Hydraulic power shovel with tamping function
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United States of America Patent
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Dec 26, 2023
Grant Date -
Jun 10, 2021
app pub date -
Dec 8, 2020
filing date -
Dec 9, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic power shovel includes a frame, a power cylinder, a hydraulic installation, and a control unit. The frame is configured to support a turret equipped with an arm terminated by a tool, such as a bucket having a tamping surface. The power cylinder is linked to the arm and is configured to press on the turret. The hydraulic installation includes an adjustable flow pump configured to supply the power cylinder via a slide valve and a hydraulic liquid tank. The control unit is linked to (i) a control member actuated by the operator and configured to generate a control signal, and (ii) a sensor configured to generate a sensor signal corresponding to a pressure and temperature of hydraulic liquid in the power cylinder. A vapour pressure diagram of the hydraulic liquid is available in the control unit.
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