US3188968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pumps
Assignee: Individual
•
Filing: 1963-02-12
•
Granted: 1965-06-15
•
Expires: 1983-02-12
Abstract
No abstract record available.
Inventors
- 👤 Kenton D Mcmahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:58
CPC Classifications
F; F04; F04D; F04D1/00; F04D1/06; F04D1/063; F04D1/066; F04D13/00; F04D13/02; F04D13/06; F04D13/0606; F04D13/0613
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
207 words
A CENTRIFUGAL LIQUID SUBMERSIBLE PUMP COMPRISING A PERIPHERAL CASING, TWO COAXIAL PUMP STAGES IN SAID CASING, EACH HAVING AN INLET EYE AND AN IMPELLER, THE FIRST STAGE HAVING A PLURALITY OF INLET RADIAL PASSAGEWAYS EXTENDING THROUGH AND FROM SAID CASING FOR DIRECTING THE LIQUID TO BE PUMPED IN A PLURALITY OF RADIAL STREAMS INWARDLY TOWARDS THE EYE OF THE FIRST STAGE, SAID INLET PASSAGEWAYS BEING CIRCUMFERENTIALLY DISTRIBUTED SO THAT THE RESULTANT OF THE RADIAL JET MOMENTUM ON ONE SIDE OF ANY SELECTED RADIAL PLANE PASSING THROUGH THE IMPELLER AXIS IS SUBSTANTIALLY EQUAL TO AND IN SUBSTANTIAL RADIAL ALIGNMENT WITH THE RESULTANT OF THE RADIAL JET MOMENTUM ON THE OTHER SIDE OF SAID PLANE, AND MEANS FOR DISCHARGING THE PUMPED LIQUID FROM SAID FIRST STAGE INTO A PLURALITY OF DISCHARGE STREAMS, SAID SECOND STAGE HAVING INLET PASSAGEWAYS FOR DIRECTING SAID DISCHARGE STREAMS IN A PLURALITY OF RADIAL STREAMS TOWARDS THE EYE OF SAID SECOND STAGE, THE LATTER INLET PASSAGEWAYS BEING CIRCUMFERENTIALLY DISTRIBUTED SO THAT THE RESULTANT OF THE RADIAL JET MOMENTUM ON ON SIDE OF ANY SELECTED RADIAL PLANE PASSING THROUGH THE IMPELLER AXIS IS SUBSTANTIALLY EQUAL TO AND IN SUBSTANTIAL RADIAL ALIGNMENT WITH THE RESULTANT OF THE RADIAL JET MOMENTUM ON THE OTHER SIDE OF SAID PLANE.
Claim 2
Dependent Claim
207 words
A CENTRIFUGAL LIQUID SUBMERSIBLE PUMP COMPRISING A PERIPHERAL CASING, TWO COAXIAL PUMP STAGES IN SAID CASING, EACH HAVING AN INLET EYE AND AN IMPELLER, THE FIRST STAGE HAVING A PLURALITY OF INLET RADIAL PASSAGEWAYS EXTENDING THROUGH AND FROM SAID CASING FOR DIRECTING THE LIQUID TO BE PUMPED IN A PLURALITY OF RADIAL STREAMS INWARDLY TOWARDS THE EYE OF THE FIRST STAGE, SAID INLET PASSAGEWAYS BEING CIRCUMFERENTIALLY DISTRIBUTED SO THAT THE RESULTANT OF THE RADIAL JET MOMENTUM ON ONE SIDE OF ANY SELECTED RADIAL PLANE PASSING THROUGH THE IMPELLER AXIS IS SUBSTANTIALLY EQUAL TO AND IN SUBSTANTIAL RADIAL ALIGNMENT WITH THE RESULTANT OF THE RADIAL JET MOMENTUM ON THE OTHER SIDE OF SAID PLANE, AND MEANS FOR DISCHARGING THE PUMPED LIQUID FROM SAID FIRST STAGE INTO A PLURALITY OF DISCHARGE STREAMS, SAID SECOND STAGE HAVING INLET PASSAGEWAYS FOR DIRECTING SAID DISCHARGE STREAMS IN A PLURALITY OF RADIAL STREAMS TOWARDS THE EYE OF SAID SECOND STAGE, THE LATTER INLET PASSAGEWAYS BEING CIRCUMFERENTIALLY DISTRIBUTED SO THAT THE RESULTANT OF THE RADIAL JET MOMENTUM ON ON SIDE OF ANY SELECTED RADIAL PLANE PASSING THROUGH THE IMPELLER AXIS IS SUBSTANTIALLY EQUAL TO AND IN SUBSTANTIAL RADIAL ALIGNMENT WITH THE RESULTANT OF THE RADIAL JET MOMENTUM ON THE OTHER SIDE OF SAID PLANE.
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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) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |