| 摘要 |
PROBLEM TO BE SOLVED: To provide a run-around circuit capable of compactifying a power generator, and capable of simplifying also a control mechanism thereof. SOLUTION: This run-around circuit 1 is connected to the power generator 5 having a cylindrical hollow cylinder 2, a piston 3 for partitioning an inner space of the cylinder 2 into the first space 2a and the second space 2b, and advanced or retracted in the cylinder 2, and a power transmission shaft 4 connected to the piston 3, and the run-around circuit 1 includes a port pilot change-over valve 6 (direction switching valve) provided with a pilot change-over valve and the second change-over valve having respectively four ports of A, B, P, T, a pilot operation check valve 9, a pilot operation sequence valve 10 provided with a check valve 11, flow routes a-g, i for connecting the ports, and pilot pipe lines k, n, m, j for feeding a liquid 17 to the respective pilot ports to make pilot pressure act thereon. COPYRIGHT: (C)2010,JPO&INPIT
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