VALVE CYLINDER, IMPACT DEVICE AND METHOD
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Dec 2, 2022
filing date -
Dec 2, 2022
priority date (Note) -
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Abstract
A hydraulic system, rock drilling rig, and method for limiting output performance of a hydraulic drilling actuator temporarily under execution of a safety function feature of a hydraulic system is provided. The output performance is limited by limiting produced hydraulic fluid flow in a hydraulic circuit of the hydraulic drilling actuator, whereby a restricted magnitude of the fluid flow is produced at a hydraulic pump. This way a restricted operation mode is enabled and is controlled by a control unit.
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