HYDRAULIC OIL SUPPLY DEVICE FOR INDUSTRIAL VEHICLE
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Jan 18, 2023
filing date -
Jan 18, 2023
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Abstract
A hydraulic oil supply device for an industrial vehicle includes: a first hydraulic oil tank; a second hydraulic oil tank; an upper communication pipe; a lower communication pipe; a first hydraulic oil pipe configured to communicate the first hydraulic oil tank with a hydraulic oil supply target and to be provided with a suction port; a second hydraulic oil pipe configured to communicate the hydraulic oil supply target with the second hydraulic oil tank and to be provided with a discharge port; and a hydraulic oil pump. The second hydraulic oil tank is an airtight tank sealed hermetically against outside air. The upper communication pipe has a first open-end portion and a second open-end portion. The first open-end portion has an opening height higher than an opening height of the suction port. The second open-end portion has an opening height higher than an opening height of the discharge port.
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