| 摘要 |
A dispensing valve is described for simultaneously dispensing from a pressurised container two flowable substances in fixed quantity ratio. In a preferred embodiment a rigid valve stem 31 moves longitudinally in a resilient housing which is sealingly secured to a lid closing an opening in the container, and a number of longitudinally spaced resilient gasket flanges 23, 24 extend inwardly within the central opening of an inner casing portion 13 of the housing, each flange having axially extending gasket surface 29 and a radially extending gasket surface 28 of smaller diameter which seals against the shaft of the stem. The stem shaft has sealing flanges 33, 34 which seal with their faces against the axially extending gasket surfaces. Outlet passageways 35, 36 in the shaft open into an annular space between the two gasket surfaces of each gasket flange when the valve is in the closed position. Openings in the casing wall lead to the substance containers, which are one inside the other. The quantity ratio is determined by choice of the outlet passageway opening sizes. <IMAGE> |
