IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0299137
(2005-12-07)
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등록번호 |
US-7357867
(2008-04-15)
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발명자
/ 주소 |
- Knight,Steven R.
- Church,John F.
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
4 인용 특허 :
23 |
초록
▼
A filter element removably located in a housing having a central valve structure. The element has an end cap with a valve actuating portion. The valve actuating portion includes a cylindrical portion and an annular base projecting radially inward from the cylindrical portion. The valve actuating por
A filter element removably located in a housing having a central valve structure. The element has an end cap with a valve actuating portion. The valve actuating portion includes a cylindrical portion and an annular base projecting radially inward from the cylindrical portion. The valve actuating portion includes a plurality of thin, flat keys spaced around the annular base and projecting radially inward from the cylindrical portion and axially outward from the base. The keys engage the valve structure in the housing when the element is installed, and open up a flow passage through the housing.
대표청구항
▼
What is claimed is: 1. A filter element having a ring of filter media defining a central cavity and circumscribing a central axis, said ring of filter media having a first end and a second end; first and second end caps fixed to said first and second ends, respectively, of said filter media, the se
What is claimed is: 1. A filter element having a ring of filter media defining a central cavity and circumscribing a central axis, said ring of filter media having a first end and a second end; first and second end caps fixed to said first and second ends, respectively, of said filter media, the second end cap having an annular end cap portion sealingly bonded to the second end of said filter media, wherein the second end cap has a valve-actuating portion, including an axially-extending cylindrical portion connected to the annular end cap portion and circumscribing the inner diameter of said annular end cap portion and an annular base connected to the cylindrical portion and extending radially inward from said cylindrical portion to define a first central opening, the base having a surface facing inwardly toward the first end, and a plurality of keys supported by and extending away from said valve-actuating portion in an axially inward direction from said base toward said first end cap, each of said keys having a free engaging portion positioned radially inward to an inner surface of said cylindrical portion and axially spaced away from said annular base, and terminating at a distal end closer to said second end cap than said first end cap. 2. The filter element as in claim 1, wherein each of said keys includes a step including a first edge portion terminating axially a first distance from said annular base and radially inward a first distance from said cylindrical portion, and a second edge portion terminating axially a second distance from said annular base and radially inward a second distance from said cylindrical portion. 3. The filter element as in claim 1, wherein said keys are each thin and flat strips connected to the valve actuating portion. 4. The filter element as in claim 1, wherein each of said keys is connected directly to both the cylindrical portion and said annular base, and the keys extend radially inward from said cylindrical portion to terminate radially outward from the first central opening, and extend axially away from said annular base. 5. The filter element as in claim 1, wherein said annular end cap portion, cylindrical portion, base and said keys are unitary, in one piece. 6. The filter element as in claim 1, further including a key device for defining said keys, said key device being supported against said annular base as a separate component from the cylindrical portion, and is sealingly attached thereto. 7. A filter element comprising: a ring of filter media defining a central cavity and circumscribing a central axis, said ring of filter media having a first end and a second end; first and second end caps fixed to said first and second ends, respectively, of said filter media, the second end cap having an annular end cap portion sealingly bonded to the second end of said filter media and a valve-actuating portion, the valve-actuating portion including: i) a cylindrical portion connected at one end to and circumscribing the inner diameter of said annular end cap portion and extending inward into the central cavity from the second end cap toward the first end cap and terminating prior to the first end cap; ii) an annular base connected to the cylindrical portion and extending radially inward from said cylindrical portion to define a first central opening which can receive a pipe, the base having a surface facing inwardly toward the first end; and iii) a plurality of discrete keys supported at one end by the surface of the base and projecting axially outward from the surface of said annular base toward the said first end cap and terminating prior to the first end cap at a free end closer to the second end cap than the first end cap, the keys having a free engaging end radially inward of an inner surface of said cylindrical portion and axially spaced outwardly from said annular base. 8. The filter element as in claim 7, wherein said first central opening is internal to the central cavity. 9. The filter element as in claim 8, wherein said free engaging end of each key is an edge. 10. The filter element as in claim 7, wherein the free engaging end of the keys face the first end cap. 11. The filter element as in claim 7, wherein the free engaging ends of the keys are internal to the central cavity and face toward the first end cap. 12. The filter element as in claim 7, wherein the keys are fixed to the annular base. 13. The filter element as in claim 12, wherein the keys are unitary with the base. 14. The filter element as in claim 7, wherein the keys have a width projecting radially inward from the cylindrical portion to an inner edge in bounding relation to the first central opening. 15. The filter element as in claim 7, wherein the keys are fixed to the cylindrical portion. 16. The filter element as in claim 7, wherein the cylindrical portion is unitary with the annular end cap portion. 17. The filter element as in claim 7, wherein said keys are axially elongated. 18. A filter element comprising: a ring of filter media defining a central cavity and circumscribing a central axis, said ring of filter media having a first end and a second end; first and second end caps fixed to said first and second ends, respectively, of said filter media, the second end cap having an annular end cap portion sealingly bonded to the second end of said filter media and a valve-actuating portion including i) a cylindrical portion connected at one end to and circumscribing the inner diameter of said annular end cap portion and extending inward into the central cavity from the second end cap toward the first end cap and terminating prior to the first end cap, ii) an annular base connected to the cylindrical portion and extending radially inward from said cylindrical portion to define a first central opening which can receive a pipe, the base having a surface facing inwardly toward the first end; and iii) a plurality of discrete keys supported by the surface of the base of the cylindrical portion in outwardly bounding relation to the first central opening, the keys each having a free engaging end facing the first end cap, radially inward of an inner surface of said cylindrical portion and axially spaced outwardly from said annular base, and terminating at a distal end closer to said second end cap than said first end cap. 19. The filter element as in claim 18, wherein said first central opening is internal to the central cavity. 20. The filter element as in claim 18, wherein said free engaging end of each key is an edge. 21. The filter element as in claim 18, wherein the free engaging ends of the keys are internal to the central cavity and face toward the first end cap. 22. The filter element as in claim 18, wherein the keys are fixed to the annular base. 23. The filter element as in claim 18, wherein the keys are unitary with the cylindrical portion. 24. The filter element as in claim 18, wherein the cylindrical portion is unitary with the annular end cap portion. 25. The filter element as in claim 18, wherein said keys are axially elongated. 26. The filter element as in claim 18, wherein said first end cap is annular and imperforate. 27. The filter element as in claim 18, wherein the cylindrical portion and annular base are imperforate. 28. The filter element as in claim 18, wherein an end wall encloses one end of the cylindrical portion to define a cup-shaped valve structure receiving cavity. 29. A filter element comprising: a ring of filter media defining a central cavity and circumscribing a central axis, said ring of filter media having a first end and a second end; first and second end caps fixed to said first and second ends, respectively, of said filter media, the second end cap having i) an annular end cap portion sealingly bonded to the second end of said filter media, and ii) an annular base radially inward of the media ring defining a first central opening and having an annular flat surface facing the first end, and a plurality of keys each projecting axially from a first end supported by the surface of the base in outwardly bounding relation to the first central opening, toward the first end cap to a second, distal free end spaced axially away from the base, and terminating closer to said second end cap than said first end cap. 30. The filter element as in claim 29, wherein the keys are unitary with the base. 31. The filter element as in claim 29,wherein the annular base is supported by the end cap portion. 32. The filter element as in claim 31, wherein the annular base is integral with the end cap portion. 33. The filter element as in claim 29, wherein the first end cap also has an annular end cap portion sealingly bonded to the first end of the filter media, and circumscribes a second central opening, and wherein the first central opening of the annular base has a smaller diameter than the second central opening of the first end cap. 34. The filter element as in claim 33, wherein a resilient seal inwardly bounds the second central opening of the first end cap. 35. The filter element as in claim 29, further including a cylindrical portion between the annular end cap portion and the annular base, and at least one resilient barb unitary with and external to the cylindrical portion. 36. A filter element comprising: a ring of filter media defining a central cavity and circumscribing a central axis, said ring of filter media having a first end and a second end; first and second end cap assemblies fixed to said first and second ends, respectively, of said filter media, the second end cap assembly having i) an annular end cap portion sealingly bonded to the second end of said filter media; and ii) a valve actuating portion, said valve actuating portion including a) an annular base radially inward of the end cap portion, and circumscribing a first central opening and having an annular flat surface facing toward the first end cap, and b) a cup-shaped cylindrical portion having an first, open end connected to the annular base and bounding the first central opening, the cylindrical portion projecting axially from the base in an outward direction away from the first end cap to a second, closed end, and c) a plurality of keys each projecting from a first end supported by the surface of the base in outwardly bounding relation to the first central opening, in an axially inward direction toward the first end cap to a second, distal free end spaced axially away from the base, and terminating closer to said second end cap than said first end cap. 37. The filter element as in claim 36, wherein the cylindrical portion is unitary with the base. 38. The filter element as in claim 36, wherein the cylindrical portion radially inwardly bounds the annular end cap portion. 39. The filter element as in claim 38, wherein the cylindrical portion is unitary with the annular end cap portion. 40. The filter element as in claim 36, further including at least one resilient barb unitary with and external to the cylindrical portion. 41. The filter element as in claim 36, further including an annular resilient barb circumscribing the outer periphery of the cylindrical portion. 42. The filter element as in claim 36, wherein the keys are unitary with the base. 43. The filter element as in claim 36, wherein the annular base is supported by the end cap portion. 44. The filter element as in claim 43, wherein the annular base is integral with the end cap portion. 45. The filter element as in claim 36, wherein the first end cap also has an annular end cap portion sealingly bonded to the first end of the filter media, and circumscribes a second central opening, and wherein the first central opening of the annular base has a smaller diameter than the second central opening of the first end cap. 46. The filter element as in claim 45, wherein a resilient seal inwardly bounds the second central opening of the first end cap.
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