| 摘要 |
Washer in which a hollow cylinder (5) is supplied with a fluid washing medium and fitted with a piston (6). A first spring (16) is fitted between the piston and the cylinder and constantly presses the piston in the retraction direction.A valve device (14) is arranged in the fluid feed passage to the cylinder to open and close the fluid flow path. The valve body is made from an elastic material. A second spring (19) is placed between the piston and the valve in order to maintain a constant pressure on the valve in the closure direction. |
