Milling machine having a hydraulic dampening system
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United States of America Patent
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Feb 21, 2023
Grant Date -
Sep 30, 2021
app pub date -
Mar 30, 2020
filing date -
Mar 30, 2020
priority date (Note) -
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status (Latency Note)
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Abstract
A milling machine may have a frame, first and second ground engagement members connected through respective, vertically adjustable leg columns to a front end of the frame, and third and fourth ground engagement members connected through respective, vertically adjustable leg columns to a rear end of the frame. Each vertically adjustable leg column includes a hydraulic cylinder connecting the frame and the associated ground engagement member. A milling drum is attached to the frame between the front and rear ends. At least one pair of the leg columns connected to the front end of the frame or the leg columns connected to the rear end of the frame includes an accumulator associated with each of the at least one pair of leg columns, a fluid conduit fluidly connecting a bore end of each of the hydraulic cylinders to the associated accumulator, and a control valve disposed in the fluid conduit and configured to control a flow of fluid between the hydraulic cylinders and the associated accumulators.
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