Patent ID: 6863255
Filing Date: 2005-03-08
Classification: F16K

Abstract:
1. A solenoid, characterized in that the solenoid comprises: excitation means provided in a solenoid main body and excited through energization; a center post secured in position inside the solenoid main body; a plunger slidably provided in a bearing portion in a plunger chamber defined in the solenoid main body and adapted to be attracted to said center post by a magnetic force through excitation of said excitation means; a fluid accumulating chamber provided substantially coaxially with said plunger chamber and on the opposite side of said center post through the intermediation of the plunger chamber; and a rod which is fixed to the inner periphery of a through-hole formed in said plunger, one end of which protrudes so as to reach the fluid outside the solenoid main body through a through-hole formed in said center post, and the other end of which protrudes so as to reach the interior of said fluid accumulating chamber, and that said rod has a through-hole for guiding the fluid outside said solenoid main body only to the interior of said fluid accumulating chamber, and that a first cutoff portion separating said plunger chamber and the fluid accumulating chamber from each other is provided on and is in contact with the outer peripheral side of said rod.