Patent · US Expired

Hydraulic system for a power-take-off clutch

US6095297A · kind A · utility

1Cited by

6References

1Claims

0Family size

Assignee

AGCO Corporation · US

Inventors

Theodor Bosl · Marktoberdorf, DE
Jakob Mayer · Kreßbronn, DE
Johann Reisch · Marktoberdorf, DE

Key dates

Filing date	Apr 21, 1999
Grant date	Aug 1, 2000
Priority date	—
Expiry date	Apr 21, 2019

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60K2025/026
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A hydraulic system for a power-take-off in a utility vehicle is described, having a pump (8) supplying hydraulic fluid to the clutch (1), the brake (2) and a lubricating circuit, a control valve for engaging and releasing the clutch and a device containing a pressure-limiting valve (12) which makes a high system pressure available when the clutch is engaged and a lower system pressure when the clutch is released. In order to keep loss of power in the pump as low as possible and reduce the number of components required in a hydraulic system of this type, the system pressures are controlled by the pressure applied to the engaged clutch. Consequently, the system pressures can be adjusted regardless of the design of control valve used. This means that less expensive 3/2-way valves or 3/2-control valves can be used. This also has an advantage in that different system pressures can be produced using a single pressure-limiting valve. The hydraulic system is suitable for all types of utility vehicle with a power-take-off.

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