A diaphragm is provided that includes a plurality of zonal portions that define reinforced and non-reinforced areas of the diaphragm. A first zonal portion extends from a marginal edge portion toward a central portion and is formed of a fabric material. A second zonal portion extends from the first
A diaphragm is provided that includes a plurality of zonal portions that define reinforced and non-reinforced areas of the diaphragm. A first zonal portion extends from a marginal edge portion toward a central portion and is formed of a fabric material. A second zonal portion extends from the first zonal portion toward the central portion and is formed of an elastomer. A third zonal portion defines the central portion and is formed of a fabric material. The combination of reinforced and non-reinforced portions provides for a decrease in the radial tension (spring rate) of the diaphragm and helps prevent undesired changes to the flow control valve flow setpoint.
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We claim: 1. A diaphragm comprising: a first portion extending inwardly from a marginal edge portion toward a central portion, the first portion comprising a reinforced material; a second portion coupled to the first portion and extending inwardly from the first portion toward the central portion,
We claim: 1. A diaphragm comprising: a first portion extending inwardly from a marginal edge portion toward a central portion, the first portion comprising a reinforced material; a second portion coupled to the first portion and extending inwardly from the first portion toward the central portion, the second portion comprising a non-reinforced material; and a third portion coupled to the second portion and defining the central portion, the third portion comprising a reinforced material. 2. A diaphragm as claimed in claim 1, wherein the reinforced material is a fabric material having a plurality of yarns in a woven pattern. 3. A diaphragm as claimed in claim 2, wherein the woven pattern comprises at least a first yarn crossed over a second yarn at an angle. 4. A diaphragm as claimed in claim 2, wherein the fabric material comprises at least a first pair of yarns crossed over a second pair of yarns at an angle. 5. A diaphragm as claimed in claim 2, wherein the fabric material has a yarn count of at least 50 yarns per square inch. 6. A diaphragm as claimed in claim 2, wherein the plurality of yarns of the fabric material are formed of at least one of a polyamide (nylon), a fiberglass, or a polyester. 7. A diaphragm as claimed in claim 6, wherein the fabric material is formed of an aromatic polyamide. 8. A diaphragm as claimed in claim 1, wherein the non-reinforced material is an elastomer. 9. A diaphragm as claimed in claim 8, wherein the elastomer is at least one of a silicone, a fluorosilicone, or fluorocarbon 10. A diaphragm as claimed in claim 9, wherein the elastomer is vinyl methyl silicone (VMQ). 11. A diaphragm as claimed in claim 10, wherein the elastomer is a vinyl methyl silicone material and includes an iron oxide powder, Silastic® HT-1, and a high temperature catalyst 2,5dimethyl-2,5-di-(t-butyl peroxy). 12. A diaphragm comprising: a first zonal portion extending inwardly from a marginal edge portion toward a central portion, the first zonal portion comprising a fabric material; a second zonal portion coupled to the first zonal portion and extending inwardly from the first zonal portion toward the central portion, the second zonal portion comprising an elastomer; and a third zonal portion coupled to the second zonal portion and defining the central portion, the third zonal portion comprising a fabric material. 13. A diaphragm as claimed in claim 12, wherein the fabric material includes a plurality of yarns in a woven pattern wherein at least a first yarn crosses over a second yarn at an angle. 14. A diaphragm as claimed in claim 13, wherein the fabric material has a yarn count of at least 50 yarns per square inch. 15. A diaphragm as claimed in claim 13, wherein the plurality of yarns of the fabric material are formed of at least one of a polyamide (nylon), a fiberglass, or a polyester. 16. A diaphragm as claimed in claim 15, wherein the fabric material is formed of an aromatic polyamide. 17. A diaphragm as claimed in claim 12, wherein the elastomer is at least one of a silicone, a fluorosilicone, or a fluorocarbon. 18. A diaphragm as claimed in claim 17, wherein the elastomer is vinyl methyl silicone (VMQ). 19. A reinforced elastomeric diaphragm comprising: a first portion extending inwardly from a marginal edge portion toward a central portion, the first portion defining a reinforced first zone comprising a fabric material including a plurality of yarns in a woven pattern, wherein the plurality of yarns of the fabric material are formed of at least one of a polyamide (nylon), a fiberglass, or a polyester; a second portion coupled to the first portion and extending inwardly from the first portion toward the central portion, the second portion defining a non-reinforced second zone comprising an elastomer of at least one of a silicone, a fluorosilicone, or a fluorocarbon; and a third portion coupled to the second portion and defining the central portion and a reinforced third zone comprising a fabric material including a plurality of yarns in a woven pattern, wherein the plurality of yarns of the fabric material are formed of at least one of a polyamide (nylon), a fiberglass, or a polyester. 20. A diaphragm as claimed in claim 19, wherein the fabric material is formed of an aromatic polyamide and the elastomer is vinyl methyl silicone (VMQ).
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이 특허에 인용된 특허 (13)
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