| 摘要 |
PROBLEM TO BE SOLVED: To eliminate variations in actuation resistance values caused by diameters of a piston and a cylinder, while reducing an influence of a stabilizer by suppressing occurrence of flow resistance of working fluid during compression stroke of a lock cylinder. SOLUTION: A piston 1 of the lock cylinder comprises a main body 1a partitioning an extension side chamber R1 and a pressure side chamber R2, a cylinder part 1b vertically provided from the main body 1a, a land 1g provided to the cylinder part 1b and brought into slide contact with a cylinder 31, a groove 1c partitioned between the main body 1a and the land 1g to be opened and closed by a communicating hole 31a, a passage formed in the cylinder part 1b to communicate the groove 1c with the pressure side chamber R2. The axial width of the land 1g is set smaller than the inside diameter of the communicating hole 31a. COPYRIGHT: (C)2004,JPO
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