Patent · US Expired

High-pressure pump for a fuel-injection device of an internal combustion engine

US7284537B2 · kind B2 · utility

4Cited by

4References

20Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Thomas Kleinbeck · Lambach, DE
Markus Koch · Neu-Ulm, DE
Wolfram Rittmannsberger · Stuttgart, DE

Key dates

Filing date	Jun 22, 2004
Grant date	Oct 23, 2007
Priority date	—
Expiry date	Jun 22, 2024

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05C2253/12
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A high-pressure pump having a rotationally driven drive shaft with a shaft portion embodied eccentrically to its axis of rotation, on which shaft portion a ring is rotatably supported. At least one pump element, has a pump piston, driven at least indirectly in a reciprocating motion by the drive shaft via the ring and resting at least indirectly on the ring. The ring is provided, at least on its outer face facing away from the shaft portion, with a coating of a friction-reducing paint in at least one region, in which the at least one pump piston rests at least indirectly on the ring.

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