Pilot control mechanism for boom bounce reduction
US10344783B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 7, 2014 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | Jun 17, 2035 |
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 actuator (110), first and second counter-balance valves (300, 400), first and second control valves (700, 800), and first and second blocking valves (350, 450). A net load (90) is supported by a first chamber (116, 118) of the hydraulic actuator, and a second chamber (118, 116) of the hydraulic actuator may receive fluctuating hydraulic fluid flow from the second control valve to produce a vibratory response (950) that counters environmental vibrations (960) on the boom. The first blocking valve prevents the fluctuating hydraulic fluid flow from opening the first counter-balance valve. The first blocking valve may drain leakage from the first counter-balance valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.