Hydraulic apparatus
US10519990B2 · kind B2 · utility
1Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2015 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Aug 15, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/88
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The hydraulic apparatus is set so that the ratio of the pressure-receiving area of the respective bottom oil chambers of the boom cylinder, the arm cylinder and the bucket cylinder to the pressure-receiving area of the respective rod oil chambers matches the ratio of the extruded volume drawn into or discharged from the bottom oil chambers per single rotation by the respective extrusion members of the first hydraulic pump motor, the second hydraulic pump motor and the third hydraulic pump motor to the volume discharged from or drawn into the rod oil chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.