Valve stack in a mini-excavator directing fluid under pressure from multiple pumps to actuable elements
US6018895A · kind A · utility
18Cited by
40References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1996 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Dec 4, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F9/2296
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A power machine includes a pair of traction motors to provide for travel of the machine. The power machine also includes a boom, an arm and a tool (such as a bucket). The power machine includes a hydraulic power circuit which has a valve stack that enables the boom and at least one of the arm and tool to be operated simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.