US4019988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dialyzer membrane seal and tubing connector
Assignee: Extra Corporeal Medical Specialties Inc
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Filing: 1975-08-28
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Granted: 1977-04-26
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Expires: 1995-08-28
Abstract
Abstract Improved means of sealing the ends of tubular permeable membrane material in a dialyzer coil and providing connections to associated inlet and outlet tubing is disclosed. The tubular membrane material is sealed by clamping the ends thereof to the support material which provides an improved flow path of blood into and out of the permeable membrane material eliminating thrombus formation, clotting and flow restrictions within the dialyzer. A simplified and leakproof tubing connector is also disclosed.
Inventors
- 👤 Lloyd L. Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:37
CPC Classifications
B; B01; B01D; B01D63/00; B01D63/10; B01D63/101; B01D61/00; B01D61/24; B01D61/28; B01D2313/00; B01D2313/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
In a dialyzer coil comprising a core with permeable tubing and support material spirally wound thereon, blood inlet and outlet assemblies secured to the permeable tubing and a tubing clamp extending the length of at least one end of said permeable tubing to mechanically seal said tubing and secure it to the support material to promote transfer of the fluid weight in said tubing to the support material.
Claim 2
Dependent Claim
68 words
In a dialyzer coil comprising a core with permeable tubing and support material spirally wound thereon, blood inlet and outlet assemblies secured to the permeable tubing and a tubing clamp extending the length of at least one end of said permeable tubing to mechanically seal said tubing and secure it to the support material to promote transfer of the fluid weight in said tubing to the support material.
Claim 3
Dependent Claim
22 words
The dialyzer coil of claim 1 wherein the blood inlet and outlet assemblies comprise a flanged eyelet, push nut and compressible washer.
Claim 4
Dependent Claim
21 words
The dialyzer coil of claim 1 wherein an impervious strip is formed along at least one edge of the support material.
Claim 5
Dependent Claim
33 words
The dialyzer coil of claim 3 wherein the permeable tubing is folded over the strip formed along the edge of the support material and sealed to the support material by the tubing clamp.
Claim 6
Dependent Claim
40 words
The dialyzer coil of claim 4 wherein the impervious strip on the support material is wider than the tubing clamp to form a channel along the strip to promote fluid flow to and from the blood inlet and outlet assemblies.
Claim 7
Dependent Claim
19 words
The dialyzer coil of claim 1 wherein the core contains a recessed bore to receive the blood inlet assembly.
Claim 8
Dependent Claim
18 words
The dialyzer coil of claim 1 wherein the core contains a longitudinal notch to receive a tubing clamp.
Claim 9
Dependent Claim
22 words
The dialyzer coil of claim 1, wherein inlet and outlet tubing are connected to the inlet and outlet assemblies by retainer clamps.
Claim 10
Dependent Claim
19 words
The dialyzer coil of claim 8 wherein the retainer clamp for the inlet assembly is formed in the core.
References Cited (Backward Citations)
US2686154A
Cited
US3390779A
Cited
US3705652A
Cited
US3565258A
Cited
US3668837A
Cited
US3857785A
Cited
US3792978A
Cited
US3892664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |