (5), the pump capacity of which is adjustable via an adjusting element. To adjust the pump capacity of the charge pump (5), an adjusting element of the charge pump (5) is acted upon by an adjusting force which is dependent on the inlet pressure of the main pump (4).

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