Patent · US Expired

Directional-control valve

US6916003B2 · kind B2 · utility

1Cited by

5References

16Claims

0Family size

Assignee

Bosch Rexroth Corporation · DE

Inventors

Peter Graf · Orinda, US
Herbert Reder · Rothenfels, DE
Rainer Imhof · Frammersbach, DE
Hans-Georg Schubert · Partenstein, DE
Frank Schwab · New York, US

Key dates

Filing date	Sep 4, 2001
Grant date	Jul 12, 2005
Priority date	—
Expiry date	Oct 10, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/86541
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

Disclosed is a directional control valve comprising a front-side connector and at least one radial connector, wherein the front faces of a valve body (valve shift or seat body) of the directional control valve are pressurized approximately equally, so that the actuating forces for shifting the valve body are minimal. In accordance with the invention, the pressure for pressurizing a rearward front face of the valve body is tapped at an axial distance to the valve body.

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