Working machine
US11796056B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2023 |
| Grant date | Oct 24, 2023 |
| Priority date | — |
| Expiry date | Mar 8, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/6615
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A working machine includes: a machine body provided thereon with a traveling pump and a traveling motor; a traveling change-over valve shiftable between a first state where a rotation speed of the traveling motor is set to a first speed and a second state where the rotation speed is set to a second speed; an actuation valve operable to control a flow of operation fluid to an operation valve that changes a pressure of operation fluid to be applied to the traveling pump according to operation of an operation member; and a controller to perform a shock-mitigation control for reducing an opening degree of the actuation valve when the traveling change-over valve is shifted from the first state to the second state. The controller determines a reduction amount of the opening degree of the actuation valve reduced by the shock-mitigation control, based on a straight-traveling degree of the machine body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.