| 摘要 |
PURPOSE:To improve reliability ever so better, by installing each fitting part in a piston and a cylinder too, while putting both these fitting parts together and making an orifice area variable in a way of rotating them in a relative manner. CONSTITUTION:A convex fitting part 5 is installed in a piston 4, while a concave fitting part 6 is installed in a rod holder 2 of a cylinder 9. And, the convex fitting part 5 and the concave fitting part 6 are fitted with each other and rotated relatively, whereby an orifice area is made so as to be altered. With this constitution, a mechanism comes simple enough so that reliability is improved and, what is more, an oil leakage in relation to a variable mechanism is brought to nothing. |
