Vibration suppression apparatus for hydraulic system with improved accumulator filing circuit
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United States of America Patent
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Sep 21, 1993
Grant Date -
N/A
app pub date -
Aug 24, 1992
filing date -
Sep 5, 1991
priority date (Note) -
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Abstract
A hydraulic control circuit for building machinery includes a hydraulic cylinder to operate a tool. To stabilize vibrations of the tool around the pitch axis, a hydraulic accumulator is provided to be connected to a pressure source via a fill line. A shut-off valve is disposed in the fill line, which valve is subjected to the pressure in the accumulator such that in operating the cylinder the accumulator is loaded to a pressure corresponding to the load pressure. The system is very simple in structure and fluid losses are eliminated.
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