| 摘要 |
PURPOSE:To eliminate the need for using a ball valve body to reduce the number of members in this part, facilitate an incorporating operation, and jet foam from a jet hole immediately after it is produced for enhancing the quality of the foam in jetting. CONSTITUTION:A valve body 35 of a special shape is used for omitting ball valve bodies of a delivery valve and a suction valve. A partition wall 25 moving up and down in a large-diameter cylinder 14 is provided for partitioning a part below as an air pressurizing chamber A. The inner peripheral edge of the partition wall 25 is loosely and vertically movably fitted in a recessed groove 38 peripherally formed on the outer periphery of a fitting cylindrical part 27 extending from a stem 22 with a small gap connecting the inside to the outside. When a head 23 is pressed down, the gap is opened to the air pressurizing chamber A. When it is lifted, the gap is blocked. In this manner, a ball valve for the suction valve is omitted. In addition, a foam producing layer 44 is provided in the vicinity of a jet hole of a nozzle 32. |
