Patent · US Expired

Safety arrangement for power assisted steerings

US4625748A · kind A · utility

2Cited by

1References

8Claims

0Family size

Assignee

Mannesmann Rexroth AG · DE

Inventors

Ludwig Muncke · Lohr am Main, DE
Norbert Mucheyer · Lohr am Main, DE
Wolfgang Kauss · Francheville, FR

Key dates

Filing date	Aug 22, 1985
Grant date	Dec 2, 1986
Priority date	—
Expiry date	Aug 22, 2005

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/2524
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

In the supply of a power-assisted steering and an additional hydraulic system with fluid the power-assisted steering has priority so that when the steering is actuated the influx of fluid to the hydraulic system is correspondingly throttled by a priority valve. When a leak occurs in the hydraulic system, the influx of fluid to the hydraulic system is completely shut off when the oil level in the reservoir drops to a lower limit value. The closure of the priority valve is effected by a switch valve which is disposed in one of the control pressure lines of the priority valve and which is rendered currentless on response of the sensor for the fluid level.

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