Patent · US Expired

Hydraulically actuatable directional control valve

US5913333A · kind A · utility

11Cited by

7References

1Claims

0Family size

Assignee

Mannesmann Rexroth AG · DE

Inventors

Rainer Biener · Süderbrarup, DE
Richard Rauscher · Gemünden am Main, DE
Winfried Rüb · Waldshut-Tiengen, DE

Key dates

Filing date	Sep 18, 1997
Grant date	Jun 22, 1999
Priority date	—
Expiry date	Sep 18, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/87241
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

In a hydraulically actuatable directional control valve the servo-piston of which is to be controlled by electromagnetically actuatable pilot valves of small nominal size developed as insertion cartridges integrated in the directional control valve housing, the hydraulic connection between the pilot valves and the directional control valve are effected via channels extending in the directional control valve housing, the channels in the directional control valve housing are produced as cast channels, in particular for mass production, and the connections of the pilot valves are adapted to the size and arrangement of these channels.

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