HYDRAULIC TYPE CAR LIFT

PURPOSE:To supply the residual pressure by a prescribed pressure by only operating a stop valve by installing a stop valve in series with a check valve group which is constituted of the first check valve and the second check valve. CONSTITUTION:When the working liquid in the second circuit 35 becomes short of, the first hydraulic cylinder 24 does not lower to the lowest point even if the second hydraulic cylinder 26 lowers to the lowest point, and stops midway. When such phenomenon is generated, a stop valve 40 is opened in the state where no automobile is loaded. When a pump 31 is operated, the working liquid flows into the first hydraulic cylinder 24, and the cylinder rises, and at the same time, the working liquid is supplied into the second hydraulic cylinder 26, passing through the first check valve 38 in a bypass circuit 37 from the first circuit 32, together with the working liquid pushed out from the first hydraulic cylinder 24. Therefore, the cylinder of the second hydraulic cylinder 26 rises at the higher speed than the rising speed of the cylinder of the first hydraulic cylinder 24.