| 摘要 |
PURPOSE:To simplify working of cylinder block while to facilitate maintenance/ inspection, by forming common tank port and pump port at the rear of a cylinder hole then assembling the suction side check valve and delivery side check valve integrally to construct a check valve device. CONSTITUTION:In a check valve device 10, a suction path 26 opening to a circular suction groove 21 in a tank port 11 and a discharge path 27 conducting between a circular discharge groove 23 and a cylinder hole 5 are made in a valve body 25 where check valves 28, 29 are provided respectively in the suction and discharge paths 26, 27. In suction process of plunger 6, said path 27 is choked by said valve 29 to suck operating oil from the tank port 11 into the cylinder hole 5 while in delivery process said path 26 is choked by said valve 28 to move said valve 29 against pressing force of a coil spring 35 thus to feed out operating oil from said path 27 through a pump port 12. |
