| 摘要 |
PROBLEM TO BE SOLVED: To perform a series of operations in the stroke of reciprocating operation of a piston without requiring operation from other drive section and to perform suction operation stably while reducing the sliding load, and the like. SOLUTION: The cylinder pump is provided with a discharge valve mechanism being closed while interlocking with movement of a piston in the same direction of suction stroke. The discharge valve mechanism comprises a drain head 482 for closing the discharge port, a constant pressure spring 485, a drain trigger 482 for operating the drain head, and a drain subtrigger 483 for stopping the drain head not to operate by the drain trigger. Only when the piston moves in the suction stroke, the drain trigger operates to release the drain head thus closing the discharge valve. COPYRIGHT: (C)2006,JPO&NCIPI |
