Invention Grant
- Patent Title: Control method and system for using a pair of independent hydraulic metering valves to reduce boom oscillations
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Application No.: US16047630Application Date: 2018-07-27
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Publication No.: US10724552B2Publication Date: 2020-07-28
- Inventor: Michael Berne Rannow , Meng Wang
- Applicant: Eaton Intelligent Power Limited
- Applicant Address: IE Dublin
- Assignee: Eaton Intelligent Power Limited
- Current Assignee: Eaton Intelligent Power Limited
- Current Assignee Address: IE Dublin
- Agency: Merchant & Gould P.C.
- Main IPC: F15B11/00
- IPC: F15B11/00 ; E02F9/22 ; B66C13/06 ; E04G21/04 ; F15B11/044

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), and first and second control valves (700, 800). A net load (90) is supported by a first chamber (116, 118) of the hydraulic cylinder, and a second chamber (118, 116) of the hydraulic cylinder 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 control valve may apply a holding pressure and thereby hold the first counter-balance valve closed and the second counter-balance valve open.
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