| 摘要 |
The invention relates to a magnetic valve assembly of the type in which an energized armature moves a valve closure member to an open position and a load spring in compression maintains the valve closure member closed when the armature is nonenergized. Relative movement between the armature member and the closure member is provided and an energy storing spring between these members resists the relative movement. In two embodiments the energy storing spring is stressed in compression in one and in tension in the other. The valve closure member does not begin to move until the armature causes the energy storing spring to be stressed to an extent equal to a predetermined stressing of the load spring. With this mode of operation the armature stroke is longer than the stroke of the closure member and this results in a smaller magnetic system being sufficient for a given valve system. |
