Construction machine
US12000118B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2020 |
| Grant date | Jun 4, 2024 |
| Priority date | — |
| Expiry date | Jul 19, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/785
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A construction machine makes it possible for an operator to linearly push a bucket by operating an arm in a pushing direction. A controller is configured to, in case a straight locus is selected by a bucket locus selecting device, calculate a constant flow rate ratio according to a boom initial angle that is an angle of a boom sensed by a boom angle sensor at a time point when an arm is operated in a pushing direction by an operation device, and control the delivery flow rate of a first hydraulic pump such that a hydraulic fluid is discharged from a boom cylinder cap chamber at a flow rate obtained by multiplying a flow rate of a flow supplied to an arm cylinder cap chamber by the flow rate ratio while the arm is operated in the pushing direction and there is no boom operating instruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.