US3770384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-phase fluid flow guide for blood oxygenator
Assignee: Individual
•
Filing: 1971-11-29
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Granted: 1973-11-06
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Expires: 1991-11-29
Abstract
Abstract Blood flows in extra-corporeal blood circulation into a blood oxygenator. The oxygenating gas enters the blood streams through a means providing oxygenating gas injection, adjacent a means providing blood inlet. The pair of means co-react to provide twophase flow of blood and oxygenating gas bubbles for the two-phase fluid flow guide. The flow guide has a multiplicity of fluid guide, solid walls of equal length, one wall uniformly closely spaced to another wall. The spaced walls are held in a boundary case by wall securing means which provide a uniform base terminus position and a uniform top terminus position for the walls. The boundary case can have a case length at least equal to the fluid guide wall lengths and greater. The fluid guide solid wall can have multiple, uniform cross section flow control channels disposed in the wall, extending normally to the base terminus and the top terminus of the wall. The flow control channels stabilize the upward flow of the two-phase blood and oxygenating gas combination. The flow control channels stabilize the gas bubbleliquid interface flow geometry, and facilitate the rapid fixation of oxygen by the blood and the release of carbon dioxide into the gas phase exiting from the top terminus of the two-phase fluid flow guide.
Inventors
- 👤 R Brumfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:27
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/32; A61M1/322; Y; Y10; Y10S; Y10S128/00; Y10S128/03; Y10S261/00; Y10S261/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
24 words
A combination as set forth in claim 1 wherein said flow control channels have semi-circular cross-sections, whose diameters range from one-eighth to five-sixteenths inch.
Claim 2
Dependent Claim
28 words
A combination as set forth in claim 1 wherein said flow control channels have alternatively reversed semi-circular corrugation cross sections, whose diameters range from one-eighth to five-sixteenths inch.
Claim 3
Dependent Claim
42 words
A combination as set forth in claim 1 wherein each said flow control channel has a rec-tangular cross section ranging from a channel width value of one-eighth to five-sixteenths inch and a channel depth value ranging from one-sixteenth to five thirty-seconds inch.
Claim 4
Dependent Claim
191 words
An extra-corporeal blood oxygenator fluid flow guide suitable for exchanging oxygen for carbon dioxide in patient circulating blood, comprising in combination: a multiplicity of fluid guide solid plate walls of equal length, one wall uniformly closely spaced parallel to another wall, each one of said plate wall lengths having a base terminus and a top terminus, wall terminus means securing said multiplicity of fluid guide plate walls in a uniform base terminus position and a uniform top terminus position, a boundary case securing said multiplicity of fluid guide plate walls and said wall terminus means, said boundary case having a case length at least equal to said fluid guide wall lengths, means providing a single common patient blood inlet container, said means disposed conductively adjacent to said base terminus of said multiplicity of fluid guide plate walls, and means providing oxygenating gas bubble injection, said means providing oxygenating gas bubble injection into said patient blood disposed in said blood inlet container, whereby said fluid flow guide provides wall stabilized two-phase flow of oxygenating gas bubbles and blood from said fluid guide plate base terminus to said fluid guide plate top terminus.
Claim 5
Dependent Claim
44 words
A combination as set forth in claim 6 wherein said fluid guide solid plate walls have multiple, uniform cross section, flow control channels disposed on said solid wall, said multiple channels aligned normal to said base terminus and said top terminus of said wall.
Claim 6
Dependent Claim
25 words
A combination as set forth in claim 6 wherein said flow control channels have semi-circular cross sections, whose diameters range from one-eighth to five-sixteenths inch.
Claim 7
Dependent Claim
28 words
A combination as set forth in claim 6 wherein said flow control channels have alternatively reversed semi-circular corrugations cross sections, whose diameters range from one-eighth to five-sixteenths inch.
Claim 8
Dependent Claim
42 words
A combination as set forth in claim 6 wherein each said flow control channel has a rectangular cross section ranging from a channel width value of one-eighth to five-sixteenths inch and a channel depth value ranging from one-sixteenth to five thirty-seconds inch.
Claim 9
Dependent Claim
193 words
An extra-corporeal blood oxygenator flow guide suitable for exchanging oxygen for carbon dioxide in patient circulating blood, comprising in combination: a multiplicity of fluid guide tubes having thin solid walls and selected tube diameters, said tubes selected and disposed to provide uniform closely annularly spaced cylindrically concentric tubes of equal length, each one of said tubes having a base terminus and a top terminus, tube terminus means securing said multiplicity of fluid guide tubes in a uniform base terminus position and a uniform top terminus position, a boundary case securing said multiplicity of fluid guide tubes and said tube terminus means, said boundary case having a case length at least equal to said fluid guide tube length, means providing a single common patient blood inlet container, said means disposed conductively adjacEnt to said base terminus of said multiplicity of fluid guide tubes, and means providing oxygenating gas injection, said means providing oxygenating gas bubble injection into said patient blood disposed in said blood inlet container, whereby said fluid guide provides wall stabilized two-phase flow of oxygenating gas and blood from said fluid guide tube base terminus to said fluid guide tube top terminus.
Claim 10
Dependent Claim
46 words
A combination as set forth in claim 10 wherein said solid walls of said fluid guide tubes have multiple uniform cross section, flow control channels disposed on said solid wall, said multiple channels aligned normal to said base terminus and said top terminus of said wall.
Claim 11
Dependent Claim
25 words
A combination as set forth in claim 11 wherein said flow control channels have semi-circular cross sections, whose diameters range from one-eighth to five-sixteenths inch.
Claim 12
Dependent Claim
28 words
A combination as set forth in claim 11 wherein said flow control channels have alternatively reversed semi-circular corrugations cross sections, whose diameters range from one-eighth to five-sixteenths inch.
Claim 13
Dependent Claim
42 words
A combination as set forth in claim 11 wherein each said flow control channel has a rectangular cross section ranging from a channel width value of one-eighth to five-sixteenths inch and a channel depth value ranging from one-sixteenth to five thirty-seconds inch.
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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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |