Hydraulique drive device
US6244048A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1998 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Jan 23, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/2292
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hydraulic drive system for a supersized hydraulic working machine such as a hydraulic excavator includes hydraulic pumps connected to main lines through a delivery line and a supply line. Branch portions from the main line include flow control valves for allowing a hydraulic fluid to flow from the hydraulic pumps toward hydraulic cylinders. A hydraulic reservoir is connected to the main lines through a reservoir line and a drain line. Other branch portions for the drain line include flow control valves for allowing a hydraulic fluid to flow from the hydraulic cylinders toward the hydraulic reservoir. A line branched for the delivery line includes a bypass valve for supplying the hydraulic fluid delivered from the hydraulic pumps to the supply line at a desired flow rate and returning the remaining hydraulic fluid to the hydraulic reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.