Valves and valve actuation – Electrically actuated valve – Balanced valve
Patent
1996-06-12
1998-07-14
Rivell, John
Valves and valve actuation
Electrically actuated valve
Balanced valve
251282, F16K 3106, F16K 3902
Patent
active
057792194
ABSTRACT:
The invention particularly relates to a solenoid valve used in a control fluid, and one end of a center pole on the side opposite from a plunger is covered with theend face of a housing, and a communication passage is formed in the housing to communicate a through hole of the center pole with an opening formed on the housing on the side of the plunger. The communication passage has an end face groove and at least one side face groove on the end face and the side face of the housing. A volume of the side face groove is larger than a variation in volume of a space between the plunger and the center pole due to the movement of the plunger, and it is 2.5 times or more of the variation in volume of the space between the plunger and the center pole due to the movement of the plunger. Thus, the control fluid of the plunger on the opposite side from the center pole is reduced to enter along the outer periphery of the plunger into the space between the plunger and the center pole, and impurities can be easily and reliably prevented from being accumulated between the center pole and the plunger.
REFERENCES:
patent: 3472483 (1969-10-01), Janczur
patent: 4634096 (1987-01-01), Hara
patent: 4989829 (1991-02-01), Bickel
Hayashi Motoaki
Miida Hiroshi
Ohya Yoshihito
Okamoto Hisanori
Uematsu Masashige
Honda Giken Kogyo Kabushiki Kaisha
Kabushiki Kaisha Riken
Rivell John
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