Hydraulic system and method for reducing boom bounce with counter-balance protection
US11028861B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2019 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Dec 9, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/8616
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic system (600) and method for reducing boom dynamics of a boom (30), while providing counter-balance valve protection, includes a hydraulic cylinder (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and a selection valve set (850). The selection valve set is adapted to self-configure to a first configuration and to a second configuration when a net load (90) is supported by a first chamber (116, 118) and a second chamber (118, 116) of the hydraulic cylinder, respectively. When the selection valve set is enabled in the first and second configurations, the second and first control valve may fluctuate hydraulic fluid flow to the second and first chamber, respectively, to produce a vibratory response (950) that counters environmental vibrations (960) of the boom. When the selection valve set is not enabled, the first and second counter-balance valves are adapted to provide the hydraulic cylinder with conventional counter-balance valve protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.