Construction machine
US9394670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2015 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Feb 2, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/6658
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Provided is a construction machine comprising an energy recovery device for recovering hydraulic fluid energy from a hydraulic actuator and being capable of achieving excellent operability even when the power of the prime mover is changed. The construction machine comprises an engine 1, a hydraulic pump 2, a plurality of hydraulic actuators 31-34, a plurality of control valves 41-44, a plurality of operating devices 71-74, an energy recovery device 80, an operation mode selector switch 76, an engine revolution speed dial 77, a pressure sensor 75, and a controller 90 which controls the flow rate of hydraulic fluid recovered by the energy recovery device based on input signals from the operation mode selector switch, the engine revolution speed dial and the pressure sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.