| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve a seat wherein oil is fed to a lift cylinder by stepping with the feet, in which since providing the oil to the lift cylinder is stopped in stepping for each one time, the seat stops for each stopping of the oil and discomfort is given to a treated person. <P>SOLUTION: The hydraulic system for chair lift comprises a step pump having a piston 24 capable of moving to a rise position by the spring force of a spring 22 and lowering when an operation lever is stepped on and held within the cylinder 23, a hollow controlling tube 28 being attached to a piston, a communication aperture 24a being formed in communication with the controlling tube and an oil discharge hole 23a according with the communication aperture when the piston moves to the maximum lowering position being formed in the cylinder, a check valve 7 preventing spillover of the oil, a dwell cylinder 3 which stores the oil flowing out through the check valve from the foot pump, and a lift cylinder 4 which raises a sitting part with oil flowing out through the check valve from the foot pump. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
