| 摘要 |
A lower frame (10 Fig 1) is connected to an upper frame 12 by a first pair of parallel cross links 14 and a second parallel cross links 16. A hydraulic cylinder 38 can have a piston (40 Fig 5) extended therefrom to cause the upper frame to be raised. A pump lever 64 can be depressed to cause the raising of the upper frame with the lever also being actuatable to permit lowering. Control means are included to enable an operator to control the rate of movement of the upper frame relative to the lower frame. A sensor which may comprise a strain gauge or an hydraulic fluid pressure sensor is provided to indicate the weight of the patient or to indicate when a patient is too heavy for the specified weight of the trolley. |
