US3962095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialyser cartridge
Assignee: Sandoz AG
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Filing: 1974-11-04
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Granted: 1976-06-08
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Expires: 1994-11-04
Abstract
Abstract The invention concerns a novel dialyser cartridge comprising a flat membrane tube through which blood to be dialysed may be passed, membrane support material over the outer surfaces of the membrane tube, a split core between which a central portion of the membrane tube and membrane support material is located and about which core said membrane tube and membrane support material are outwardly spirally wound so that the free ends of the membrane tube and membrane support material are situated at the outer periphery of the winding, a hollow cylindrically walled casing encasing the split core and spirally wound membrane tube and membrane support material, blood inlet means for connection to an arterial line and blood outlet means for connection to a blood venous line leading through the circumferential wall of the casing into the ends of the membrane tube, and a pair of end covers fixed to the ends of the hollow cylindrical casing, one end cover having a dialysate inlet for connection to a dialysate supply line and the other end cover having a dialysate outlet for connection to a dialysate take-off line.
Inventors
- 👤 Liberto Luppi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:43
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/10; B01D63/101; B01D61/00; B01D61/24; B01D61/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
260 words
A dialyser cartridge comprising a flat membrane tube through which blood to be dialysed may be passed, membrane support material over the outer surfaces of the membrane tube, a split core between which a central portion of the membrane tube and membrane support material is located and about which core said membrane tube and membrane support material are outwardly spirally wound so that the free ends of the membrane tube and membrane support material are situated at the outer periphery of the winding, the membrane support material comprising bands of sheet material having on one side a series of spaced apart parallel ribs lying against the outer surface of the membrane tube, the membrane tube being sandwiched between a pair of such bands with their ribs facing inwardly towards one another, the series of parallel ribs against one side of the membrane tube being at an angle relative to the series of parallel ribs against the other side of the membrane tube, a hollow cylindrically walled casing encasing the split core and spirally wound membrane tube and membrane support material, blood inlet means for connection to an arterial line and blood outlet means for connection to a blood venous line leading through the circumferential wall of the casing into the ends of the membrane tube, and a pair of end covers fixed to the ends of the hollow cylindrical casing, one end cover having a dialysate inlet for connection to a dialysate supply line and the other end cover having a dialysate outlet for connection to a dialysate take-off line.
Claim 2
Dependent Claim
260 words
A dialyser cartridge comprising a flat membrane tube through which blood to be dialysed may be passed, membrane support material over the outer surfaces of the membrane tube, a split core between which a central portion of the membrane tube and membrane support material is located and about which core said membrane tube and membrane support material are outwardly spirally wound so that the free ends of the membrane tube and membrane support material are situated at the outer periphery of the winding, the membrane support material comprising bands of sheet material having on one side a series of spaced apart parallel ribs lying against the outer surface of the membrane tube, the membrane tube being sandwiched between a pair of such bands with their ribs facing inwardly towards one another, the series of parallel ribs against one side of the membrane tube being at an angle relative to the series of parallel ribs against the other side of the membrane tube, a hollow cylindrically walled casing encasing the split core and spirally wound membrane tube and membrane support material, blood inlet means for connection to an arterial line and blood outlet means for connection to a blood venous line leading through the circumferential wall of the casing into the ends of the membrane tube, and a pair of end covers fixed to the ends of the hollow cylindrical casing, one end cover having a dialysate inlet for connection to a dialysate supply line and the other end cover having a dialysate outlet for connection to a dialysate take-off line.
Claim 3
Dependent Claim
56 words
A dialyser cartridge according to claim 1, wherein the parallel members against one side of the membrane tube are at an acute angle relative to the axis of the cylindrical casing, and wherein the parallel members against the other side of the membrane tube are at the same but opposite acute angle relative to said axis.
Claim 4
Dependent Claim
33 words
A dialyser cartridge according to claim 2, wherein the parallel members having a series of spaced grooves in adjacent parallel members, said grooves being substantially parallel to the length of the membrane tube.
Claim 5
Dependent Claim
32 words
A dialyser cartridge according to claim 1, wherein the split defined by the split core is of substantially S-section, and wherein the split core as a whole is of substantially circular section.
Claim 6
Dependent Claim
55 words
A dialyser cartridge according to claim 1, wherein the hollow cylindrically walled casing has at its inner surface a pair of radially directed abutment faces of a breadth corresponding to the thickness of the membrane support material to abut against the free ends of the membrane support material at the outer periphery of the spiral.
Claim 7
Dependent Claim
51 words
A dialyser cartridge according to claim 1, wherein the blood inlet and blood outlet means comprise connector elements having means for connection to an arterial line and venous line respectively and having flat convex-sectioned hollow mouth sections sealingly located in the ends of the flat membrane tube between its adjacent sheets.
Claim 8
Dependent Claim
34 words
A dialyser cartridge according to claim 1, wherein the ends of the membrane tube and the blood inlet and blood outlet means are located between seals provided in the circumferential walls of the casing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |