Patent US3892664A successfully refreshed from Google Patents.
US3892664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood dialyzer of the coil type
Assignee: Biomerieux BV
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Filing: 1973-07-26
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Granted: 1975-07-01
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Expires: 1993-07-26
Abstract
Abstract A blood dialyzer having a housing enclosing a cylindrical core with at least one opening therein, a tubular dialysis membrane wound about the core and tubes connected to the membrane for flow of blood therethrough is provided with a recess in the core wall adjacent to the opening to receive the pleated end of the membrane attached to the tube to reduce resistance to blood flow.
Inventors
- 👤 Assendelft Leendert Van
- 👤 Der Kloot Jacob M Van
- 👤 T Sant Antonie Van
- 👤 Hendrikus J Spekle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:01
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/10; B01D61/00; B01D61/24; B01D61/28; B01D2313/00; B01D2313/04; B01D2313/042
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
186 words
A BLOOD DIALYZER HAVING A SUBSTANTIALLY CYLINDRICAL HOUSING SUBSTANTIALLY CYLINDRICAL HOLLOW CORE MEMBER DISPOSED IN SAID HOUSING AND HAVING ITS WALL SPACED INWARDLY THEREFROM TO PROVIDE AN ANNULAR DIALYSIS SPACE THEREBETWEEN, A DIALYZER MEMBRANE AND SUPPORTING GAUZE WOUND ABOUT THE CORE MEMBER IN THE ANNULAR SPACE, MEANS FOR THE INTRODUCTION OF DIALYZER FLUID INTO THE DIALYSIS SPACE AND MEANS FOR FLOW OF DIALYZER FLUID FROM THE DIALYSIS SPACE, THE WALL OF SAID CORE MEMBER HAVING AN OPENING THEREIN, MEANS INTRODUCING BLOOD THROUGH THE OPENING INTO THE SAID MEMBRANE COMPRISING A BLOOD TUBE, A PLUG ABOUT THE TUBE AND IN SAID OPENING, ONE END OF SAID DIALYZER MEMBRANE BEING PLEATED TO REDUCE ITS CROSSSECTION TO CORRESPOND SUBSTANTIALLY TO THE CROSS-SECTION OF THE OPENING AND DISPOSED ABOUT THE SAID PLUG IN A SUBSTANTIALLY LIQUID IMPREVIOUS RELATIONSHIP, SAID WALL HAVING A RECESS WHICH EXTENDS CIRCUMFERENTIALLY FROM ADJACENT TO THE SAID OPENING ONLY PARTIALLY AROUND THE CORE MEMBER, SAID RECESS DIVERGING FROM SAID OPENING TOWARDS THE END OF THE CORE MEMBER, SAID PLEATED MEMBRANE BEING DISPOSED IN SAID RECESS, AND MEANS FOR REMOVING THE BLOOD AFTER DIALYSIS FROM THE DIALYZER.
Claim 2
Dependent Claim
186 words
A BLOOD DIALYZER HAVING A SUBSTANTIALLY CYLINDRICAL HOUSING SUBSTANTIALLY CYLINDRICAL HOLLOW CORE MEMBER DISPOSED IN SAID HOUSING AND HAVING ITS WALL SPACED INWARDLY THEREFROM TO PROVIDE AN ANNULAR DIALYSIS SPACE THEREBETWEEN, A DIALYZER MEMBRANE AND SUPPORTING GAUZE WOUND ABOUT THE CORE MEMBER IN THE ANNULAR SPACE, MEANS FOR THE INTRODUCTION OF DIALYZER FLUID INTO THE DIALYSIS SPACE AND MEANS FOR FLOW OF DIALYZER FLUID FROM THE DIALYSIS SPACE, THE WALL OF SAID CORE MEMBER HAVING AN OPENING THEREIN, MEANS INTRODUCING BLOOD THROUGH THE OPENING INTO THE SAID MEMBRANE COMPRISING A BLOOD TUBE, A PLUG ABOUT THE TUBE AND IN SAID OPENING, ONE END OF SAID DIALYZER MEMBRANE BEING PLEATED TO REDUCE ITS CROSSSECTION TO CORRESPOND SUBSTANTIALLY TO THE CROSS-SECTION OF THE OPENING AND DISPOSED ABOUT THE SAID PLUG IN A SUBSTANTIALLY LIQUID IMPREVIOUS RELATIONSHIP, SAID WALL HAVING A RECESS WHICH EXTENDS CIRCUMFERENTIALLY FROM ADJACENT TO THE SAID OPENING ONLY PARTIALLY AROUND THE CORE MEMBER, SAID RECESS DIVERGING FROM SAID OPENING TOWARDS THE END OF THE CORE MEMBER, SAID PLEATED MEMBRANE BEING DISPOSED IN SAID RECESS, AND MEANS FOR REMOVING THE BLOOD AFTER DIALYSIS FROM THE DIALYZER.
Claim 3
Dependent Claim
35 words
The blood dialyzer of claim 1 wherein the depth of the recess measured in the radial direction of the core is not more than forty times the thickness of the dialysis membrane in wet condition.
Claim 4
Dependent Claim
35 words
The blood dialyzer of claim 1 wherein the recess extends as far as the core opening and the width of the recess in the axial direction of the core gradually decreases towards the core opening.
Claim 5
Dependent Claim
31 words
The blood dialyzer of claim 1 wherein a strip extends over the core passage and between the first convolution of the dialysis membrane and the first convolution of the supporting screen.
Claim 6
Dependent Claim
39 words
The blood dialyzer of claim 4 wherein the strip is connected at one edge to the surface of the core and the opposite free edge thereof extends to beyond the core opening and over the recess in the core.
Claim 7
Dependent Claim
15 words
The blood dialyzer of claim 4 wherein the strip is a thin, semi-stiff plastic material.
Claim 8
Dependent Claim
30 words
The blood dialyzer of claim 1 wherein the end of the supporting gauze resting on the core is attached to the core surface near the wide mouth of the recess.
Claim 9
Dependent Claim
34 words
The blood dialyzer of claim 7 wherein at least the part of the recess located between the core opening and the end of the supporting gauze resting on the core is provided with ripples.
Claim 10
Dependent Claim
19 words
The blood dialyzer of claim 1 wherein a rigid-walled housing tightly surrounds the dialysis membrane wound on the core.
Claim 11
Dependent Claim
59 words
The blood dialyzer of claim 9 wherein the rigid-walled housing is provided with an opening supporting the second connection, said second connection comprises a hollow plug on which the outside open end of the dialysis membrane is secured liquid-tight, and a recess for receiving the part of the membrane near said second connection on the inside of the housing.
Claim 12
Dependent Claim
84 words
The blood dialyzer of claim 1 wherein the means for introducing blood into the dialysis membrane and means for removing blood therefrom are two blood tubes, each communicating with one end of the dialysis membrane by way of a connection which comprises a hollow plug connected to a blood tube and means for attaching an open end of the dialysis membrane liquid-tight on said plug, and a tape having a smooth side facing the attaching means and its opposite side facing the dialysis membrane.
Claim 13
Dependent Claim
18 words
The blood dialyzer of claim 11 wherein said tape is an adhesive which is smooth on one side.
Claim 14
Dependent Claim
80 words
The blood dialyzer of claim 1 wherein the means for introducing blood into the dialysis membrane and means for removing blood therefrom are two blood tubes each communicating with one end of the dialysis membrane by way of a connection which comprises a hollow plug connected to a blood tube and means for attaching one open end of the dialysis membrane liquid-tight on said plug, said hollow plug having a core of stiff material supporting a sheath of plastic material.
Claim 15
Dependent Claim
18 words
The blood dialyzer of claim 1 wherein the attaching means are formed by a knitted piece of core.
Claim 16
Dependent Claim
32 words
The dialyzer of claim 1 wherein a medical plaster having an adhesive side and a non-adhesive side is disposed between the membrane and plug with the adhesive side next to the plug.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |