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US 5,038,826 AGranted
Three-way electromagnetic valve
AssigneeNippondenso Co., Ltd.
InventorsKoichi Kabai, Katsuyuki Tamai
Life of this patent
Estimating the term…
Abstract
A three-way electromagnetic valve provided with a valve body, a movable member slidably disposed in the valve body, an actuator for driving the movable member, an opening-closing mechanism provided in an internal passage formed in the movable member. A clearance reducing portion is formed to reduce a gap created by a pressurized fluid entering the slide section or by the force of fastening and fixing the valve body, thereby limiting the leakage of the pressurized fluid.
Claims23
A three-way electromagnetic valve comprising:
- a valve body having a supply port through which a pressurized fluid flows, a control port, a discharge port, a slide bore formed with said ports so as to communicate with the same, and a valve seat formed between said supply port and said discharge port;
- a movable member slidably disposed in said slide bore and capable of contacting and moving away from said valve seat, said movable member having an internal passage formed in its body to enable said supply port and said control port to communicate with each other, said movable member providing communication between said control port and said discharge port when not seated on said valve seat;
- an actuator for driving said movable member;
- opening-closing means disposed in said internal passage of said movable member, operated to open said internal passage when said movable member is seated on said valve seat and operated to close said internal passage when said movable member is not seated on said valve seat;
- and
- reduction means for reducing a gap formed between said slide bore and the outer peripheral surface of said movable member when said movable member is seated on said valve seat.
3 more elements
A three-way electromagnetic valve comprising:
- a valve body having a supply port through which a pressurized fluid flows, a control port, a discharge port, a slide bore formed with said ports so as to communicate with the same, and a valve seat formed between said supply port and said discharge port;
- a movable member slidably disposed in said slide bore and capable of contacting and moving away from said valve seat, said movable member having an internal passage formed in its body to enable said supply port and said control port to communicate with each other, said movable member providing communication between said control port and said discharge port when not seated on said valve seat;
- an actuator for driving said movable member;
- opening-closing means disposed in said internal passage of said movable member, operated to open said internal passage when said movable member is seated on said valve seat and operated to close said internal passage when said movable member is not seated on said valve seat;
- and
- pressure accumulation chamber means for maintaining part of the pressurized fluid for balancing with pressure deformation caused by penetration of the pressurized fluid between said slide bore and the outer peripheral surface of said movable member when said movable member is seated on said valve seat.
3 more elements
Dependencies are inferred from the claim text.