HYDRAULIC DEVICE AND CONTROL METHOD OF HYDRAULIC DEVICE
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United States of America Patent
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N/A
Issued Date -
Aug 27, 2020
app pub date -
Feb 13, 2020
filing date -
Feb 25, 2019
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A hydraulic device is provided. Working fluid stored in a fluid storage portion is supplied by a fluid supply portion to a power output portion. The fluid supply portion is driven by a brushless motor. A bypass flow path portion can be switched between a first state of supplying the working fluid from the fluid supply portion to the fluid storage portion and a second state of blocking the fluid supply portion from the fluid storage portion. A control to switch the bypass flow path portion from the first state to the second state after the brushless motor is started and a control to switch the bypass flow path portion from the second state to the first state when the brushless motor is stopped is performed. Backflow of the working fluid from the power output portion to the bypass flow path portion is prevented by a backflow prevention valve.
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