Patent US3077161A successfully refreshed from Google Patents.
US3077161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump
Assignee: Westinghouse Electric Corp
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Filing: 1961-03-23
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Granted: 1963-02-12
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Expires: 1981-03-23
Abstract
No abstract record available.
Inventors
- 👤 Harvey G Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:36
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/047; F04D13/00; F04D13/02; F04D13/06; F04D13/0606; F04D13/0613; F04D29/041; F04D29/0416
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
223 words
IN A FLUID PUMP, THE COMBINATION COMPRISING A PUMP CASING HAVING AN INTAKE AND AN OUTLET PORT, A PUMPING IMPELLER HAVING A HUB PORTION AND A SHROUD PORTION, RADIALLY EXTENDING VANES LOCATED IN SAID IMPELLER AND DISPOSED ON SAID SHROUD PORTION, A ROTATABLE SHAFT FIXEDLY SECURED TO SAID HUB PORTION OF SAID IMPELLER AND PASSING THROUGH AN APERTURE IN SAID PUMP CASING, SAID PUMP CASING HAVING AN IMPELLER BALANCING CHAMBER FORMED THEREIN BETWEEN SAID CASING AND SAID HUB AND SHROUD PORTIONS OF SAID IMPELLER, SAID BALANCING CHAMBER BEING DISPOSED TO COMMUNICATE WITH SAID APERTURE IN SAID PUMP CASING AND WITH SAID CASING OUTLET PORT, SEALING MEANS DISPOSED BETWEEN SAID BALANCING CHAMBER AND SAID CASING APERTURE AND SAID CASING OUTLET PORT, A THRUST RING FIXEDLY SECURED TO ONE OF SAID HUB AND SHROUD PORTIONS AND DISPOSED IN SAID BALANCING CHAMBER, SAID THRUST RING HAVING A PLURALITY OF SUBSTANTIALLY RADIALLY EXTENDING OPENINGS THEREIN, EACH HAVING AN INNER END DISPOSED CLOSER TO SAID HUB PORTION THAN THE OUTER END THEREOF, ONE OF SAID HUB AND SHROUD PORTIONS HAVING SUBSTANTIALLY AXIAL OPENINGS THERETHROUGH WITH ONE END OF EACH OF SAID AXIAL OPENINGS COMMUNICATING WITH THE INTERIOR OF SAID IMPELLER, THE OTHER ENDS OF SAID AXIAL OPENINGS COMMUNICATING WITH THE INNER ENDS OF SAID RADIAL OPENINGS, SAID OUTER ENDS OF SAID RADIAL OPENINGS COMMUNICATING WITH SAID BALANCING CHAMBER.
Claim 2
Dependent Claim
223 words
IN A FLUID PUMP, THE COMBINATION COMPRISING A PUMP CASING HAVING AN INTAKE AND AN OUTLET PORT, A PUMPING IMPELLER HAVING A HUB PORTION AND A SHROUD PORTION, RADIALLY EXTENDING VANES LOCATED IN SAID IMPELLER AND DISPOSED ON SAID SHROUD PORTION, A ROTATABLE SHAFT FIXEDLY SECURED TO SAID HUB PORTION OF SAID IMPELLER AND PASSING THROUGH AN APERTURE IN SAID PUMP CASING, SAID PUMP CASING HAVING AN IMPELLER BALANCING CHAMBER FORMED THEREIN BETWEEN SAID CASING AND SAID HUB AND SHROUD PORTIONS OF SAID IMPELLER, SAID BALANCING CHAMBER BEING DISPOSED TO COMMUNICATE WITH SAID APERTURE IN SAID PUMP CASING AND WITH SAID CASING OUTLET PORT, SEALING MEANS DISPOSED BETWEEN SAID BALANCING CHAMBER AND SAID CASING APERTURE AND SAID CASING OUTLET PORT, A THRUST RING FIXEDLY SECURED TO ONE OF SAID HUB AND SHROUD PORTIONS AND DISPOSED IN SAID BALANCING CHAMBER, SAID THRUST RING HAVING A PLURALITY OF SUBSTANTIALLY RADIALLY EXTENDING OPENINGS THEREIN, EACH HAVING AN INNER END DISPOSED CLOSER TO SAID HUB PORTION THAN THE OUTER END THEREOF, ONE OF SAID HUB AND SHROUD PORTIONS HAVING SUBSTANTIALLY AXIAL OPENINGS THERETHROUGH WITH ONE END OF EACH OF SAID AXIAL OPENINGS COMMUNICATING WITH THE INTERIOR OF SAID IMPELLER, THE OTHER ENDS OF SAID AXIAL OPENINGS COMMUNICATING WITH THE INNER ENDS OF SAID RADIAL OPENINGS, SAID OUTER ENDS OF SAID RADIAL OPENINGS COMMUNICATING WITH SAID BALANCING CHAMBER.
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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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |