Valves and valve actuation – Electrically actuated valve – Having element dimensionally responsive to field
Patent
1995-06-01
1998-06-30
Nguyen, Hoang
Valves and valve actuation
Electrically actuated valve
Having element dimensionally responsive to field
25112917, 251234, 251285, F16K 3102
Patent
active
057721815
ABSTRACT:
An adjustable pivot valve assembly (10) for use in a fluid flow system (S). A valve body (12) has a fluid flow path therethrough and includes an inlet (14), an outlet (16), and a valve orifice (18) formed intermediate the inlet and outlet. A valve seat (28) is mounted for movement relative to the orifice to open and close the fluid path. The valve seat is attached to a valve stem (30). A solenoid assembly (50) is supplied an input from a sensor/control unit (S) to effect movement of the valve seat. What would otherwise be a linear movement of the valve stem and valve seat is translated into movement of a plunger (78) interconnected with the valve stem to produce a movement which is orthogonal to a longitudinal axis of the valve stem. This translated movement causes the valve seat to pivotally move about the orifice to effect an opening of the orifice for fluid to flow between the inlet and outlet. The valve stem, plunger, and a pole piece (56) of the of the solenoid comprise a lever arm the length of which is adjustable to vary the force required to effect the pivoting movement. A spring arrangement (86a, 86b) centers the valve stem and seat, and a spring (46) biases the valve seat toward a position closing the orifice. Stops (90a, 90b) located on opposite sides of the plunger, at the end of the arm remote from the valve seat, limit the orthogonal movement of the valve stem.
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Emerson Electric Co.
Nguyen Hoang
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