Hydraulic system for a mobile rescue stretcher and mobile rescue stretcher
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United States of America Patent
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Jun 20, 2023
Grant Date -
Nov 3, 2022
app pub date -
Feb 11, 2022
filing date -
Apr 29, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic system for a mobile rescue stretcher has a hydraulic cylinder, with first and second working chambers, a tank and pump. The first and second chambers are connected to the pump via first and second line arrangements, respectively, and can be pressurized by the pump. Hydraulic fluid flows out of the first chamber via the first line arrangement when pressure is applied to the second chamber. The first line arrangement has a first check valve which opens when pressure is applied to the second line arrangement. Hydraulic fluid flows out of the second chamber via the second line arrangement when pressure is applied to the first chamber. The second line arrangement has a first branch line connected to the pump and a second branch line connected to the tank. A pressure valve in the second branch line opens when pressure is applied to the second line arrangement.
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