Hydraulic control valve system with pressure compensator
US6098403A · kind A · utility
11Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87185
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved pressure-compensated hydraulic system includes a separate valve section which feeds hydraulic fluid from a variable displacement pump to one of several hydraulic actuators. Each valve section has a main valve spool and a pressure compensating poppet. The main valve spool has a metering orifice that controls the flow of fluid to the actuator. The poppets in the valve sections collectively apply a pressure to the pump pressure control input which is a function of the greatest to a load pressure among the hydraulic actuators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.