| 摘要 |
PURPOSE:To prevent generation of knocking noise due to vibration of a piston rod by composing a leaf valve of a main leaf valve and a subleaf valve, overlapped across the back surface of the main leaf valve, and forming a small hole, opposed to a port, in the main leaf valve. CONSTITUTION:An extension side leaf valve 10 is composed of three sheets of piston side main leaf valves (a), (b), (c) and one sheet of subleaf valve (d), brought into contact with the back surface of the main leaf valve (c), and a sufficiently small hole (e), opposed to one of extension ports 6, is formed respectively in each of main leaf valves (a), (b), (c). Each piston insertion hole (f) of D-shaped side surface is formed in each of main leaf valves (a), (b), (c), a piston rod 3 of D-shaped section is inserted to this hole (f), and position displacement of each of leaf valves (a), (b), (c) is prevented. That is, each small hole (e) is surely opposed to the extension port 6. |
