Slide valve for load sensing control in a hydraulic system
US4719753A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1986 |
| Grant date | Jan 19, 1988 |
| Priority date | — |
| Expiry date | Feb 20, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B13/0418
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic or the like drive system which can include a variable-speed pump with at least one control element. The control element can be connected to a pump control piston arranged in a pump control cylinder, the position of which is determined by a control pressure. The drive system can further include a conveying conduit connected to the pump and a return conduit which leads to the respective reservoir, and can furthermore include control elements, with the conduit emanating from the pump are connected--by intervention of a respective branch line--several demand points which respectively can be connected to the conveying conduit by means of an in the respective branch line arranged, randomly movable valve. The valve has two auxiliary pistons arranged in the main piston of the valve and each auxiliary piston houses a reversing piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.