초록 ▼

In one embodiment, a check valve includes an outer region and a central region. One or more cuts wind from the outer region towards the central region. In the presence of flow along one direction, the check valve opens by extending the central region away from the outer region. In the presence of fl

In one embodiment, a check valve includes an outer region and a central region. One or more cuts wind from the outer region towards the central region. In the presence of flow along one direction, the check valve opens by extending the central region away from the outer region. In the presence of flow in the reverse direction, the check valve closes by retracting the central region towards the outer region.

대표청구항 ▼

1. A check valve comprising:an outer region;a central region;a cut winding from the outer region towards the central region; and wherein the check valve opens by extending the central region away from the outer region in the presence of flow along one direction and closes by retracting the central r

1. A check valve comprising:an outer region;a central region;a cut winding from the outer region towards the central region; and wherein the check valve opens by extending the central region away from the outer region in the presence of flow along one direction and closes by retracting the central region towards the outer region in the presence of flow in the reverse direction; and wherein the cut includes a bevel on an edge of the cut so that the bevel would interfere with another bevel of another cut of the check valve in order to prevent the central region from extending past the outer region in the direction of the flow in the reverse direction. 2. The check valve of claim 1 wherein the check valve opens by moving the central region towards a fan. 3. The check valve of claim 1 wherein the check valve is on an intake side of a blower. 4. The check valve of claim 1 wherein the check valve is on a blower. 5. The check valve of claim 1 wherein the central region further includes a hole sliding on a shaft. 6. The check valve of claim 5 wherein the shaft is fixedly attached to a grate. 7. The check valve of claim 5 wherein the shaft includes a hard stop for arresting movement of the central region. 8. The check valve of claim 1 wherein the check valve has a circular shape. 9. The check valve of claim 1, wherein the cut winding forms a plurality of gaps between the cut winding when the central region is extended away from the outer region, and wherein the central region is extended in the direction of the flow along the one direction. 10. The check valve of claim 1, wherein the cut winding closes a plurality of gaps between the cut winding when the central region is retracted towards the outer region, and wherein the central region is retracted in the direction of the flow in the reverse direction. 11. The check valve of claim 1, wherein the cut comprises an interfering laminated material. 12. The check valve of claim 1, wherein the central region may twist a few degrees as the central region extends away from the outer region. 13. The check valve of claim 1, wherein the bevel and the another bevel would interfere and seat against each other when the check valve closes by retracting the central region towards the outer region in the presence of flow in the reverse direction. 14. A method of preventing reverse air flow through a fan, the method comprising:expanding a check valve towards a center of a working blower to allow airflow through the check valve; andwhen the fan fails, collapsing the check valve to limit airflow through the check valve; wherein the check valve includes a cut with a bevel on an edge of the cut. 15. The method of claim 14 wherein the check valve includes one or more cuts winding from an outer region towards a central region. 16. The method of claim 14 wherein expanding the check valve includes sliding a central portion of the check valve. 17. The method of claim 14 wherein closing the check valve includes retracting a central portion of the check valve. 18. A check valve comprising:means for expanding a check valve towards the center of a blower to allow airflow in one direction; andmeans for collapsing the check valve to limit airflow in the reverse direction; wherein the check valve includes a cut with a bevel on an edge of the cut. 19. The check value of claim 18 further comprising:means for controlling expansion of the check valve. 20. A cooling mechanism comprising:a plurality of cooling components, each cooling component in the plurality of cooling components having a check valve that includes a cut winding from an outer region towards a central region; andwherein the check valve in each cooling component opens by extending the central region away from the outer region in the presence of flow along one direction and closes by retracting the central region towards the outer region in the presence of flow in the reverse direction; and wherein the cut includes a bevel on an edge of the cut so that the bevel would interfere with another bevel of another cut of the check valve in order to prevent the central region from extending past the outer region in the direction of the flow in the reverse direction. 21. The cooling mechanism of claim 20 wherein the plurality of cooling components includes a blower. 22. The cooling mechanism of claim 20 wherein the plurality of cooling components includes an axial fan. 23. A method of preventing reverse air flow, the method comprising:opening a check valve by extending a central region of the check valve away from an outer region of the check valve, in the presence of flow along one direction; andclosing the check valve by retracting the central region towards the outer region in the presence of flow in a reverse direction; and wherein the check valve includes a cut with a bevel on an edge of the cut. 24. The method of claim 23 wherein the check valve opens by moving the central region towards a fan. 25. The method of claim 23 wherein the check valve is on an intake side of a blower. 26. The method of claim 23 wherein the check valve is on a blower. 27. The method of claim 23 wherein the central region further includes a hole sliding on a shaft. 28. The method of claim 27 wherein the shaft is fixedly attached to a grate. 29. The method of claim 27 wherein the shaft includes a hard stop for arresting movement of the central region. 30. The method of claim 27 wherein the check valve has a circular shape. 31. The method of claim 23, wherein the cut winding forms a plurality of gaps between the cut winding when the central region is extended away from the outer region, and wherein the central region is extended in the direction of the flow along the one direction. 32. The method of claim 23, wherein the cut winding closes a plurality of gaps between the cut winding when the central region is retracted towards the outer region, and wherein the central region is retracted in the direction of the flow in the reverse direction. 33. A check valve comprising:an outer region;a central region;a cut winding from the outer region towards the central region; and wherein the check valve opens by extending the central region away from the outer region in the presence of flow along one direction and closes by retracting the central region towards the outer region in the presence of flow in the reverse direction; and wherein the cut comprises a first layer and a second layer, and wherein a portion of the first layer on one side of the cut is configured to interfere with a portion of the second layer on the other side of the cut, in order to prevent the central region from extending past the outer region in the direction of the flow in the reverse direction. 34. The check valve of claim 33 wherein the check valve opens by moving the central region towards a fan. 35. The check valve of claim 33 wherein the check valve is on an intake side of a blower. 36. The check valve of claim 33 wherein the check valve is on a blower. 37. The check valve of claim 33 wherein the central region further includes a hole sliding on a shaft. 38. The check valve of claim 37 wherein the shaft is fixedly attached to a grate. 39. The check valve of claim 37 wherein the shaft includes a hard stop for arresting movement of the central region. 40. The check valve of claim 33 wherein the check valve has a circular shape.