| 摘要 |
PURPOSE:To facilitate work for assembling a piston part, by respectively providing annular retainers in a cylinder part and a rod part and interposing a compression spring between the both retainers. CONSTITUTION:A cylindrical retainer 26 is assembled between a flange part 22b in a rod part 22 and the bottom surface of a piston part 21 by a nut 27 through a gasket 25. Then a compression spring 17 of large contour is interposed between an inward facing flange part 12b formed in the bottom end of a cylinder liner 12 and an outward facing flange part 26b of the retainer 26. In this way, the piston part 21, causing no reaction force of the spring to act on the piston part 21 when it is fitted into the cylinder liner 12, can be easily assembled by only dropping down the piston part 21 into the cylinder liner 12. |
