Safety device of vehicle with aerial work platform
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United States of America Patent
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Oct 18, 2022
Grant Date -
Sep 9, 2021
app pub date -
Mar 6, 2020
filing date -
Mar 6, 2020
priority date (Note) -
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Abstract
In a vehicle with aerial work platform, while not receiving an operation instruction to move down the work platform from the rise and fall operating device, when moving down of the work platform is detected based on the detecting result of the rise and fall position detecting device, the rise and fall control device controls the first switching valve to switch so that the bottom-side oil chamber is connected to the hydraulic pump and controls the second switching valve to switch to the first state so as to make oil pressure in the bottom-side oil chamber be kept by the second switching valve and the check valve. Then, the rise and fall hydraulic cylinder is stopped to be contracted.
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