Title:
THREE-WAY SOLENOID VALVE
Document Type and Number:
Japanese Patent JP2703189
Kind Code:
B2
Abstract:
PURPOSE: To prevent the collision between a plunger and a fixed iron core and improve durability, by the contact of a valve body fixed at the lower end of the hollow part of a plunger, with the second valve seat on the NO port side before the collision of the plunger with a fixed iron core.
CONSTITUTION: In the nonelectric conduction state, only the downward urging force by a restoration spring 22 engaged with a flange part 8d acts on a plunger 8. A valve body 9 which is fitted on the plunger 8 makes contact with the first valve seat 7 positioned below, and a communication hole 6 to an NC port 4 is cut off. A fluid which is introduced into a valve body 2 from a COM port 3 flows into a valve chamber 5, and flows in a pipe 19 from the hole 8c of the plunger 8, and reaches an NO port 17. In the electric conduction state, a magnetic field is generated in the vertical direction of a fixed magnetic core 15, and the upper fixed iron core 15 is attracted against the urging force acting on the restoration spring 22 by the plunger 8. Though the plunger 8 stops through the contact with the second valve seat 20 of the valve body 9 fitted in a valve body holding part 8b, the collision of the upper end surface of the plunger 8 with the fixed iron core 15 is prevented.
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Inventors:
Akiyuki Kobayashi
Application Number:
JP27298794A
Publication Date:
January 26, 1998
Filing Date:
October 11, 1994
Export Citation:
Assignee:
CKD Corporation
International Classes:
F16K11/044; F16K31/06; (IPC1-7): F16K11/044; F16K31/06
Domestic Patent References:
| JP5511827B2 | ||||
| JP39579Y2 |
Attorney, Agent or Firm:
Takashi Tomizawa (2 outside)
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