Load-sensing active hydraulic control device for multiple actuators
US5347811A · kind A · utility
31Cited by
8References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1992 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Dec 28, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/71
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A device for controlling multiple hydraulic actuators to protect a system from an overpressure caused by increasing the load on an individual actuator. By controlling the supply of hydraulic fluid to a pair of cylinders each associated with a pilot valve so that each cylinder always has enough fluid pressure to operate, the device of the present invention prevents the shutdown of the device caused by too much fluid going to the actuator operating at the maximum pressure. Thus all actuators continue to operate even if one is overpressured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.