Patent · US Expired

Valve arrangement and pump for a gear system

US6280159A · kind A · utility

4Cited by

7References

31Claims

0Family size

Assignee

Luk Fahrzeug-Hydraulik GmbH & Co. KG · DE

Inventors

Ivo Agner · Bogen, DE
Andreas Hampel · Schömberg, DE
Martin Schindler · Kurort Hartha, DE
Axel Fassbender · Offenbach, DE
Bernd Denfeld · Bad Homburg vor der Höhe, DE

Key dates

Filing date	Oct 15, 1998
Grant date	Aug 28, 2001
Priority date	—
Expiry date	Oct 15, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/7722
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

The invention relates to a valve arrangement with a pressure limiting valve and a flow regulator valve, which comprises a flow regulator piston, having at least one first hydraulic resistor, distinguished in that the flow regulator valve's (5) flow regulator piston (15) has a split pressure return surface and in that the first part (ring surface (45)) of the pressure return surface is capable of working at a pressure p1 and a second part (annulus surface (31)) of the pressure return surface is capable of working at a pressure p2.

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