Claims
- 1. A radial diaphragm valve comprising:
a valve body having a valve cavity therein defined by a curved surface therein; a diaphragm having a perimeter that seals said valve cavity; a first fluid passage in said valve body that opens to said valve cavity at a first port and a second fluid passage in said valve body that opens to said valve cavity at a second port; said diaphragm having a valve stem that opens and closes the valve; said valve stem in said closed position sealing against a portion of said curved surface surrounding said first port and substantially radially spaced therefrom.
- 2. The valve of claim 1 wherein said valve stem seals against said surface between said first and second ports and has a diameter greater than the diameter of said first port.
- 3. The valve of claim 1 wherein said curved surface substantially forms a hemispherical valve cavity.
- 4. The valve of claim 1 wherein said valve stem comprises a curved button that seals against said surface, said button having a radius of curvature greater than said cavity radius of curvature.
- 5. The valve of claim 1 wherein said curved surface is spherical with a radius of curvature about equal to said diaphragm radius.
- 6. The valve of claim 5 wherein linear displacement of said valve stem from said closed position to said open position produces a substantial non-linearly increasing flow cross-sectional area.
- 7. The valve of claim 6 wherein said flow cross-sectional area is at least two times a flow cross-sectional area of said first fluid passage.
- 8. The valve of claim 1 wherein said first port opens to said valve cavity along a central flow axis that is angularly offset from said valve stem translation axis.
- 9. The valve of claim 8 wherein said first fluid passage comprises a first portion aligned transverse said valve stem translation axis and a second portion that opens to said valve cavity; said first and second portions forming an included angle therebetween that is less the ninety degrees.
- 10. The valve of claim 9 wherein said second portion comprises a conical bore.
- 11. The valve of claim 10 comprising a chamfered valve seat adjacent said second portion.
- 12. The valve of claim 8 comprising a chamfered valve seat adjacent said first port.
- 13. The valve of claim 12 wherein said first port is elliptical.
- 14. The valve of claim 1 wherein said valve stem moves between a valve open and closed position along an axis, said valve stem comprises a seal surface and a lip portion that extends laterally from said axis and forms a surface opposite said seal surface; said opposite surface when exposed to fluid back pressure from said second fluid passage urging said valve stem to said closed position.
- 15. The valve of claim 14 wherein said first fluid passage is a valve inlet and said second fluid passage is a valve outlet; the valve operating as a check valve.
- 16. The valve of claim 1 wherein said first and second fluid passages are generally co-axially aligned.
- 17. The valve of claim 1 wherein said first and second fluid passages are axially offset with respect to each other.
- 18. The valve of claim 1 wherein said second fluid passage opens tangentially to said valve cavity.
- 19. The valve of claim 1 wherein said second fluid passage opens to said valve cavity along a flow path that is laterally offset from said valve so that fluid flow into said valve cavity from said second fluid passage is along a flow path other than directly at said valve stem.
- 20. A radial diaphragm valve comprising a valve body having a valve cavity with first and second ports therein, said cavity being defined by a hemispherical surface.
- 21. The valve of claim 20 comprising a generally annular diaphragm that seals said valve cavity, said valve cavity having a diameter substantially equal to a diameter of said diaphragm.
- 22. The valve of claim 20 wherein said valve cavity has a depth equal to or less than its radius of curvature.
- 23. The valve of claim 20 comprising a diaphragm that seals one of said ports at a seal surface that is radially spaced from said one port.
- 24. The valve of claim 20 wherein said first port is elliptical.
- 25. The valve of claim 20 wherein said first port is formed by a conical bore.
- 26. The valve of claim 25 comprising a chamfered valve seat adjacent said conical bore.
- 27. The valve of claim 20 comprising a chamfered valve seat adjacent one of said ports.
- 28. A radial diaphragm valve comprising a valve body having a valve cavity formed therein by a spherical surface; and a generally annular diaphragm that seals said cavity, said cavity having a diameter substantially equal to a diameter of said diaphragm.
- 29. A radial diaphragm valve comprising a valve body with a valve cavity therein formed by a curvilinear surface and a generally annular diaphragm that seals said cavity; said cavity having a depth that is about equal to half the diameter of said diaphragm.
- 30. A radial diaphragm valve comprising a valve body with a spherical valve cavity therein and a port that opens to said valve cavity; said port being elliptical; and a chamfered annular valve seat adjacent to said port.
- 31. A radial diaphragm valve comprising a valve cavity having a port therein, and a generally annular diaphragm with a diaphragm stem and a stem tip for sealing said port, said diaphragm stem being radially tapered inward to form a lip at said stem tip; said lip producing a closing force in response to fluid back pressure against said stem.
- 32. A radial diaphragm valve comprising:
a valve body having a valve cavity therein defined by a spherical surface; a diaphragm having a perimeter that seals said valve cavity; a first fluid passage in said valve body that opens to said valve cavity at a first port and a second fluid passage in said valve body that opens to said valve cavity at a second port; said diaphragm having a valve stem that opens and closes the valve; said valve stem in said closed position sealing against a portion of said curved surface surrounding said first port and radially spaced therefrom; wherein said bowl depth is about half the diameter of said diaphragm.
- 33. A radial diaphragm valve comprising:
a valve body having a valve cavity therein defined by a spherical surface; a diaphragm having a perimeter that seals said valve cavity; a first fluid passage in said valve body that opens to said valve cavity at a first port and a second fluid passage in said valve body that opens to said valve cavity at a second port; said diaphragm having a valve stem seal face that opens and closes the valve; said valve stem in said closed position sealing against a portion of said curved surface surrounding said first port and radially spaced therefrom; wherein said seal face is about ⅝ or less than the diameter of said cavity.
- 34. A radial diaphragm valve comprising:
a valve body having a valve cavity therein defined by a spherical surface; a diaphragm having a perimeter that seals said valve cavity; a first fluid passage in said valve body that opens to said valve cavity at a first port and a second fluid passage in said valve body that opens to said valve cavity at a second port; said diaphragm having a valve stem that opens and closes the valve by movement of the valve stem along an axis a predetermined stroke; said valve stem in said closed position sealing against a portion of said curved surface surrounding said first port and radially spaced therefrom; wherein said stroke is about half or less the radius of said diaphragm.
- 35. A valve body having a valve cavity formed therein by a spherical surface; and a generally annular diaphragm valve body seal surface, said cavity having a diameter substantially equal to a diameter of said diaphragm valve body seal surface.
- 36. A valve body with a valve cavity therein formed by a spherical surface and a generally annular diaphragm valve body seal surface; said cavity having a depth that is about equal to half the diameter of said diaphragm valve body seal surface.
- 37. A valve body with a spherical valve cavity therein and a port that opens to said valve cavity; said port being elliptical; and a chamfered annular valve seat adjacent to said port.
- 38. A valve body having a valve cavity with first and second ports therein, said cavity being defined by a substantially hemispherical surface.
RELATED APPLICATIONS
[0001] This application is a continuation in part of U.S. patent application Ser. No. 09/231,683 filed on Jan. 14, 1999 for SANITARY DIAPHRAGM VALVE which claims the benefit of U.S. provisional patent application serial No. 60/103,722 filed on Oct. 8, 1998 for SANITARY DIAPHRAGM VALVE (docket no. 22188/05604), the entire disclosures of which are fully incorporated herein by reference. This application also claims the benefit of U.S. provisional patent application serial No. 60/192,785 filed on Mar. 28, 2000 for SANITARY DIAPHRAGM VALVE, the entire disclosure of which is fully incorporated herein by reference.
Provisional Applications (2)
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Number |
Date |
Country |
|
60103722 |
Oct 1998 |
US |
|
60192785 |
Mar 2000 |
US |
Continuations (1)
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Number |
Date |
Country |
Parent |
09568425 |
May 2000 |
US |
Child |
10109413 |
Mar 2002 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09231683 |
Jan 1999 |
US |
Child |
09568425 |
May 2000 |
US |