IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0860252
(2004-06-03)
|
등록번호 |
US-7287545
(2007-10-30)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
16 인용 특허 :
14 |
초록
▼
A check valve adapted for mounting between any flanges and specifically between sanitary flanges in a piping system, the check valve comprising a stationary portion and a flexible portion; the single-piece rigid stationary portion including and supporting a valve seat; the single-piece molded elasto
A check valve adapted for mounting between any flanges and specifically between sanitary flanges in a piping system, the check valve comprising a stationary portion and a flexible portion; the single-piece rigid stationary portion including and supporting a valve seat; the single-piece molded elastomeric flexible portion including a flange gasket, a valve plug, flexible retaining arms for guiding and securing the valve plug movement with respect to the valve seat, and a visual means to indicate that the check valve is installed, permits flow in the desired direction, and is drainable; the check valve being fully cleanable and sterilizable in situ by flow-through methods and having at least one embodiment that is fully drainable when mounted in any orientation.
대표청구항
▼
The invention claimed is: 1. A check valve device for mounting in process piping systems which allows fluid flow in an upstream-to-downstream direction and prevents fluid flow in the opposite downstream-to-upstream direction, the valve device comprising: a rigid plate including an outer circumferen
The invention claimed is: 1. A check valve device for mounting in process piping systems which allows fluid flow in an upstream-to-downstream direction and prevents fluid flow in the opposite downstream-to-upstream direction, the valve device comprising: a rigid plate including an outer circumferential edge, an upstream face, a downstream face, and a port through said plate extended between said faces; and a body including a gasket, a plug, and a retaining means flexibly interconnecting between said gasket and said plug, said gasket being adapted to seal between a pair of mating pipe flanges consisting of an upstream flange and a downstream flange, said plug being adapted to seal said port when retained against said downstream face of said rigid plate, said retaining means guiding the movement of said plug outwardly from and inwardly towards said downstream face of said rigid plate, said retaining means further being adapted to retain said plug against said downstream face of said rigid plate to seal said port, said retaining means creating a plurality of flow paths through which fluid passes around said plug when said plug is pushed away from said downstream face by fluid flowing in the upstream-to-downstream direction; wherein an edge of at least one said flow path is coincident with and immediately adjacent to the inside wall of the piping system; wherein said port is of ovalized shape having a minor axis smaller than, and a major axis equal to, the inside diameter of the pipe into which said valve device is installed; and wherein said check valve device is drainable when mounted so that the lowest point of said port is located where a vertex of said major axis coincides with the inside wall of the piping system and the fluid flow direction through said check valve device is substantially horizontal, substantially vertical, whether substantially upward or substantially downward, or at any angle between substantially horizontal and substantially vertical including partially upward or partially downward. 2. The check valve device of claim 1, wherein each said flexible arm includes an embedded spring means. 3. The check valve device of claim 1, wherein said plug includes an embedded core. 4. The check valve device of claim 1, wherein said downstream face of said rigid plate is beveled around the perimeter of said port to create a valve seat, and said plug is adapted to mate with said valve seat. 5. The check valve device of claim 1, wherein said rigid plate is substantially planar; and wherein said downstream face of said rigid plate is tapered from said edge to said port and said upstream face of said rigid plate is tapered from said edge to said port, so that said rigid plate is thinner at said port and thicker at said outer edge. 6. The check valve device of claim 1, said retaining means comprising an even quantity of said flexible arms symmetrically positioned about the major axis of said plug to form at least one said flow path interposed between two adjacent flexible arms and aligned with the major axis of said plug, and further having at least one orientation tab extending outwardly between the mating pipe flanges and further extending in the downstream direction, wherein each said orientation tab is connected to said gasket adjacent to said at least one flow path aligned with the major axis of said plug to provide visual indication that said check valve device is mounted with the lowest point of said port disposed so that said check valve device is drainable in any fluid flow direction. 7. The check valve device of claim 6, wherein the quantity of said flexible arms is four. 8. The check valve device of claim 1, wherein said gasket includes a groove for receiving said outer circumferential edge of said rigid plate, whereby said gasket groove contacts a portion of said upstream face and a portion of said downstream face when said outer edge of said rigid plate is received into said groove. 9. The check valve device of claim 8, wherein said upstream flange and said downstream flange are sanitary pipe flanges. 10. The check valve device of claim 8, wherein said upstream flange and said downstream flange are flat faced flanges. 11. The check valve device of claim 1, wherein said rigid plate is integral to said upstream flange. 12. A check valve device for mounting in process piping systems which allows fluid flow in an upstream-to-downstream direction and prevents fluid flow in the opposite downstream-to-upstream direction, the valve device comprising: a rigid plate including an outer circumferential edge, an upstream face, a downstream face, and a port through said plate extending between said faces, the rigid plate being substantially planar, the downstream face being tapered from said edge to said port and said upstream face being tapered from said edge to said port, so that said rigid plate is thinner at said port and thicker at said outer edge, the downstream face of said rigid plate being beveled around the perimeter of said port to create a valve seat; a plug adapted to mate with said valve seat to seal said port when retained against said downstream face of said rigid plate; and a retaining means flexibly interconnecting between a gasket and said plug for guiding the movement of said plug outwardly from and inwardly towards said downstream face of said rigid plate, said retaining means further being adapted to retain said plug against said downstream face of said rigid plate to seal said port; wherein said port is of ovalized shape having a minor axis smaller than, and a major axis equal to, the inside diameter of the pipe into which said valve device is installed; wherein said check valve device is drainable when mounted so that the fluid flow direction therethrough is substantially horizontal, substantially vertical, or at any angle between substantially horizontal and substantially vertical including partially upward or partially downward; wherein said retaining means comprises an even quantity of flexible arms symmetrically positioned about the major axis of said plug creating an equal number of flow paths interposed between said arms through which fluid passes around said plug when said plug is pushed away from said downstream face by fluid flowing in the upstreat-to-downstream direction, at least one said flow path being aligned with the major axis of said plug, said at least one flow path having an edge coincident with and immediately adjacent to the inside wall of the piping system; and wherein said gasket includes a groove for receiving said outer circumferential edge of said rigid plate, whereby said gasket groove contacts a portion of said upstream face and a portion of said downstream face when said outer edge of said rigid plate is received into said groove; said gasket being adapted to seal between a pair of mating pipe flanges, said gasket comprising at least one orientation tab extending outwardly between the mating pipe flanges and further extending in the downstream direction, each said orientation tab being disposed adjacent to said at least one flow path aligned with the major axis of said plug, to provide visual indication that said check valve device is mounted to be drainable in any fluid flow direction. 13. The check valve device of claim 12, wherein said mating pipe flanges are sanitary pipe flanges. 14. The check valve device of claim 12, wherein said mating pipe flanges are flat faced flanges. 15. A check valve device for mounting between a pair of sanitary pipe flanges in process piping systems which allows fluid flow in an upstream-to-downstream direction and prevents fluid flow in the opposite downstream-to-upstream direction, the valve device comprising: a rigid plate including an outer circumferential edge, an upstream face, a downstream face, and a port through said plate extending between said faces, the rigid plate being substantially planar, the downstream face being tapered from said edge to said port and said upstream face being tapered from said edge to said port, so that said rigid plate is thinner at said port and thicker at said outer edge, the downstream face of said rigid plate being beveled around the perimeter of said port to create a valve seat; a plug adapted to mate with said valve seat to seal said port when retained against said downstream face of said rigid plate; and a retaining means flexibly interconnecting between a gasket and said plug for guiding the movement of said plug outwardly from and inwardly towards said downstream face of said rigid plate, said retaining means further being adapted to retain said plug against said downstream face of said rigid plate to seal said port; wherein said port is of ovalized shape having a minor axis smaller than, and a major axis equal to, the inside diameter of the pipe into which said valve device is installed; wherein said check valve device is drainable when mounted so that the lowest point of said port is located where a vertex of said major axis coincides with the inside wall of the piping system and the fluid flow direction through said check valve device is substantially horizontal, substantially vertical, or at any angle between substantially horizontal and substantially vertical including partially upward or partially downward; wherein said retaining means comprises an even quantity of flexible arms symmetrically positioned about the major axis of said plug creating an equal number of flow paths interposed between said arms through which fluid passes around said plug when said plug is pushed away from said downstream face by fluid flowing in the upstream-to-downstream direction, at least one said flow path being aligned with the major axis of said plug, said at least one flow path having an edge coincident with and immediately adjacent to the inside wall of the piping system; and wherein said gasket is adapted to seal between a pair of sanitary pipe flanges, said gasket comprising at least one orientation tab extending outwardly between the pipe flanges and further extending in the downstream direction, each said orientation tab being disposed adjacent to said at least one flow path aligned with the major axis of said plug, to provide visual indication that said check valve device is mounted with the lowest point of said port disposed so that said check valve device is drainable in any fluid flow direction. 16. The check valve device of claim 15, wherein said gasket includes a groove for receiving said outer circumferential edge of said rigid plate, whereby said gasket groove contacts a portion of said upstream face and a portion of said downstream face when said outer edge of said rigid plate is received into said groove. 17. The check valve device of claim 15, wherein said rigid plate is comprised on said upstream flange.
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