US3864055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumps capable of use as heart pumps and blood pumps
Assignee: Individual
•
Filing: 1973-11-09
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Granted: 1975-02-04
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Expires: 1993-11-09
Abstract
Abstract Pumps and pumping methods wherein rotators having radial extent cause propulsion of the pumped fluid and wherein the rotators are outwardly convergent one toward another whereby the product, fluid volume times fluid velocity, at each radial location is substantially constant. The pumps are capable of use as heart pumps, blood pumps, and as pumps to pump all types of natural or artificial biological fluids in connnection with the maintenance of life and/or biological functions in a human body, animal body, or any other pumping function. The pumps can be used to replace or assist the pumping functions of the heart in vivo or ex vivo. The pumps can be used to pump biological fluids in vitro or in any in vivo, ex vivo, and in vitro combination. The pumps may be also used to pump natural or artificial biological fluids as well as nonbiological fluids. The nonbiological fluids so pumped may be pumped in connection with biological or nonbiological activities, functions, and/or applications.
Inventors
- 👤 Harold D Kletschka
- 👤 Edson H Rafferty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:33
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/001; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/117; A61M60/122; A61M60/196; A61M60/20; A61M60/205; A61M60/216; A61M60/221; A61M60/237; A61M60/40; A61M60/403; A61M60/408; A61M60/411; A61M60/416; A61M60/80; A61M60/802; A61M60/81; A61M60/818; A61M60/825; A61M60/827; A61M60/126; A61M60/148; F05; F05B; F05B2200/00; F05B2200/10; F05B2200/15; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
126 words
A method of pumping blood which is subject to damage under impact and shear, said method comprising rotating an impeller having a pair of axially spaced smooth discs that define a constant annular cross sectional vaneless pumping chamber therebetween, providing one disc with a central opening communicating with the inner portion of said annular pumping chamber, subjecting the blood to centrifugal action by engagement with the smooth walls of the rotating discs that define the pumping chamber, increasing the outward movement of blood under laminar flow conditions without appreciable turbulance to the outer peripheries of the discs and collecting the discharged laminar flow of said blood from said pumping chamber in an annular unobstructed chamber about said discs without subjecting the blood to impact and/or shear.
Claim 2
Independent Claim
126 words
A method of pumping blood which is subject to damage under impact and shear, said method comprising rotating an impeller having a pair of axially spaced smooth discs that define a constant annular cross sectional vaneless pumping chamber therebetween, providing one disc with a central opening communicating with the inner portion of said annular pumping chamber, subjecting the blood to centrifugal action by engagement with the smooth walls of the rotating discs that define the pumping chamber, increasing the outward movement of blood under laminar flow conditions without appreciable turbulance to the outer peripheries of the discs and collecting the discharged laminar flow of said blood from said pumping chamber in an annular unobstructed chamber about said discs without subjecting the blood to impact and/or shear.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the discs converge outward of their centers.
Claim 4
Dependent Claim
25 words
A method according to claim 1 wherein the outer portion of the pumping chamber is spaced axially of the inner portion of the pumping chamber.
Claim 5
Independent Claim
138 words
A method of pumping natural and artificial fluids which are subject to damage under impact and shear, said method comprising rotating an impeller having a pair of axially spaced smooth discs that define a constant annular cross sectional vaneless pumping chamber therebetween, providing one disc with a central opening communicating with the inner portion of said annular pumping chamber, subjecting the fluid to centrifugal action by engagement with the smooth walls of the rotating discs that defiNe the pumping chamber, increasing the outward movement of fluid under laminar flow conditions without appreciable turbulance to the outer peripheries of the discs and collecting the discharged laminar flow of said fluid from said pumping chamber in an annular unobstructed fluid from said pumping chamber in an annular unobstructed chamber about said discs without subjecting the fluid to impact and/or shear.
Claim 6
Independent Claim
138 words
A method of pumping natural and artificial fluids which are subject to damage under impact and shear, said method comprising rotating an impeller having a pair of axially spaced smooth discs that define a constant annular cross sectional vaneless pumping chamber therebetween, providing one disc with a central opening communicating with the inner portion of said annular pumping chamber, subjecting the fluid to centrifugal action by engagement with the smooth walls of the rotating discs that defiNe the pumping chamber, increasing the outward movement of fluid under laminar flow conditions without appreciable turbulance to the outer peripheries of the discs and collecting the discharged laminar flow of said fluid from said pumping chamber in an annular unobstructed fluid from said pumping chamber in an annular unobstructed chamber about said discs without subjecting the fluid to impact and/or shear.
Claim 7
Dependent Claim
14 words
A method according to claim 4 wherein the discs converge outward of their centers.
Claim 8
Dependent Claim
25 words
A method according to claim 4 wherein the outer portion of the pumping chamber is spaced axially of the inner portion of the pumping chamber.
Claim 9
Independent Claim
130 words
A method of pumping blood which is subject to damage under impact and shear, said method comprising rotating an impeller having a plurality of axially spaced smooth discs that define constant annular cross sectional vaneless pumping chambers therebetween, providing all but the axially rearmost of the discs with central openings communicating with the inner portions of said annular pumping chambers, subjecting the blood to centrifugal action by engagement with the smooth walls of the rotating discs that define the pumping chambers, increasing the outward movement of blood under laminar flow conditions without appreciable turbulance to the outer peripheries of the discs and collecting the discharged laminar flow of said blood from said pumping chambers in an annular unobstructed chamber about said discs without subjecting the blood to impact and/or shear.
Claim 10
Independent Claim
130 words
A method of pumping blood which is subject to damage under impact and shear, said method comprising rotating an impeller having a plurality of axially spaced smooth discs that define constant annular cross sectional vaneless pumping chambers therebetween, providing all but the axially rearmost of the discs with central openings communicating with the inner portions of said annular pumping chambers, subjecting the blood to centrifugal action by engagement with the smooth walls of the rotating discs that define the pumping chambers, increasing the outward movement of blood under laminar flow conditions without appreciable turbulance to the outer peripheries of the discs and collecting the discharged laminar flow of said blood from said pumping chambers in an annular unobstructed chamber about said discs without subjecting the blood to impact and/or shear.
Claim 11
Dependent Claim
14 words
A method according to claim 7 wherein the discs converge outward of their centers.
Claim 12
Dependent Claim
21 words
A method according to claim 7 wherein the outer portion of each pumping chamber is spaced axially of its inner portion.
Claim 13
Independent Claim
133 words
A method of pumping natural and artificial fluids which are subject to damage under impact and shear, said method comprising rotating an impeller having a plurality of axially spaced smooth discs that define constant annular cross sectional vaneless pumping chambers therebetween, providing all but the axially rearmost of the discs with central openings communicating with the inner portions of said annular pumping chambers, subjecting the fluid to centrifugal action by engagement with the smooth walls of the rotating discs that define the pumping chambers, increasing the outward movement of fluid under laminar flow conditions without appreciable turbulance to the outer peripheries of the discs and collecting the discharged laminar flow of said fluid from said pumping chambers in an annular unobstructed chamber about said discs withhout subjecting the fluid to impact and/or shear.
Claim 14
Independent Claim
133 words
A method of pumping natural and artificial fluids which are subject to damage under impact and shear, said method comprising rotating an impeller having a plurality of axially spaced smooth discs that define constant annular cross sectional vaneless pumping chambers therebetween, providing all but the axially rearmost of the discs with central openings communicating with the inner portions of said annular pumping chambers, subjecting the fluid to centrifugal action by engagement with the smooth walls of the rotating discs that define the pumping chambers, increasing the outward movement of fluid under laminar flow conditions without appreciable turbulance to the outer peripheries of the discs and collecting the discharged laminar flow of said fluid from said pumping chambers in an annular unobstructed chamber about said discs withhout subjecting the fluid to impact and/or shear.
Claim 15
Dependent Claim
14 words
A method according to claim 10 wherein the discs converge outward of their centers.
Claim 16
Dependent Claim
21 words
A method according to claim 10 wherein the outer portion of each pumping chamber is spaced axially of its inner portion.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |