US3771899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsator pump and heat exchanger for blood
Assignee: Individual
•
Filing: 1971-12-13
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Granted: 1973-11-13
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Expires: 1991-12-13
Abstract
Abstract A slow variable speed drive rotates a pulsator pump and heat exchanger which can circulate pulsed blood flow extra-corporeally at a required blood temperature to a patient. The pump has a cylindrical rotor shell permanently mounted in a closely fitting internally cylindrical stator housing. The rotor has a support shaft which is eccentrically disposed parallel to the internal axis of symmetry of the stator housing and also to the rotor symmetry axis. Thus the rotor shell has its exterior surface also eccentrically disposed parallel to the rotor shaft axis of symmetry, providing controlled laminar flow of admitted blood. Laminar flow pumping means are provided, together with Taylor mixing vortices. Admitted patient blood is pumped as a thin blood film in pulsed laminar flow between the rotor and stator as the rotor exterior surface eccentrically approaches the stator surface, and in pulsed laminar Taylor vortex flow as the rotor surface recedes from the stator surface. The blood is introduced into the pump through a manifolded blood inlet having a longitudinal groove disposed in the inner face of the stator housing, the groove distributing blood to the annular space between the rotor and stator. A second similar blood outlet combination includes a longitudinal groove in the inner stator face, facilitating blood removal from the pump. The manifolded and jacketed stator housing provides heat transfer means for controlling the temperature of treated-blood of the patient.
Inventors
- 👤 R Brumfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:25
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/001; A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/26; A61M1/262; A61M1/265; A61M1/267; A61M1/36; A61M1/3621; A61M1/3623; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/20; A61M60/205; A61M60/216; A61M60/30; A61M60/31; A61M60/32; A61M60/33; A61M60/36; A61M60/40; A61M60/403; A61M60/422; A61M60/50; A61M60/508; A61M60/538; A61M60/546; A61M60/80; A61M60/802; A61M60/818; A61M60/825; A61M60/827; A61M2205/00; A61M2205/33; A61M2205/3331; A61M2205/3334; A61M2205/36; A61M2205/366; A61M60/113; A61M60/829; Y; Y10; Y10S; Y10S128/00; Y10S128/01; Y10S128/03; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
286 words
In an apparatus for pumping extra-corporeal patient blood, said apparatus having a right cylinder rotor secured on a rotor shaft, an internally cylindrical stator housing cylindrically enclosing said rotor, and means providing cooperative bearing support for said rotor shaft, the blood transport pump combination comprising: a rigid cylindrical rotor shell having its rotational axis of symmetry precisely displaced parallel to the rotor axis of symmetry, said rotor shell and said rotor shaft being positively secured together, said rotor shaft adaptively disposed in said stator housing, said shell having an external diameter precisely less than said internal diameter of said stator housing. a pair of rotor shaft bearing supports, each one of said pair of bearing supports disposed adjacent one shaft terminus, said bearing supports secured to precise positions on said rotor shaft, a pair of eccentricity adapters, each one of said adapters cooperatively securing one of said pair of bearing supports, disposing said rotor shaft in a precisely fixed resultant eccentricity parallel with the internal axis of symmetry of said internally cylindrical stator housing, a blood laminar flow arc sector precisely disposed between said rotor and said stator housing, said resultant eccentricity cooperatively fixing the laminar flow arc sector value, said arc sector providing blood pumping means during rotation of said rotor, and a blood Taylor vortex flow arc sector precisely disposed between said rotor and said stator housing, said resultant eccentricity cooperatively fixing said Taylor vortex arc sector value, said arc sector providing blood film mixing means during rotation of said rotor; whereby the rotating said rotor provides pulsed laminar blood flow in said laminar flow arc sector and provides pulsed laminar transitional and Taylor vortex flow in the remainder of the pump arc sector.
Claim 2
Dependent Claim
286 words
In an apparatus for pumping extra-corporeal patient blood, said apparatus having a right cylinder rotor secured on a rotor shaft, an internally cylindrical stator housing cylindrically enclosing said rotor, and means providing cooperative bearing support for said rotor shaft, the blood transport pump combination comprising: a rigid cylindrical rotor shell having its rotational axis of symmetry precisely displaced parallel to the rotor axis of symmetry, said rotor shell and said rotor shaft being positively secured together, said rotor shaft adaptively disposed in said stator housing, said shell having an external diameter precisely less than said internal diameter of said stator housing. a pair of rotor shaft bearing supports, each one of said pair of bearing supports disposed adjacent one shaft terminus, said bearing supports secured to precise positions on said rotor shaft, a pair of eccentricity adapters, each one of said adapters cooperatively securing one of said pair of bearing supports, disposing said rotor shaft in a precisely fixed resultant eccentricity parallel with the internal axis of symmetry of said internally cylindrical stator housing, a blood laminar flow arc sector precisely disposed between said rotor and said stator housing, said resultant eccentricity cooperatively fixing the laminar flow arc sector value, said arc sector providing blood pumping means during rotation of said rotor, and a blood Taylor vortex flow arc sector precisely disposed between said rotor and said stator housing, said resultant eccentricity cooperatively fixing said Taylor vortex arc sector value, said arc sector providing blood film mixing means during rotation of said rotor; whereby the rotating said rotor provides pulsed laminar blood flow in said laminar flow arc sector and provides pulsed laminar transitional and Taylor vortex flow in the remainder of the pump arc sector.
Claim 3
Dependent Claim
63 words
An apparatus in accordance with claim 1 wherein a heat transfer shell jacket covers the external cylinder face of said stator housing, said jacket having a fluid inlet conduit and a fluid outlet conduit secured to said jacket, said inlet conduit, said jacket and said outlet conduit together providing a serial passageway for a heat transfer fluid suitable for controlling patient blood temperature.
Claim 4
Dependent Claim
249 words
A blood transport pulsator pump combination comprising: a slow speed drive and a rotor shaft means coaxially secured together, a cylindrical pump rotor having its cylindrical axis of symmetry precisely displaced parallel to the rotor axis of symmetry, said rotor mounted on and secured to said rotor shaft means, together providing a blood pump rotor means, an internally cylindrical stator pump housing fitting around and cylindrically enclosing said pump rotor, said rotor shaft means being eccentrically disposed parallel to the internal axis of symmetry of said stator pump housing, said pump housing and said pump rotor proportioned and cylindrically axially copositioned providing a substantial thin annular laminar flow arc area during rotor rotation, and cooperatively providing a substantial Taylor vortex flow arc sector area during rotor rotation, means providing cooperative bearing support, securing said rotor shaft means and said stator housing, means providing cooperative blood sealing support, securing said rotor shaft meAns and said stator housing, means providing heat transfer control disposed in the wall of said stator pump housing, providing temperature control of blood pumped, means conductively secured to said stator housing, adjacent to said area of laminar flow of blood, providing a blood inlet conduit, means conductively secured to said stator housing disposed in said area of laminar flow of blood, providing a blood outlet conduit, whereby the rotating said rotor provides laminar blood flow in said laminar flow arc sector and provides laminar transitional and Taylor vortex flow in the remainder of the pump arc sector.
Claim 5
Dependent Claim
249 words
A blood transport pulsator pump combination comprising: a slow speed drive and a rotor shaft means coaxially secured together, a cylindrical pump rotor having its cylindrical axis of symmetry precisely displaced parallel to the rotor axis of symmetry, said rotor mounted on and secured to said rotor shaft means, together providing a blood pump rotor means, an internally cylindrical stator pump housing fitting around and cylindrically enclosing said pump rotor, said rotor shaft means being eccentrically disposed parallel to the internal axis of symmetry of said stator pump housing, said pump housing and said pump rotor proportioned and cylindrically axially copositioned providing a substantial thin annular laminar flow arc area during rotor rotation, and cooperatively providing a substantial Taylor vortex flow arc sector area during rotor rotation, means providing cooperative bearing support, securing said rotor shaft means and said stator housing, means providing cooperative blood sealing support, securing said rotor shaft meAns and said stator housing, means providing heat transfer control disposed in the wall of said stator pump housing, providing temperature control of blood pumped, means conductively secured to said stator housing, adjacent to said area of laminar flow of blood, providing a blood inlet conduit, means conductively secured to said stator housing disposed in said area of laminar flow of blood, providing a blood outlet conduit, whereby the rotating said rotor provides laminar blood flow in said laminar flow arc sector and provides laminar transitional and Taylor vortex flow in the remainder of the pump arc sector.
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |