US3957389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping apparatus and process characterized by gentle operation
Assignee: Bio Medicus Inc
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Filing: 1975-02-03
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Granted: 1976-05-18
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Expires: 1995-02-03
Abstract
Abstract Pumps wherein smooth surfaced rotators cause propulsion of a delicate fluid without significant damage to the fluid. The pumps may be used as heart pumps, blood pumps, and pumps for all types of fluids in connection with the maintenance of life or biological functions in a human or animal subject in many in vivo, ex vivo, or in vitro applications, or for any other application requiring gentle handling. The pumps may be actuated by internal or external electric motors, and the rotators may be configured to converge mutually as an inverse function of distance from the axis of the rotators. The rotators may be connected together, by pins passing through the fluid passages, for mounting and driving as a unit, or may be mounted and driven independently to further eliminate the possibility of damage to the fluid by rotator-connection members.
Inventors
- 👤 Edson Howard Rafferty
- 👤 Harold D. Kletschka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:34
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; A; A61; A61M; A61M60/00; A61M60/10; A61M60/104; A61M60/117; A61M60/122; A61M60/196; A61M60/20; A61M60/205; A61M60/216; A61M60/40; A61M60/403; A61M60/408; A61M60/411; A61M60/416; A61M60/419; A61M60/50; A61M60/508; A61M60/538; A61M60/80; A61M60/802; A61M60/827; A61M60/855; A61M60/871; A61M60/876; F04D5/00; F04D5/001; A61M60/126; A61M60/148; A61M60/422; F05; F05B; F05B2200/00; F05B2200/10; F05B2200/15; Y; Y10; Y10S; Y10S415/00; Y10S415/90
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
121 words
The method of pumping fluids without causing significant damage thereto which comprises: 1. dividing the fluid to be pumped into a plurality of independent streams; 2. accelerating the several streams by superficial contact thereof with smooth, nested, rotating members defining moving walls of a plurality of coaxial passages extending along the common axis and increasing in mean diameter with distance along said axis, at least two of said passages having a common wall defined by one of said rotating members; 3. driving said members independently at selected angular velocities which may be the same so that the flows of fluid in the several passages are substantially the same; and 4. combining the outputs from the passages to comprise the pumping output.
Claim 2
Independent Claim
121 words
The method of pumping fluids without causing significant damage thereto which comprises: 1. dividing the fluid to be pumped into a plurality of independent streams; 2. accelerating the several streams by superficial contact thereof with smooth, nested, rotating members defining moving walls of a plurality of coaxial passages extending along the common axis and increasing in mean diameter with distance along said axis, at least two of said passages having a common wall defined by one of said rotating members; 3. driving said members independently at selected angular velocities which may be the same so that the flows of fluid in the several passages are substantially the same; and 4. combining the outputs from the passages to comprise the pumping output.
Claim 3
Independent Claim
110 words
The method of pumping biological fluids without causing significant damage thereto which comprises: 1. dividing the fluid to be pumped into a plurality of independent streams; 2. accelerating the several streams by superficial contact thereof with smooth, nested, rotating members defining moving walls of a plurality of coaxial passages extending along the common axis and increasing in mean diameter with distance along said axis, at least two of said passages having a common wall defined by one of said rotating members; 3. driving said members independently at selected angular velocities which may be the same so that the flows of fluid in the several passages are substantially the same; and
Claim 4
Independent Claim
110 words
The method of pumping biological fluids without causing significant damage thereto which comprises: 1. dividing the fluid to be pumped into a plurality of independent streams; 2. accelerating the several streams by superficial contact thereof with smooth, nested, rotating members defining moving walls of a plurality of coaxial passages extending along the common axis and increasing in mean diameter with distance along said axis, at least two of said passages having a common wall defined by one of said rotating members; 3. driving said members independently at selected angular velocities which may be the same so that the flows of fluid in the several passages are substantially the same; and
Claim 5
Dependent Claim
11 words
combining the outputs from the passages to comprise the pumping output.
Claim 6
Dependent Claim
11 words
combining the outputs from the passages to comprise the pumping output.
Claim 7
Independent Claim
79 words
The method of pumping material without causing significant damage thereto which comprises accelerating the material by superficial contact thereof with smooth, nested rotating members defining moving walls of a plurality of coaxial passages traversed by said fluid, said passages extending along the common axis and increasing in mean diameter with distance along said axis, driving said members independently at selected angular velocities which may be the same, and combining the outputs from the passages to comprise the pumping output.
Claim 8
Independent Claim
79 words
The method of pumping material without causing significant damage thereto which comprises accelerating the material by superficial contact thereof with smooth, nested rotating members defining moving walls of a plurality of coaxial passages traversed by said fluid, said passages extending along the common axis and increasing in mean diameter with distance along said axis, driving said members independently at selected angular velocities which may be the same, and combining the outputs from the passages to comprise the pumping output.
Claim 9
Dependent Claim
24 words
The method of claim 3 in which at least two of the passages have a common wall defined by one of the rotating members.
Claim 10
Dependent Claim
12 words
The method of claim 3 in which the material is a fluid.
Claim 11
Dependent Claim
13 words
The method of claim 3 in which the material is a delicate fluid.
Claim 12
Dependent Claim
13 words
The method of claim 3 in which the material is a biological fluid.
Claim 13
Dependent Claim
13 words
The method of claim 3 in which the material is a body fluid.
Claim 14
Dependent Claim
12 words
The method of claim 3 in which the material is a liquid.
Claim 15
Dependent Claim
13 words
The method of claim 3 in which the material is a delicate liquid.
Claim 16
Dependent Claim
13 words
The method of claim 3 in which the material is a biological liquid.
Claim 17
Dependent Claim
16 words
The method of claim 3 in which the material is a liquid susceptible to mechanical damage.
Claim 18
Dependent Claim
16 words
The method of claim 3 in which the material is a liquid vehicle bearing delicate solids.
Claim 19
Dependent Claim
12 words
The method of claim 3 in which the material is a suspension.
Claim 20
Dependent Claim
17 words
The method of claim 3 in which the material is a suspension of metallic particles in liquid.
Claim 21
Dependent Claim
13 words
The method of claim 3 in which the material is a liquid-solid mixture.
Claim 22
Dependent Claim
12 words
The method of claim 3 in which the material is a precipitate.
Claim 23
Dependent Claim
12 words
The method of claim 3 in which the material is a slurry.
Claim 24
Dependent Claim
11 words
The method of claim 3 in which the material is water.
Claim 25
Dependent Claim
11 words
The method of claim 3 in which the material is blood.
Claim 26
Dependent Claim
12 words
The method of claim 3 in which the material is a foodstuff.
Claim 27
Dependent Claim
13 words
The method of claim 3 in which the material is a plastic foam.
Claim 28
Dependent Claim
11 words
The method of claim 3 in which the material is sewage.
Claim 29
Dependent Claim
12 words
The method of claim 3 in which the material is sea water.
Claim 30
Dependent Claim
11 words
The method of claim 3 in which the material is paint.
Claim 31
Dependent Claim
11 words
The method of claim 3 in which the material is gas.
References Cited (Backward Citations)
GB331142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-18 | 1979-11-17 | 1980-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-18 | 1983-11-17 | 1984-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-18 | 1987-11-17 | 1988-05-18 | $7700.00 | Window Closed / Lapsed |