| abstract |
In a flow controller mounted in a valve assembly for aerosol container, a stem body and a piston are inserted in a housing of the valve assembly in placing a spring between the stem body and the piston. The piston is formed with a controlling sleeve at a bottom of which an introduction hole for flowing the aerosol contents is opened in the piston. The controlling sleeve can enter into an insertion space formed between a cylinder formed at the stem body and an insertion member. Inner and outer round passageways capable of communicating with one another, are formed between the inner round surface of the controlling sleeve and the outer round surface of the insertion member and between the outer round surface of the controlling sleeve and the inner round surface of the cylinder, respectively. The controlling sleeve enters into the insertion space and changes communication resistance against the aerosol contents' flow according to the pressure of the aerosol contents, thereby maintaining a spray rate from the beginning to the last minute of spraying operation, as well as rendering the flow of the aerosol contents smooth and stable in making the whole assembly compact. |