Patent · US Active

Valve arrangement

US8464753B2 · kind B2 · utility

4Cited by

12References

20Claims

0Family size

Assignee

ABB TECHNOLOGY AG · CH

Inventors

Matthias Schmidt · Munich, DE
Niels Wahlefeld · Neuss, DE
Franz-Josef Koerber · Schongau, DE

Key dates

Filing date	Mar 12, 2010
Grant date	Jun 18, 2013
Priority date	—
Expiry date	Oct 4, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87225
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A valve system for activating a piston of a piston-cylinder arrangement for a hydraulic or fluid device includes a pilot control valve including 3/2-way valve and a main valve arrangement having a first and a second main valve. The first and second main valves include 2/2-way valves, wherein in a first position the pilot-control valve is configured to move the first main valve into an open position so as to direct a path for a high pressure fluid to a space above the piston, and wherein in a second position the pilot-control valve is configured to connect the space to a low-pressure tank so as to relieve a pressure in the space above the piston via the second main valve, and wherein the pilot-control valve is configured to open the second main valve and configured to close the first main valve.

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