US3885251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial heart pump or assist
Assignee: Philips North America LLC
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Filing: 1973-03-05
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Granted: 1975-05-27
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Expires: 1993-03-05
Abstract
Abstract An implantable artificial heart pump or heart assist for providing or enhancing a controlled cyclic blood flow through an artery, the pump including a tubular section secured between adjacent ends of a severed artery forming a continuous blood flow passage, and having a plurality of axially spaced but adjacent sleeves encircling this section. The sleeves are sequentially constricted about the tubular section to provide alternately pumping and suction upon the blood flowing through the section, the sleeves being energized by high and low pressure working fluid from an external or implantable power source. Where the power source is an implantable Stirling engine, pressure variations are available from the gas working space, or from an oil pump in the crankcase, or from a compressor driven by the engine.
Inventors
- 👤 Raul Ismael Pedroso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:47
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F04B43/10; F04B43/113; A; A61; A61M; A61M60/00; A61M60/10; A61M60/122; A61M60/126; A61M60/161; A61M60/196; A61M60/20; A61M60/247; A61M60/253; A61M60/268; A61M60/289; A61M60/40; A61M60/424; A61M60/427; A61M60/80; A61M60/855; A61M60/857; A61M60/89; A61M60/892; F02; F02G; F02G1/00; F02G1/04; F02G1/043; A61M60/279; A61M60/284; F02G2280/00; F02G2280/005
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
312 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each having a generally cylindrical bore at least partially surrounding and contacting said tube, the sleeves being axially spaced apart but adjacent to each other, a core element formed as a rod fixedly positioned generally centrally within the bore of said tube and adjacent the inner surface thereof, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, and valve means for communicating selectively said high and low pressure sources to said sleeves, whereby each sleeve periodically has a. a small diameter for constricting the tube to have a small bore diameter at the area of the tube adjacent said sleeve, and b. a large diameter permitting a corresponding large bore diameter of said tube with the tubes inner surface at that area being urged closely against said core to prevent blood flow in that area, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein, said apparatus further comprising an implantable Stirling engine including a heat Source for operating the engine, the engine having a working space wherein working gas experiences a cyclic pressure variation between high and low, the apparatus further comprising duct means communicating said high and low pressure gas to said valve means.
Claim 2
Dependent Claim
312 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each having a generally cylindrical bore at least partially surrounding and contacting said tube, the sleeves being axially spaced apart but adjacent to each other, a core element formed as a rod fixedly positioned generally centrally within the bore of said tube and adjacent the inner surface thereof, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, and valve means for communicating selectively said high and low pressure sources to said sleeves, whereby each sleeve periodically has a. a small diameter for constricting the tube to have a small bore diameter at the area of the tube adjacent said sleeve, and b. a large diameter permitting a corresponding large bore diameter of said tube with the tubes inner surface at that area being urged closely against said core to prevent blood flow in that area, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein, said apparatus further comprising an implantable Stirling engine including a heat Source for operating the engine, the engine having a working space wherein working gas experiences a cyclic pressure variation between high and low, the apparatus further comprising duct means communicating said high and low pressure gas to said valve means.
Claim 3
Dependent Claim
287 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accomodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each at least partially surrounding said tube, the sleeves being axially spaced apart but adjacent to each other, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, valve means for communicating selectively said high and low pressure sources to said sleeves, whereby each sleeve periodically has a small diameter for constricting the tube to have a small bore diameter adjacent said sleeve, and a large diameter permitting a corresponding large bore diameter of said tube, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefore of the tube to produce a pumping action in one direction on the blood flow therein, the pump further comprising an implantable Stirling engine including a heat source for operating the engine and a lubricating oil pump in the crankcase of the engine for providing oil under pressure, with crankcase interior being at a pressure lower than said oil pump pressure, the apparatus further comprising means communicating a portion of said oil under pressure to said valve means as said source of high pressure fluid, and means communicating the crankcase interior to said valve means as said source of low pressure fluid.
Claim 4
Dependent Claim
287 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accomodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each at least partially surrounding said tube, the sleeves being axially spaced apart but adjacent to each other, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, valve means for communicating selectively said high and low pressure sources to said sleeves, whereby each sleeve periodically has a small diameter for constricting the tube to have a small bore diameter adjacent said sleeve, and a large diameter permitting a corresponding large bore diameter of said tube, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefore of the tube to produce a pumping action in one direction on the blood flow therein, the pump further comprising an implantable Stirling engine including a heat source for operating the engine and a lubricating oil pump in the crankcase of the engine for providing oil under pressure, with crankcase interior being at a pressure lower than said oil pump pressure, the apparatus further comprising means communicating a portion of said oil under pressure to said valve means as said source of high pressure fluid, and means communicating the crankcase interior to said valve means as said source of low pressure fluid.
Claim 5
Dependent Claim
279 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising an implantable Stirling engine including a heat source for operating the engine and a mechanical power output of the engine a compressor driven by said power output, the compressor having a high pressure output port and a low pressure inlet port which constitute said high and low pressure sources of fluid, duct means communicating said ports to a valve means, and corresponding high and low pressure buffer chambers respectively intermediate said valve and said ports, a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each at least partially surrounding said tube, the sleeves being axially spaced apart but adjacent to each other, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, said valve means for communicating selectively said high and low pressure sources to said sleeves, whereby each sleeve periodically has a. a small diameter for constricting the tube to have a small bore diameter adjacent said sleeve, and b. a large diameter permitting a corresponding large bore diameter of said tube, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein.
Claim 6
Dependent Claim
279 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising an implantable Stirling engine including a heat source for operating the engine and a mechanical power output of the engine a compressor driven by said power output, the compressor having a high pressure output port and a low pressure inlet port which constitute said high and low pressure sources of fluid, duct means communicating said ports to a valve means, and corresponding high and low pressure buffer chambers respectively intermediate said valve and said ports, a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each at least partially surrounding said tube, the sleeves being axially spaced apart but adjacent to each other, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, said valve means for communicating selectively said high and low pressure sources to said sleeves, whereby each sleeve periodically has a. a small diameter for constricting the tube to have a small bore diameter adjacent said sleeve, and b. a large diameter permitting a corresponding large bore diameter of said tube, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein.
Claim 7
Dependent Claim
261 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and lOw pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each at least partially surrounding said tube, the sleeves being axially spaced apart but adjacent to each other, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, valve means for communicating selectively said high and low pressure sources to said sleeves, and wherein each sleeve comprises a tubular element defining a ringshaped hollow chamber with only one inlet-outlet port, each ring having a normal small diameter that is expandable to a large diameter when high pressure fluid is communicated to said inlet-outlet port, each ring having resilience to return to its normal small diameter when in communication with low pressure fluid whereby each sleeve periodically has a small diameter for constricting the tube to have a small bore diameter adjacent said sleeve, and a large diameter permitting a corresponding large bore diameter of said tube, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein.
Claim 8
Dependent Claim
261 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and lOw pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each at least partially surrounding said tube, the sleeves being axially spaced apart but adjacent to each other, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, valve means for communicating selectively said high and low pressure sources to said sleeves, and wherein each sleeve comprises a tubular element defining a ringshaped hollow chamber with only one inlet-outlet port, each ring having a normal small diameter that is expandable to a large diameter when high pressure fluid is communicated to said inlet-outlet port, each ring having resilience to return to its normal small diameter when in communication with low pressure fluid whereby each sleeve periodically has a small diameter for constricting the tube to have a small bore diameter adjacent said sleeve, and a large diameter permitting a corresponding large bore diameter of said tube, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein.
Claim 9
Dependent Claim
306 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, a core element formed as a rod fixedly positioned generally centrally within the bore of said tube and adjacent the inner surface thereof, at least two sleeves each at least partially surrounding said tube, the sleeves being axially spaced apart but adjacent to each other, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameter, valve means for communicating selectively said high and low pressure sources to said sleeves, the pump further comprising an implantable Stirling engine including a heat source for operating the engine, the engine having a working space wherein working gas experiences a cyclic pressure variation between high and low, the apparatus further comprising duct means communicating said high and low pressure gas to said valve means whereby each sleeve periodically has a small diameter for constricting the tube to have a small bore diameter adjacent said sleeve, and a large diameter permitting a corresponding large bore diameter of said tube, and constriction of each sleeve constricts the adjacent part of said tube, with the inner surface of said part urged closely against said core to prevent blood flow past said part, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein.
Claim 10
Dependent Claim
306 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, a core element formed as a rod fixedly positioned generally centrally within the bore of said tube and adjacent the inner surface thereof, at least two sleeves each at least partially surrounding said tube, the sleeves being axially spaced apart but adjacent to each other, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameter, valve means for communicating selectively said high and low pressure sources to said sleeves, the pump further comprising an implantable Stirling engine including a heat source for operating the engine, the engine having a working space wherein working gas experiences a cyclic pressure variation between high and low, the apparatus further comprising duct means communicating said high and low pressure gas to said valve means whereby each sleeve periodically has a small diameter for constricting the tube to have a small bore diameter adjacent said sleeve, and a large diameter permitting a corresponding large bore diameter of said tube, and constriction of each sleeve constricts the adjacent part of said tube, with the inner surface of said part urged closely against said core to prevent blood flow past said part, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein.
Claim 11
Dependent Claim
43 words
Apparatus according to claim 5 wherein said sleeves define an axial length between them and said core has length approximately equal to said axial length, the apparatus further comprising web means for fixedly positioning each end of said core relative to said tube.
Claim 12
Dependent Claim
218 words
A heart pump for attachment between the severed ends of a severed artery, comprising an implantable Stirling engine including a fluid therein that is cyclically under high and low pressure, a tube securable between said severed ends to form a continuous blood flow path, three sleeves axially spaced and having generally cylindrical bores positioned about and in contact with said tube, a core element formed as a rod fixedly positioned generally centrally within the bore of said tube and adjacent the inner surface thereof, valve means for cyclically and sequentially communicating said high and low pressure fluid to said sleeves, a buffer tank between said valve and each of said high and low pressure sources, means interconnecting said engine and said valve for cyclically controlling said valve according to the operation cycle of the engine, said sleeves designated first, second and third moving downstream of the flow, each having its diameter reduced when said high pressure is communicated thereto and expanded when said low pressure is communicated thereto and the tube in the areas surrounded by the sleeves having corresponding diameter constrictions and expansions with the tubes inner surface at each of said areas being urged closely against said core to prevent blood flow in said areas respectively, whereby the tube diameter adjacent the sleeves is as follows:
Claim 13
Dependent Claim
218 words
A heart pump for attachment between the severed ends of a severed artery, comprising an implantable Stirling engine including a fluid therein that is cyclically under high and low pressure, a tube securable between said severed ends to form a continuous blood flow path, three sleeves axially spaced and having generally cylindrical bores positioned about and in contact with said tube, a core element formed as a rod fixedly positioned generally centrally within the bore of said tube and adjacent the inner surface thereof, valve means for cyclically and sequentially communicating said high and low pressure fluid to said sleeves, a buffer tank between said valve and each of said high and low pressure sources, means interconnecting said engine and said valve for cyclically controlling said valve according to the operation cycle of the engine, said sleeves designated first, second and third moving downstream of the flow, each having its diameter reduced when said high pressure is communicated thereto and expanded when said low pressure is communicated thereto and the tube in the areas surrounded by the sleeves having corresponding diameter constrictions and expansions with the tubes inner surface at each of said areas being urged closely against said core to prevent blood flow in said areas respectively, whereby the tube diameter adjacent the sleeves is as follows:
Claim 14
Dependent Claim
266 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each having a generally cylindrical bore at least partially surrounding and contacting said tube, the sleeves being axially spaced apart but adjacent to each other, a core element formed as a rod fixedly positioned generally centrally within the bore of said tube and adjacent the inner surface thereof, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, and valve means for communicating selectively said high and low pressure sources to said sleeves, whereby each sleeve periodically has a. a small diameter for constricting the tube to have a small bore diameter at the area of the tube adjacent said sleeve with the tubes''s inner surface at the area being urged closely against said core to prevent blood flow in that area, and b. a large diameter permitting a corresponding large bore diameter of said tube, and thereby permitting blood flow, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein.
Claim 15
Dependent Claim
266 words
An implantable heart pump for pumping and controlling the flow of blood through an artery which is severable to expose two adjacent ends to accommodate the pump therebetween, this pump being operable with first and second sources of high and low pressure fluid respectively, the pump comprising a tube securable between said severed ends of said artery to form a continuous blood flow passage, at least two sleeves each having a generally cylindrical bore at least partially surrounding and contacting said tube, the sleeves being axially spaced apart but adjacent to each other, a core element formed as a rod fixedly positioned generally centrally within the bore of said tube and adjacent the inner surface thereof, the tube having a bore diameter that is variable between large and small, each sleeve being responsive to a pressure change whereby its diameter is variable between large and small corresponding to said tube bore diameters, and valve means for communicating selectively said high and low pressure sources to said sleeves, whereby each sleeve periodically has a. a small diameter for constricting the tube to have a small bore diameter at the area of the tube adjacent said sleeve with the tubes''s inner surface at the area being urged closely against said core to prevent blood flow in that area, and b. a large diameter permitting a corresponding large bore diameter of said tube, and thereby permitting blood flow, the valve providing a predetermined sequence of constrictions and expansions of the sleeves and therefor of the tube to produce a pumping action in one direction on the blood flow therein.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |