Patent · US Expired

Electrohydraulic control device

US6837269B2 · kind B2 · utility

8Cited by

1References

17Claims

0Family size

Assignee

DBT GMBH · DE

Inventors

Werner Reinelt · Bochum, DE
Franz-Heinrich Suilmann · Werne, DE

Key dates

Filing date	Mar 15, 2002
Grant date	Jan 4, 2005
Priority date	—
Expiry date	Mar 15, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87209
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An electrohydraulic control device for use in the hydraulic systems of advancing support frames of underground mining equipment, which can be switched by means of switching plungers of electromagnets (24), and the directional control valves (3, 4) are put together from pilot control valve (14) and main control valves (3) arranged on a common axis, where by the pilot control valve (4) switches the main control valve (3) by means of a separate pressure medium supply to be found on an additional control pressure line, in which accepting borings (2) are suited for the acceptance of main control and pilot control valves (3, 4) constructed as cartridges which are plugged together.

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