Oblong diaphragm valves
View Patent ↗An oblong diaphragm valve has curved surfaces carved into faces of a body and a plate. The curved surfaces have an oblong shape and define an oval or egg-shaped valve chamber when the body and the plate are joined and secured to each other, with a diaphragm sandwiched there-between. An inlet and an outlet are defined in the curved surface of the body at opposite ends defined by a length of the valve chamber. A flow passage is defined in the curved surface of the plate and has an opening centrally located relative to the valve chamber for actuation of the diaphragm to close or open the oblong diaphragm valve with minimal or no stress, ensuring durability and longevity of the oblong diaphragm valve with increased precision, while reducing fluid waste and pressure spikes in pumping operations.
1. An oblong diaphragm valve, comprising:
a valve body having a first half and a second half, the first half of the valve body having a first depression defined in a face of a dispense block, the second half of the valve body having a second depression defined in a face of a valve plate, the first depression and the second depression having a same or substantially same depth and having a same or substantially same oblong shape, the oblong shape having a length and a width, the length greater than the width;
a valve chamber having a volume defined by the first depression and the second depression in the first half and the second half of the valve body, the valve chamber having a first end and a second end defined by the length of the oblong shape;
an inlet defined in the first half of the valve body and proximal to the first end of the valve chamber for directing a fluid into the valve chamber;
an outlet defined in the first half of the valve body and proximal to the second end of the valve chamber for directing the fluid out of the valve chamber;
a diaphragm sandwiched between the first half and the second half of the valve body;
a flow passage defined in the second half of the valve body and having an opening centrally located relative to the valve chamber for actuation of the diaphragm to close or open the oblong diaphragm valve a distorted, oblong shaped O-ring;
a first sealing channel or grove defined in the first half of the body, the first sealing channel or grove having an oblong, elongated, elliptical, or non-circular shape surrounding the first depression in the first of the valve body;
a second sealing channel or groove defined in the second half of the valve body, the second sealing channel or groove having an oblong, elongated, elliptical, or non-circular shape surrounding the second depression in the second half of the valve body.
2. The oblong diaphragm valve of claim 1 , wherein the first sealing channel or groove is dimensioned to receive the distorted, oblong shaped O-ring therein and wherein when the first half and the second half of the valve body are joined and secured to each other, the distorted, oblong shaped O-ring presses the diaphragm into the second sealing channel or groove defined in the second half of the valve body such that a seal is created and the diaphragm is fixed in place.
3. The oblong diaphragm valve of claim 1 , wherein the second sealing channel or groove is dimensioned to receive the distorted, oblong shaped O-ring therein and wherein when the first half and the second half of the valve body are joined and secured to each other, the distorted, oblong shaped O-ring presses the diaphragm into the first sealing channel or groove defined in the first half of the valve body such that a seal is created and the diaphragm is fixed in place.
4. The oblong diaphragm valve of claim 1 , wherein the depth is dependent upon at least one of:
an amount of vacuum or pressure required to fully displace the diaphragm in the valve chamber;
an extent of expected stress on the diaphragm during operation of the oblong diaphragm valve;
a temperature or range of temperatures having an effect on the diaphragm;
a dispense volume;
an expected failure rate for the diaphragm;
an expected lifespan of the diaphragm;
a diameter of the inlet;
a diameter of the outlet; or
a viscosity of the fluid.
5. The oblong diaphragm valve of claim 1 , wherein the first depression defines a seat having a concaved surface against which the diaphragm adapts to match with minimal or no stress when pressure is applied via the flow passage and the opening defined in the second half of the valve body to close the oblong diaphragm valve.
6. The oblong diaphragm valve of claim 1 , wherein the second depression defines a seat having a concaved surface against which the diaphragm adapts to match with minimal or no stress when vacuum is applied via the flow passage and the opening defined in the second half of the valve body to open the oblong diaphragm valve and allow the fluid to flow from the inlet to the outlet.
7. The oblong diaphragm valve of claim 1 , wherein the valve chamber has a cross-sectional profile of a non-circular shape with no corners or diverging lines.
8. The oblong diaphragm valve of claim 1 , wherein the dispense block, the valve plate, and the oblong diaphragm valve there-between are in a pump.
9. A system, comprising:
a body having a first end face;
a plate having a second end face; and
an oblong diaphragm valve having:
a first part and a second part, the first part of the oblong diaphragm valve having a first curved surface carved into the first end face of the body, the second part of the oblong diaphragm valve having a second curved surface carved into the second end face of the plate, the first curved surface and the second curved surface having a same or substantially depth and having a same or substantially same oblong shape, the oblong shape having a length and a width, the length greater than the width;
a valve chamber having a volume defined by the first curved surface and the second curved surface in the first part and the second part of the oblong diaphragm valve, the valve chamber having a first end and a second end defined by the length of the oblong shape;
an inlet defined in the first part of the oblong diaphragm valve and proximal to the first end of the valve chamber for directing a fluid into the valve chamber;
an outlet defined in the first half of the oblong diaphragm valve and proximal to the second end of the valve chamber for directing the fluid out of the valve chamber;
a diaphragm sandwiched between the first part and the second part of the oblong diaphragm valve;
a flow passage defined in the second part of the oblong diaphragm valve and having an opening centrally located relative to the valve chamber for actuation of the diaphragm to close or open the oblong diaphragm valve a distorted, oblong shaped O-ring;
a first sealing channel or groove defined in the first part of the oblong diaphragm valve, the first sealing channel or groove having an oblong, elongated, elliptical, or non-circular shape surrounding the first curved surface in the first part of the oblong diaphragm valve; and
a second sealing channel or groove defined in the second part of the oblong diaphragm valve, the second sealing channel or groove having an oblong, elongated, elliptical, or non-circular shape surrounding the second curved surface in the second part of the oblong diaphragm valve.
10. The system of claim 9 , wherein the first sealing channel or groove is dimensioned to receive the distorted, oblong shaped O-ring therein and wherein when the first part and the second part of the oblong diaphragm valve are joined and secured to each other, the distorted, oblong shaped O-ring presses the diaphragm into the second sealing channel or groove defined in the second part of the oblong diaphragm valve such that a seal is created and the diaphragm is fixed in place.
11. The system of claim 9 , wherein the second sealing channel or groove is dimensioned to receive the distorted, oblong shaped O-ring therein and wherein when the first part and the second part of the oblong diaphragm valve are joined and secured to each other, the distorted, oblong shaped O-ring presses the diaphragm into the first sealing channel or groove defined in the first part of the oblong diaphragm valve such that a seal is created and the diaphragm is fixed in place.
12. The system of claim 9 , wherein the depth is dependent upon at least one of:
an amount of vacuum or pressure required to fully displace the diaphragm in the valve chamber;
an extent of expected stress on the diaphragm during operation of the oblong diaphragm valve;
a temperature or range of temperatures having an effect on the diaphragm;
a dispense volume;
an expected failure rate for the diaphragm;
an expected lifespan of the diaphragm;
a diameter of the inlet;
a diameter of the outlet; or
a viscosity of the fluid.
13. The system of claim 9 , wherein the first curved surface defines a seat against which the diaphragm adapts to match with minimal or no stress when pressure is applied via the flow passage and the opening defined in the second part of the oblong diaphragm valve to close the oblong diaphragm valve.
14. The system of claim 9 , wherein the second curved surface defines a seat against which the diaphragm adapts to match with minimal or no stress when vacuum is applied via the flow passage and the opening defined in the second part of the oblong diaphragm valve to open the oblong diaphragm valve and allow the fluid to flow from the inlet to the outlet.
15. The system of claim 9 , wherein the valve chamber has a cross-sectional profile of a non-circular shape with no corners or diverging lines.
16. The system of claim 9 , wherein the body is part of a dispense block in a pump, wherein the plate comprises a valve plate, and wherein the second end face of the valve plate is structured to couple to the first end face of the dispense block such that the diaphragm is sandwiched between the first part and the second part of the oblong diaphragm valve.