| 摘要 |
PROBLEM TO BE SOLVED: To provide a piston device capable of restricting reduction of working efficiency caused by an erroneous acknowledgement.SOLUTION: This invention relates to a piston device comprising a cylinder body 10 having a cylinder hole 2 and a piston 3; and a piston boot 12 having a piston side fixing part 14 installed at the piston 3, a cylinder side fixing part 13 installed at the cylinder body 10, and having a cover part 15 for connecting two fixing parts described above. The cover part 15 is formed with an annular pushing part 16 having an abutting surface against the inner circumferential surface of the cylinder hole 2, a piston side connecting part 23 for connecting the piston side fixing part 14 with the pushing part 16, and a cylinder side connecting part 24 connecting the cylinder side fixing part 13 with the pushing part 16, the piston side connecting part 23 is formed at a more inside part in a radial direction than that of an abutting surface 22, and the cylinder side connecting part 24 is formed at a more outside part in the radial direction than that of the abutting surface 22 and a side opposite to a deep end part of the cylinder hole 2. |
