Solenoid needle valve assembly
AssigneeBrooks Instrument, LLC
InventorsStephen P. Glaudel, Jan Willem Van Rijswijk
Life of this patent
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Abstract
The disclosed embodiments include an apparatus and a method for controlling fluid flow. In accordance with certain of the disclosed embodiments, a valve is disclosed that comprises a yoke that encases a coil. The yoke has a gap adjacent to a central aperture of the yoke. A core tube is placed in the central aperture. The core tube has a core slidingly disposed within an interior chamber for controlling a fluid flow rate from a flow inlet to a flow outlet. A current is provided to the coil. Magnetic flux, generated by the coil in response to the current, is directed through the gap to cause the core to move proportionally based on the amount of current provided to the coil for changing the fluid flow rate from the flow inlet to the flow outlet.
Claims20
A valve comprising:
- a mounting body having a fluid inlet and a fluid outlet;
- a core tube adjacent to the mounting body, the core tube having an interior chamber with a proximal end and a distal end;
- a core slidingly disposed within the core tube interior chamber, the core having a proximal end, a distal end and a center located between the proximal end and the distal end, the core movable between an open position and a closed position relative to the mounting body, wherein the core distal end engages at least one of the mounting body fluid inlet and mounting body fluid outlet to block fluid flow therethrough when the core is in the closed position;
- at least one biasing member operable to bias the core in at least one of the open and closed positions;
- a coil disposed about the core tube, the coil operable to cause the core to move between the open position and the closed position when energized;
- and
- a yoke encasingly disposed about the coil, the yoke having an opening adjacent to the core tube, the opening having a center, wherein a distance between the core center and the yoke opening center decreases when the coil is energized.
A yoke comprising:
- a top yoke hub;
- a bottom yoke hub;
- an inner portion housing a coil;
- an aperture for receiving a core tube, the core tube having a core slidingly disposed within an interior chamber;
- and
- a gap between the top yoke hub and the bottom yoke hub, the gap having a center at a midpoint between a first end of the top yoke hub and a second end of the bottom yoke hub, and wherein magnetic flux generated by the coil when energized is directed through the gap to cause the core to move.
A method of controlling fluid flow, the method comprising:
- encasing a coil in a yoke, the yoke having a gap adjacent to a central aperture of the yoke;
- placing a core tube in the central aperture of the yoke;
- the core tube having a core slidingly disposed within an interior chamber for controlling a fluid flow rate from a flow inlet to a flow outlet;
- providing current to the coil;
- and
- directing magnetic flux, generated by the coil in response to the current, through the gap to cause the core to move for changing the fluid flow rate from the flow inlet to the flow outlet.
Dependencies are inferred from the claim text.