US 2003/0075702 A1 · Electromagnetic valve apparatus

Abstract

An electromagnetic valve apparatus prevents fluid leakage and contains a stationary core having a shape of a bottomed, single-piece cup constructed by combining a housing portion, an attracting portion, a thin-walled portion that joins the housing portion and the attracting portion, and a flange portion. The housing portion has a closed bottom portion, and the attracting portion is adjacent an open end of the stationary core. The housing portion reciprocally supports a movable core. The thin-walled portion is a magnetic resistance portion for preventing leakage of magnetic flux. A magnetic cylindrical attracting member is press-inserted in the inner wall of the attracting portion located on the opened side of the stationary core. The attracting member is arranged face to face with the movable core in the reciprocating path of the movable core. Upon energizing a coil, a magnetic attractive force attracts the movable core to the attracting member.

Claims10

Dependent claims

An electromagnetic valve apparatus comprising:

a movable core;
a single-piece stationary core having a first end as a closed end and a second end defining an opening, wherein the stationary core accommodates and reciprocally supports the movable core;
an attracting member attached to an inner wall of the stationary core, wherein the inner wall is located adjacent to the open end of the stationary core, the attracting member being placed face to face with the movable core in a path in which the movable core reciprocates, with a magnetic attractive force being generated between the attracting member and the movable core;
a coil disposed around an outer periphery of the stationary core, the coil generating a magnetic attractive force between the attracting member and the movable core;
and
a valve member disposed adjacent to the attracting member of the movable core, wherein the valve member reciprocates with the movable core to control a flow rate in a flow passage.

3 more elements

Dependencies are inferred from the claim text.

Electromagnetic valve apparatus

Life of this patent

Electromagnetic valve apparatus

Life of this patent

Abstract

Claims10