Proportional hydraulic control
US5167121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1991 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Jun 25, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/2221
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulic control system for a multi-linked manipulator arm monitors the desired flow of hydraulic fluid to each of the actuators for the links of the manipulator, and when the desired flow to any one or more of the actuators exceeds the available flow to the respective actuators, the flows to all the actuators are reduced on the basis of a scaling factor based on the ratio of the available flow to the desired flow of that actuator having the maximum ratio of its desired to available flows so that the relative speed of all the actuators for manipulating the arm is maintained. In some cases some actuators may have higher priority than others and a second scaling factor in which such priorities have been applied may also have to be applied to the flows to reduce the relative speeds of all actuators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.