US4110059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping device
Assignee: LATIMER NV DE RUYTERKADE 62 CURACAO NETHERLANDS ANTILLES
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Filing: 1976-08-19
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Granted: 1978-08-29
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Expires: 1996-08-19
Abstract
Abstract An electrical pumping device comprising at least two coaxially rotatable pump impellers, at least two coaxial separate passageways, one impeller positioned within each passageway, pole support parts attached to each of said impellers, said pole support parts forming a part of at least one electromotor and distributed about the axis of rotation in a radially spaced relation.
Inventors
- 👤 Miguel Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:59
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D1/00; F04D1/003; F04D13/04; F04D13/043; F04D13/12; F04D3/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
84 words
An electrical pumping device comprising at least two coaxially rotatable pump impellers, at least two coaxial separate passageways, one impeller positioned within each passageway, pole support parts attached to each of said impellers, said pole support parts forming a part of at least one electromotor and distributed about the axis of rotation in a radially spaced relation, each pump impeller together with adjacent pump impeller forming the counter-rotating parts of an electromotor by cooperation of the pole support parts connected with these pump impellers.
Claim 2
Dependent Claim
84 words
An electrical pumping device comprising at least two coaxially rotatable pump impellers, at least two coaxial separate passageways, one impeller positioned within each passageway, pole support parts attached to each of said impellers, said pole support parts forming a part of at least one electromotor and distributed about the axis of rotation in a radially spaced relation, each pump impeller together with adjacent pump impeller forming the counter-rotating parts of an electromotor by cooperation of the pole support parts connected with these pump impellers.
Claim 3
Dependent Claim
18 words
The pumping device according to claim 1, including a housing in which the pump impellers are rotatably mounted.
Claim 4
Dependent Claim
44 words
The pumping device according to claim 1, wherein each pump impeller includes a pipe with a circular cross-section which is arranged coaxially with respect to the imaginary axis of rotation and on which pipe surfaces are secured which project radially outwardly or radially inwardly.
Claim 5
Dependent Claim
21 words
The pumping device according to claim 2, wherein the pipe of each pump impeller is designed as a pole support part.
Claim 6
Dependent Claim
28 words
The pumping device according to claim 3, wherein the impellers and their pipes are counter-rotating forming an electromotor, said pipes are rotatably mounted directly abutting on one another.
Claim 7
Dependent Claim
16 words
The pumping device according to claim 3, wherein the pump surfaces are designed as propeller vanes.
Claim 8
Dependent Claim
19 words
The pumping device according to claim 3, wherein the pump surfaces are designed as screw surfaces or worm surfaces.
Claim 9
Dependent Claim
85 words
The pumping device according to claim 1, wherein the common housing has a circular cylindrical jacket which coaxially surrounds the pump impellers and which outwardly defines a passageway with a circular ring cross-section radially outside the pipe of the outermost pump impeller as well as a support part which extends traversely to the imaginary axis of rotation and which is provided with passageway openings corresponding to the passageways of the pump impellers, the pump impellers being rotatably mounted directly or indirectly in said support part.
Claim 10
Dependent Claim
32 words
The pumping device according to claim 8, wherein the outer apertures of the pasageway openings of the support part of the housing are designed to be connected to channels leading away therefrom.
Claim 11
Dependent Claim
36 words
The pumping device according to claim 9, wherein the housing has connections for connecting lines to or from the individual passageways both at the intake of the pumping device as well as at the outlet thereof.
Claim 12
Dependent Claim
18 words
The pumping device according to claim 1, wherein each pump impeller is designed as a radial pump impeller.
Claim 13
Dependent Claim
33 words
The pumping device according to claim 1 including a line, the outlet end of the passageway of a pump impeller being connected with the passageway of the adjacent pump impeller via said line.
Claim 14
Dependent Claim
40 words
The pumping device according to claim 2, wherein at least one pump impeller is provided whose pole support part cooperates with a pole support part stationarily secured to the housing and forms an electromotor together with said pole support part.
Claim 15
Dependent Claim
27 words
The pumping device according to claim 1, wherein the poles on one of the cooperating pole support parts forming an electromotor are designed as permanent magnetic poles.
Claim 16
Dependent Claim
26 words
The pumping device according to claim 1 including seals, said seals for mutual sealing being provided on the parts which are rotatable relative to one another.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |