Patent · US Expired

Metering valve with a hydraulic transmission element

US7669783B2 · kind B2 · utility

5Cited by

5References

18Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Bernhard Fischer · Wien, AT
Bernhard Gottlieb · Munich, DE
Andreas Kappel · Höhenkirchen-Siegertsbrunn, DE
Hans Meixner · Haar, DE
Randolf Mock · Munich, DE

Key dates

Filing date	Feb 11, 2003
Grant date	Mar 2, 2010
Priority date	—
Expiry date	Feb 11, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/703
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to an injection valve which has a piezo actuator that is functionally connected to a nozzle needle by a hydraulic transmission device. The hydraulic transmission device is connected to a pressure reservoir by a sealing gap so that the pressure differences between the pressure reservoir and a hydraulic chamber of the hydraulic transmission device are compensated in the long term.

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