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US 6,883,544 B2Granted
Solenoid valve with improved magnetic attractive force
AssigneeDenso Corporation
InventorsFutoshi Kawamura, Masahiko Ochiai
Life of this patent
Estimating the term…
Abstract
In a solenoid valve, a boss portion is formed integrally with an attracting portion of a stator core at an outer peripheral side of the attracting portion. The boss portion has a tapered outer peripheral surface and a tapered inner peripheral surface. A plunger has a communication passage, which extends through the plunger generally along a central axis of the plunger.
Claims12
A solenoid valve comprising:
- a slider, which is axially reciprocable and includes a communication passage that extends through the slider generally along a central axis of the slider, wherein the communication passage is communicated with at least one first side space located on first axial side of the slider and is also communicated with at least one second side space located on second axial side of the slider;
- a spring, which provides urging force for urging the slider in a first axial direction of the solenoid valve;
- a coil, which generates magnetomotive force for attracting the slider in a second axial direction opposite to the first axial direction;
- a first stator segment, which includes an attracting portion, wherein the attracting portion is axially opposed to the slider and attracts the slider in the second axial direction upon generation of the magnetomotive force by the coil;
- a second stator segment, which forms a magnetic circuit in cooperation with the slider and the first stator segment and includes a tubular portion, wherein the tubular portion is at least partially placed radially outward of the slider;
- a non-magnetic body, which is at least partially placed radially inward of the tubular portion of the second stator segment to slidably support the slider therein;
- and
- a valve member, said valve member having an extending portion which directly contacts the slider without abutting any intervening structure.
5 more elements
A solenoid valve comprising:
- a slider, which is axially reciprocable and includes a communication passage that extends through the slider generally along a central axis of the slider, wherein the communication passage is communicated with at least one first side space located on first axial side of the slider and is also communicated with at least one second side space located on second axial side of the slider;
- a spring, which provides urging force for urging the slider in a first axial direction of the solenoid valve;
- a coil, which generates magnetomotive force for attracting the slider in a second axial direction opposite to the first axial direction;
- a first stator segment, which includes an attracting portion, wherein the attracting portion is axially opposed to the slider and attracts the slider in the second axial direction upon generation of the magnetomotive force by the coil;
- a second stator segment, which forms a magnetic circuit in cooperation with the slider and the first stator segment and includes a tubular portion, wherein the tubular portion is at least partially placed radially outward of the slider;
- and
- a non-magnetic body, which is at least partially placed radially inward of the tubular portion of the second stator segment to slidably support the slider therein,
- wherein the first stator segment includes a boss portion, which axially protrudes from an outer peripheral side of the attracting portion toward the slider, wherein the boss portion includes a tapered outer peripheral surface and a tapered inner peripheral surface.
5 more elements
Dependencies are inferred from the claim text.