US5055005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pump with levitated impeller
Assignee: Individual
•
Filing: 1990-10-05
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Granted: 1991-10-08
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Expires: 2010-10-05
Abstract
Abstract A fluid pump with rotary impeller is disclosed which comprises an electromagnetically driven rotary impeller levitated by localized opposed fluid forces. Levitation by localized opposed fluid forces of an impeller driven by electromagnetic forces eliminates the need for bearings and seals in the driving mechanism. This avoids the heat build-up and leakage associated with other pumping mechanisms, which can be of importance for pumping of physiological fluids such as blood. The levitating fluid forces of the present invention are auto-adjusting, such that any attempted displacement of the impeller will automatically incur a corrective change in levitating fluid forces. However, fluid force sensors and regulators could be incorporated into the present invention if desired. The invention should be of use in numerous medical and non-medical applications where the benefits of impeller levitation by localized fluid forces are apparent.
Inventors
- 👤 Harold D. Kletschka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:39
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/048; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/109; A61M60/122; A61M60/20; A61M60/205; A61M60/216; A61M60/221; A61M60/226; A61M60/232; A61M60/40; A61M60/403; A61M60/422; A61M60/50; A61M60/508; A61M60/562; A61M60/80; A61M60/802; A61M60/804; A61M60/81; A61M60/814; A61M60/818; A61M60/82; A61M60/822; A61M60/824; A61M60/827; A61M60/829; F04D13/00; F04D13/02; F04D13/06; F04D29/18; F04D29/186; F04D29/40; F04D29/42; F04D29/426; F04D29/44; F04D29/445; F04D5/00; F04D5/001; H; H02; H02K; H02K7/00; H02K7/14; A61M60/126; A61M60/148; A61M60/165; A61M60/178; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
88 words
A method for stabilizing the position of a rotatable impeller suspended in fluid in a pumping chamber, the impeller having an axis of rotation, the pumping chamber having a pumping chamber inlet port and a pumping chamber outlet port, which comprises: the step of conducting fluid from the periphery of the impeller and discharging the fluid in the pumping chamber in general proximity to the axis of the impeller in opposed directions to thereby stabilize the position of the impeller in the pumping chamber by levitating fluid forces.
Claim 2
Independent Claim
88 words
A method for stabilizing the position of a rotatable impeller suspended in fluid in a pumping chamber, the impeller having an axis of rotation, the pumping chamber having a pumping chamber inlet port and a pumping chamber outlet port, which comprises: the step of conducting fluid from the periphery of the impeller and discharging the fluid in the pumping chamber in general proximity to the axis of the impeller in opposed directions to thereby stabilize the position of the impeller in the pumping chamber by levitating fluid forces.
Claim 3
Dependent Claim
38 words
The method of claim 1, wherein the impeller possesses opposed inlets in proximity to the axis of rotation and opposed outlets at the periphery of the impeller spaced from the inlets communicating with the pumping chamber outlet port.
Claim 4
Dependent Claim
48 words
The method of claim 1 wherein the impeller possesses a single inlet in general proximity to the axis of the impeller communicating with the pumping chamber inlet port, and opposed outlets at the periphery of the impeller spaced from the inlets communicating with the pumping chamber outlet port.
Claim 5
Dependent Claim
17 words
The method of claim 1 and means for regulating the discharge of the fluid toward the impeller.
Claim 6
Dependent Claim
85 words
A fluid pump comprising: a. a housing defining a pumping chamber, a pumping chamber inlet port and a pumping chamber outlet port, b. a rotatable impeller, disposed in the pumping chamber for rotation about an axis, c. polarized electromagnetic means for rotating the impeller about the axis, and d. means for conducting fluid from the peripheral region of the impeller and discharging the fluid in opposed directions in general proximity to the axis of the impeller, to thereby stabilize the impeller by levitating fluid forces.
Claim 7
Dependent Claim
85 words
A fluid pump comprising: a. a housing defining a pumping chamber, a pumping chamber inlet port and a pumping chamber outlet port, b. a rotatable impeller, disposed in the pumping chamber for rotation about an axis, c. polarized electromagnetic means for rotating the impeller about the axis, and d. means for conducting fluid from the peripheral region of the impeller and discharging the fluid in opposed directions in general proximity to the axis of the impeller, to thereby stabilize the impeller by levitating fluid forces.
Claim 8
Dependent Claim
48 words
The fluid pump of claim 5, wherein the impeller possesses a single inlet in proximity to the axis of the impeller communicating with the pumping chamber inlet port, and opposed outlets at the periphery of the impeller spaced from the inlets communicating with the pumping chamber outlet port.
Claim 9
Dependent Claim
38 words
The fluid pump of claim 5 wherein said electromagnetic means comprise conducting wire windings housed within the peripheral structure of the pump housing electromagnetically coupled to one or more magnets housed within the peripheral structure of the impeller.
Claim 10
Dependent Claim
53 words
The fluid pump of claim 5 wherein said electromagnetic means comprise conducting wire windings housed within a stator located internal to the impeller, said stator being in structural communication with the pump housing, and wherein said windings are electromagnetically coupled to one or more magnets housed within the internal structure of the impeller.
Claim 11
Dependent Claim
19 words
The fluid pump of claim 5, wherein the density of said impeller is similar to that of the fluid.
Claim 12
Dependent Claim
49 words
The fluid pump of claim 9, wherein the impeller possesses opposed inlets in proximity to the axis of the impeller communicating with the pumping chamber inlet port, and opposed fluid outlets at the periphery of the impeller spaced form the fluid inlets communicating with the pumping chamber outlet port.
Claim 13
Dependent Claim
55 words
The fluid pump of claim 10, wherein said impeller includes opposed axially extending neck portions, the proximal portion of each said neck portion being attached to, and centered on, a central axial surface of the impeller, and the distal end of each said neck portion being housed within the corresponding adjacent pumping chamber inlet port.
Claim 14
Dependent Claim
72 words
The fluid pump of claim 11 wherein said means for conducting fluid from the periphery of the impeller and discharging so as to stabilize the impeller by levitating fluid forces is comprised of conduits emanating from the pumping chamber outlet port, each said conduit terminating in structure defining three or more fluid jet ports within the pumping chamber inlet port in general proximity to the axially extending neck portion of the impeller.
Claim 15
Dependent Claim
38 words
The fluid pump of claim 12 wherein said impeller includes a frusto-conical hood element attached to the distal end of each axially extending neck portion, said hood element having a medially-facing concave surface and a distally-facing convex surface.
Claim 16
Dependent Claim
34 words
The fluid pump of claim 13 wherein the fluid jet ports of each conduit terminate within a region of the pumping chamber inlet port subtended by the concave surface of the frusto-conical hood element.
Claim 17
Dependent Claim
48 words
The fluid pump of claim 5, wherein the impeller possesses opposed inlets in general proximity to the axis of the impeller, communicating with the pumping chamber inlet port, and opposed outlets at the periphery of the impeller spaced from the inlets, communicating with the pumping chamber outlet port.
Claim 18
Dependent Claim
55 words
The fluid pump of claim 15, wherein said impeller includes opposed axially extending neck portions, the proximal portion of each said neck portion being attached to, and centered on, a central axial surface of the impeller, and the distal end of each said neck portion being housed within the corresponding adjacent pumping chamber inlet port.
Claim 19
Dependent Claim
72 words
The fluid pump of claim 16 wherein said means for conducting fluid from the periphery of the impeller and discharging so as to stabilize the impeller by levitating fluid forces is comprised of conduits emanating from the pumping chamber outlet port, each said conduit terminating in structure defining three or more fluid jet ports within the pumping chamber inlet port in general proximity to the axially extending neck portion of the impeller.
Claim 20
Dependent Claim
38 words
The fluid pump of claim 17 wherein said impeller includes a frusto-conical hood element attached to the distal end of each axially extending neck portion, said hood element having a medially-facing concave surface and a distally-facing convex surface.
Claim 21
Dependent Claim
34 words
The fluid pump of claim 18 wherein the fluid jet ports of each conduit terminate within a region of the pumping chamber inlet port subtended by the concave surface of the frusto-conical hood element.
References Cited (Backward Citations)
US3128988A
Cited
US845816A
Cited
US888654A
Cited
US1026101A
Cited
US2864552A
Cited
US3122101A
Cited
US3401640A
Cited
US3608088A
Cited
US3647324A
Cited
US4135253A
Cited
US4213207A
Cited
US4382199A
Cited
US4688998A
Cited
US4475866A
Cited
US4704121A
Cited
US4589822A
Cited
US4844707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |