Fluid flow regulator with restrictor pin
AssigneeEmerson Electric Co.
InventorsThomas P. Buescher, Timothy E. Reitz
Life of this patent
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Abstract
A fluid flow regulator having a chamber comprising a port opening and a tapered pin disposed within the opening, for controllably restricting the cross-sectional flow area through the port. The tapered pin moves relative to the bore of the port that it is disposed in, under the influence of a pressure responsive diaphragm. A spring biases the pin towards the diaphragm. The diaphragm's movement is unaffected by any misalignment of the diaphragm with respect to the tapered pin and port, and the tapered pin's movement is unaffected by any diaphragm movement not in line with the port.
Claims8
An adjustable fluid flow regulator having a regulator chamber comprising:
- a first port in communication with a pressure signal;
- a second port, through which the cross-sectional opening is controllably restricted to regulate a control pressure based on the pressure signal;
- a tapered pin disposed within the second port, for controllably restricting the cross-sectional opening area through the second port;
- a diaphragm, which is adjustably moveable relative to changes in pressure, for controllably displacing the tapered pin relative to changes in the pressure signal;
- a spring axially located around the second port opening lip for biasing the tapered pin towards the diaphragm and away from closure against the port;
- wherein the tapered pin is separate and not attached to the diaphragm;
- and
- wherein the control pressure controls a second diaphragm and poppit, which regulate the fluid flow through a valve.
An adjustable fluid flow regulator in combination with a gas valve, the regulator comprising:
- a first port in communication with a pressure signal;
- a second port, through which the cross-sectional opening is controllably restricted to regulate a control pressure based on the pressure signal;
- a tapered pin disposed within the second port, for controllably restricting the cross-sectional opening area through the second port;
- a diaphragm, which is adjustably moveable relative to changes in pressure, for controllably displacing the tapered pin relative to changes in the pressure signal;
- a spring axially located around the second port opening lip for biasing the tapered pin towards the diaphragm and away from closure against the port:
- wherein the tapered pin is separate and not attached to the diaphragm;
- and
- wherein the control pressure controls a second diaphragm and poppit, which regulate the fluid flow through a valve.
Dependencies are inferred from the claim text.