초록

An armature has an inner chamber which becomes effective to delay the otherwise full fluid force against such armature thereby enabling the armature to more readily move closer, in a shorter period of time, to the associated pole piece.

대표청구항 ▼

A solenoid assembly comprising electrically energized and de-energized field coil means, pole piece means providing a magnetic flux path whenever said field coil means is energized, valve means movable to and from cooperating valve seat means for at times to be open permitting the flow past the valv

A solenoid assembly comprising electrically energized and de-energized field coil means, pole piece means providing a magnetic flux path whenever said field coil means is energized, valve means movable to and from cooperating valve seat means for at times to be open permitting the flow past the valve means of a relatively high pressure fluid supplied by an associated source, wherein said valve means when moved to engagement with said valve seat means is effective for preventing the flow of said relatively high pressure fluid past said valve means, cylindrical armature means movable toward said pole piece means upon energization of said field coil means and movable to a relatively remote position wherein said armature means is spaced most from said pole piece means upon de-energization of said field coil means, motion transmitting means effective for causing said valve means to become open, wherein said motion transmitting means is operatively situated between said armature means and said valve means whereby sufficient axial movement of said armature means toward said pole piece means results in said motion transmitting means opening said valve means, wherein when said field coil means is electrically energized and said armature means responds by moving toward said pole piece means said relatively high pressure fluid tends to resist the movement of said armature means toward said pole piece, and chamber means formed in said armature means as to have a first axial end continually closed to the flow of said fluid therethrough and as to have a second axial end continually open to the flow of said fluid into and out of said chamber means, said chamber means being effective for delaying the time at which the full magnitude of said relatively high pressure fluid is fully applied to said armature means thereby enabling said armature means to move toward said pole piece means an initial distance during which said full magnitude of said relatively high pressure fluid is not fully applied to said armature means.