Patent US4619246A successfully refreshed from Google Patents.
US4619246A
Expired / Lapsed
US
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Collapsible filter basket
Assignee: William Cook Europe ApS
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Filing: 1985-05-20
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Granted: 1986-10-28
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Expires: 2005-05-20
Abstract
Abstract A plurality of resilient wires interconnected at their respective ends form a collapsible filter basket adapted to be introduced into a blood vessel of a patient. The basket in its expanded and relaxed state forms an apertured, elongate solid of revolution with pointed ends and has a base as measured between the pointed ends at least equal to the maximum diameter thereof. The design of the filter basket of the present invention facilitates insertion and adjustment of position or orientation once inserted and allows large masses of emboli to build up without seriously restricting the free area available for blood flow through the filter.
Inventors
- 👤 Arne Molgaard-Nielsen
- 👤 Rolf Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:56
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/0108; A61F2002/016; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0028; A61F2230/005; A61F2230/0063; A61F2230/0071; A61F2230/0073; A61F2230/0076
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
65 words
A collapsible filter basket adapted to be introduced into a blood vessel of a patient, comprising a plurality of resilient wires interconnected at their respective ends, said basket in its expanded and relaxed state assuming the shape of an apertured, elongate solid of revolution with pointed ends and having a length as measured between the pointed ends at least equal to the maximum diameter thereof.
Claim 2
Dependent Claim
65 words
A collapsible filter basket adapted to be introduced into a blood vessel of a patient, comprising a plurality of resilient wires interconnected at their respective ends, said basket in its expanded and relaxed state assuming the shape of an apertured, elongate solid of revolution with pointed ends and having a length as measured between the pointed ends at least equal to the maximum diameter thereof.
Claim 3
Dependent Claim
60 words
A filter basket as claimed in claim 1, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 4
Dependent Claim
33 words
A filter basket as claimed in claim 1, wherein the resilient wires extend in the form of helices on the surface of the solid of revolution, and all helices have the same hand.
Claim 5
Dependent Claim
25 words
A filter basket as claimed in claim 3, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 6
Dependent Claim
21 words
A filter basket as claimed claim 1, wherein the generatrix of the apertured solid of revolution is a smooth, quasi-sinusoid curve.
Claim 7
Dependent Claim
60 words
A filter basket as claimed in claim 5, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 8
Dependent Claim
32 words
A filter basket as claimed claim 5, wherein the resilient wires extend in the form of helices on the surface of the solid of revolution, and all helices have the same hand.
Claim 9
Dependent Claim
25 words
A filter basket as claimed in claim 7, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 10
Dependent Claim
23 words
A filter basket as claimed in claim 1, wherein the solid of revolution is symmetric about a median plane normal to its axis.
Claim 11
Dependent Claim
60 words
A filter basket as claimed in claim 9, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 12
Dependent Claim
32 words
A filter basket as claimed claim 9, wherein the resilient wires extend in the form of helices on the surface of the solid of revolution, and all helices have the same hand.
Claim 13
Dependent Claim
25 words
A filter basket as claimed in claim 11, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 14
Dependent Claim
21 words
A filter basket as claimed claim 9, wherein the generatrix of the apertured solid of revolution is a smooth, quasi-sinusoid curve.
Claim 15
Dependent Claim
60 words
A filter basket as claimed in claim 13, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 16
Dependent Claim
32 words
A filter basket as claimed claim 13, wherein the resilient wires extend in the form of helices on the surface of the solid of revolution, and all helices have the same hand.
Claim 17
Dependent Claim
25 words
A filter basket as claimed in claim 15, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 18
Dependent Claim
60 words
A filter basket as claimed in claim 16, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 19
Dependent Claim
25 words
A filter basket as claimed in claim 1, wherein the length of the solid of revolution is between 1.5 and 3 times its maximum diameter.
Claim 20
Dependent Claim
60 words
A filter basket as claimed in claim 18, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 21
Dependent Claim
32 words
A filter basket as claimed claim 18, wherein the resilient wires extend in the form of helices on the surface of the solid of revolution, and all helices have the same hand.
Claim 22
Dependent Claim
25 words
A filter basket as claimed in claim 20, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 23
Dependent Claim
21 words
A filter basket as claimed claim 18, wherein the generatrix of the apertured solid of revolution is a smooth, quasi-sinusoid curve.
Claim 24
Dependent Claim
60 words
A filter basket as claimed in claim 22, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 25
Dependent Claim
32 words
A filter basket as claimed claim 22, wherein the resilient wires extend in the form of helices on the surface of the solid of revolution, and all helices have the same hand.
Claim 26
Dependent Claim
25 words
A filter basket as claimed in claim 24, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 27
Dependent Claim
23 words
A filter basket as claimed in claim 18, wherein the solid of revolution is symmetric about a median plane normal to its axis.
Claim 28
Dependent Claim
60 words
A filter basket as claimed in claim 26, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 29
Dependent Claim
32 words
A filter basket as claimed claim 26, wherein the resilient wires extend in the form of helices on the surface of the solid of revolution, and all helices have the same hand.
Claim 30
Dependent Claim
25 words
A filter basket as claimed in claim 28, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 31
Dependent Claim
21 words
A filter basket as claimed claim 26, wherein the generatrix of the apertured solid of revolution is a smooth, quasi-sinusoid curve.
Claim 32
Dependent Claim
60 words
A filter basket as claimed in claim 30, further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 33
Dependent Claim
32 words
A filter basket as claimed claim 30, wherein the resilient wires extend in the form of helices on the surface of the solid of revolution, and all helices have the same hand.
Claim 34
Dependent Claim
25 words
A filter basket as claimed in claim 32, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 35
Dependent Claim
139 words
A collapsible filter basket adapted to be introduced into a blood vessel of a patient, comprising a plurality of resilient wires interconnected at their respective ends, said basket in its expanded and relaxed state assuming the shape of an apertured, elongate solid of revolution with pointed ends and with the resilient wires extending in the form of helices on the surface of the solid of revolution, said basket having a length as measured between the pointed ends at least equal to the maximum diameter thereof, said basket further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 36
Dependent Claim
139 words
A collapsible filter basket adapted to be introduced into a blood vessel of a patient, comprising a plurality of resilient wires interconnected at their respective ends, said basket in its expanded and relaxed state assuming the shape of an apertured, elongate solid of revolution with pointed ends and with the resilient wires extending in the form of helices on the surface of the solid of revolution, said basket having a length as measured between the pointed ends at least equal to the maximum diameter thereof, said basket further comprising a series of anchoring legs which at one end of the basket protrude outwardly at an angle to the axis of the solid of revolution, each leg formed at its free end with an outwardly bent hook, and having a S-shape with a pronounced outward curvature immediately adjacent the hook.
Claim 37
Dependent Claim
25 words
A filter basket as claimed in claim 34, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 38
Dependent Claim
22 words
A filter basket as claimed in claim 34, wherein the generatrix of the apertured solid of revolution is a smooth, quasi-sinusoid curve.
Claim 39
Dependent Claim
25 words
A filter basket as claimed in claim 36, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 40
Dependent Claim
23 words
A filter basket as claimed in claim 34, wherein the solid of revolution is symmetric about a median plane normal to its axis.
Claim 41
Dependent Claim
25 words
A filter basket as claimed in claim 38, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 42
Dependent Claim
22 words
A filter basket as claimed in claim 38, wherein the generatrix of the apertured solid of revolution is a smooth, quasi-sinusoid curve.
Claim 43
Dependent Claim
25 words
A filter basket as claimed in claim 34, wherein the length of the solid of revolution is between 1.5 and 3.0 times its maximum diameter.
Claim 44
Dependent Claim
25 words
A filter basket as claimed in claim 41, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 45
Dependent Claim
22 words
A filter basket as claimed in claim 41, wherein the generatrix of the apertured solid of revolution is a smooth, quasi-sinusoid curve.
Claim 46
Dependent Claim
25 words
A filter basket as claimed in claim 43, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 47
Dependent Claim
23 words
A filter basket as claimed in claim 41, wherein the solid of revolution is symmetric about a median plane normal to its axis.
Claim 48
Dependent Claim
25 words
A filter basket as claimed in claim 45, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
Claim 49
Dependent Claim
22 words
A filter basket as claimed in claim 45, wherein the generatrix of the apertured solid of revolution is a smooth, quasi-sinusoid curve.
Claim 50
Dependent Claim
25 words
A filter basket as claimed in claim 47, wherein the ends of each wire are spaced apart approximately 90° about the axis of the basket.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |