Hydraulic system for utility vehicles
US6405529B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2000 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Jul 17, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/71
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic system for a utility vehicle supplies primary and auxiliary hydraulic actuators with hydraulic fluid and includes a pump, the pressure of which is controlled with respect to the load pressure of the primary and auxiliary hydraulic actuators. The pressure of the hydraulic fluid from the pump exceeds the load pressure by a predetermined control pressure differential. Valves arc provided for producing two control pressure differentials of different values. When the prevailing load pressure of the auxiliary hydraulic actuator and a highest load pressure of the primary hydraulic actuator is less than the sum of the load pressure of the auxiliary hydraulic actuator and the control pressure differential of the auxiliary hydraulic actuator minus the control pressure differential of the primary hydraulic actuator, the control pressure differential is increased with respect to die control pressure differential in cases where the load pressure of the auxiliary hydraulic actuator does not prevail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.