| 摘要 |
PURPOSE:To improve economic efficiency and certainly hold an output lever by inserting a valve cylinder into an insertion hole on a booster piston and locking the flange of the valve cylinder between a locking plate and a booster piston and forming a stopper piece for preventing the slip-off of an output lever onto the locking plate. CONSTITUTION:The body 44 of a valve cylinder 14 is inserted into an insertion hole 41 on a booster piston 5 made of steel plates, and the flange 45 is positioned inside the reinforcing rib 42 of the piston 5 and superposed with the piston 5. The valve cylinder 14 is incorporated onto the piston 5 by locking the locking part 54 of a locking plate 50 with the locking hook 43 of the piston 5 and locking the flange 54 between the locking plate 50 and the piston 5. In this case, the cap part 51 of the locking plate 50 is freely fitted onto the short cylinder part 47 of the valve cylinder 14, and a top wall 51a is formed in the cap part 51. Said top wall 51a prevents the slip-off of an output piston 31 inserted into the cylinder hole 28 of the valve cylinder 14 from the cylinder hole 28. |
