| 摘要 |
PROBLEM TO BE SOLVED: To provide a positive volumetric valve for an aerosol container in which an amount of injection can be changed over in two steps in response to depressing positions at two steps of a stem 20. SOLUTION: A housing 10 stored in an aerosol container 1 into which stored content flows from a base end is provided with an extremity end valve port 16a and a base end valve port 17 displaced toward the base end rather than the extremity end valve port. These valve ports are opened or closed by a valve rod segment 25 formed at the stem segment of the base end rather than a stem hole 2a of a stem 20. Subsequent to an operation in which the extremity end valve port 16a is closed by a valve rod segment 25 for the positive volumetric amount at a first depression operating position of the stem 20, the stem 2a is released from a stem gasket 2. Subsequent to an operation in which the base end valve port 17a is closed by the valve rod segment 25 for the positive volumetric amount at a second depressing operating position where the stem 20 is further depressed, the extremity end valve port 16a is released by an annular notch 25b. |
