Patent · US Expired

Hydraulic control circuit for a priority and for a secondary hydraulic consumer

US6289675A · kind A · utility

11Cited by

2References

10Claims

0Family size

Assignee

Mannesmann Rexroth AG · DE

Inventors

Werner Herfs · Lohr am Main, DE
Jacques Maffini · Lohr am Main, DE
Thomas Weickert · Karsbach, DE

Key dates

Filing date	Jul 27, 1999
Grant date	Sep 18, 2001
Priority date	—
Expiry date	Jul 27, 2019

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF15B2211/75
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

The invention concerns a hydraulic control circuit in which the pressure medium conveyed by a hydraulic pump of variable delivery (10) is fed, in each case via a metering aperture (17, 31), as a priority to a first hydraulic consumer (14) and only secondly to a second hydraulic consumer (15). A priority control system is now produced without additional delivery losses and with sufficient amounts of pressure medium being conveyed in that the valve member (48) of the priority valve (45) can be acted upon in the closure direction of the connection between the first connection (46) and the second connection (47) by a pressure prevailing in a line section (13) upstream of the first metering aperture (17).

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