Hydraulic control system for at least two consumers
US4120233A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1977 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Jun 24, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S60/911
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Each consumer is provided with a load-compensated direction-reversing valve. Each valve performs a throttling function and a pressure-compensation function in order to establish a selected volumetric flow rate, and also a direction-control function. Each valve comprises a first control valve stage and a second control valve stage. One stage performs the throttling function, the other the pressure-compensation function. One of the two control valve stages also performs the direction-control function. The pressure drop across the stage which performs the throttling function at least in part controls the setting of the stage which performs the pressure-compensation function. Each valve is provided with an electromechanical transducer generating electrical signals indicative of the settings of the stage which performs the pressure-compensation function. These signals are evaluated by an electrical information-processing unit, and the results of the evaluations are used to automatically adjust the setting of a line pressure regulating valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.