US3112708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: Boelkow Entwicklungen KG
•
Filing: 1961-03-21
•
Granted: 1963-12-03
•
Expires: 1981-03-21
Abstract
No abstract record available.
Inventors
- 👤 Kaufmann Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:53
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2261; F04D29/2277
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A ROTARY PUMP HAVING AN AXIAL INLET AND A PERIPHERAL DISCHARGE; A ROTOR INCLUDING AN AXIALLY RELATIVELY ELONGATED HUB; AND A PLURALITY OF BLADE ELEMENTS EXTENDING FROM ANGULARLY SPACED PORTIONS OF SAID HUB RADIALLY OUTWARDLY AND AXIALLY IN A SPIRAL THEREFROM, SAID BLADE ELEMENTS HAVING PORTIONS OF APPRECIABLE AXIAL EXTENT, ADJACENT BLADE ELEMENTS BEING SPACED TO DEFINE FLOW CHANNELS DIRECTING FLOW OF FLUID RADIALLY OUTWARDLY AND AXIALLY FROM SAID INLET TO SAID PERIPHERAL DISCHARGE; AND MEANS PROVIDING AT LEAST ONE WALL SURFACE SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF SAID ROTOR AND OVERLYING A SURFACE OF EACH BLADE ELEMENT LYING IN A RADIAL PLANE; EACH BLADE ELEMENT SURFACE HAVING GROOVES EXTENDING THEREACROSS AT SPACED LOCATIONS ALONG THE EXTENT THEREOF FOR FLUID FLOW BETWEEN SAID CHANNELS.
Claim 2
Dependent Claim
125 words
IN A ROTARY PUMP HAVING AN AXIAL INLET AND A PERIPHERAL DISCHARGE; A ROTOR INCLUDING AN AXIALLY RELATIVELY ELONGATED HUB; AND A PLURALITY OF BLADE ELEMENTS EXTENDING FROM ANGULARLY SPACED PORTIONS OF SAID HUB RADIALLY OUTWARDLY AND AXIALLY IN A SPIRAL THEREFROM, SAID BLADE ELEMENTS HAVING PORTIONS OF APPRECIABLE AXIAL EXTENT, ADJACENT BLADE ELEMENTS BEING SPACED TO DEFINE FLOW CHANNELS DIRECTING FLOW OF FLUID RADIALLY OUTWARDLY AND AXIALLY FROM SAID INLET TO SAID PERIPHERAL DISCHARGE; AND MEANS PROVIDING AT LEAST ONE WALL SURFACE SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF SAID ROTOR AND OVERLYING A SURFACE OF EACH BLADE ELEMENT LYING IN A RADIAL PLANE; EACH BLADE ELEMENT SURFACE HAVING GROOVES EXTENDING THEREACROSS AT SPACED LOCATIONS ALONG THE EXTENT THEREOF FOR FLUID FLOW BETWEEN SAID CHANNELS.
References Cited (Backward Citations)
CA503332A
Cited
US1099921A
Cited
US1367343A
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US1556657A
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GB358457A
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US2101653A
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DE691098C
Cited
GB502213A
Cited
FR893205A
Cited
US2737898A
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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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |