Hydraulic circuit with compensator valve biased with highest pressure acting on actuators
US5243820A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1991 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Jun 18, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/7053
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
When a hydraulic circuit for driving actuators of a construction machine or the like includes a single hydraulic pump and a plurality of direction changeover valves connected to the hydraulic pump for controlling the respective actuators, operation of one of the direction changeover valves may result in undesirable change in the output oil pressure of the other direction changeover valves. The inventive hydraulic circuit includes means for driving a regulator of the hydraulic pump in response to any oil puressure change at the inlets of the direction changeover valves corresponding to the output oil pressure change, thereby compensating for the pressure change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.